import java.util.Scanner;
public class BMI {
     double height;
     double weight;
     double bmi;
     BMI(double j,double k){ weight=j;height=k;bmi=weight/(height*height);}
}
class App{
	public static void main(String[] x ){
		Scanner sc=new Scanner(System.in);
		System.out.print("input weight:\n");
		double weight=sc.nextDouble();
		System.out.print("input height:\n");
		double height=sc.nextDouble();
		BMI b=new BMI(weight,height);
		System.out.println(b.bmi);
		if(b.bmi<18.5)
			System.out.println("体重过轻");
		if(b.bmi>=18.5 &&b.bmi<24)
			System.out.println("正常范围");
		if(b.bmi>=24 &&b.bmi<27)
			System.out.println("体重过重");
		if(b.bmi>=27 &&b.bmi<30)
			System.out.println("轻度肥胖");
		if(b.bmi>=30 &&b.bmi<35)
			System.out.println("中度肥胖");
		if(b.bmi>=35)
			System.out.println("重度肥胖");
		
	}
}

public static void main(String[] args) {
		Scanner s=new Scanner(System.in);
		System.out.println("请输入要判断的年份(如：2019)");
		int year=s.nextInt();
		if(year%4==0&&year%100!=0) {
			System.out.println("输入的年份是闰年");
		}
		else if(year%400==0) {
			System.out.println("输入的年份是闰年");
		}
		else {
			System.out.println("输入的年份不是闰年");
		}
	}

public static void isLeapYear(){
        System.out.println("请输入年份: ");
        Scanner scanner = new Scanner(System.in);
        int year = scanner.nextInt();
        if ((0 == year % 4 && 0!= year % 100 )||(0 == year % 400)){
            System.out.println(year+"年是闰年");
        }else {
            System.out.println(year + "年不是闰年");
        }
    }

import java.util.Scanner;

public class Leapyear {
  public static void main(String[] args){
	  Scanner s = new Scanner(System.in);
	  System.out.println("请输入年份");
	  int year = s.nextInt();
	  int a = year%4;
	  int b = year%100;
	  int c = year%400;
	  
	  if ((a==0)&&(b!=0)){
		  System.out.println(year+"是闰年"); 
	  }
	  else if (c==0){
		  System.out.println(year+"是闰年");
	  }		  
	  else {
		  System.out.println(year+"不是闰年");
	  }
		 		  
  }
}

import java.util.Scanner;

public class If {
    public static void main(String[] args) {
    Scanner s = new Scanner(System.in);
    System.out.println("请输入身高(m)");
    float Height = s.nextFloat();
    System.out.println("请输入体重(Kg)");
    float Weight = s.nextFloat();
    float BMI = (float)(Weight/(Height*Height));
    System.out.println("当前的BMI是：" + BMI);
    
    if (BMI<18.5)
    	System.out.println("身体状态是：体重过轻");	
    else if ((BMI>=18.5)&&(BMI<24))
    	System.out.println("身体状态是：正常范围");		
    else if ((BMI>=24)&&(BMI<27))
    	System.out.println("身体状态是：体重过重");		
    else if ((BMI>=27)&&(BMI<30))
    	System.out.println("身体状态是：轻度肥胖");		
    else if ((BMI>=30)&&(BMI<35))
    	System.out.println("身体状态是：中度肥胖");		
    else  
    	System.out.println("身体状态是：重度肥胖");		
    }
}

               System.out.println("请输入身高 (m)：");
		Scanner s=new Scanner(System.in);
		float height=s.nextFloat();
		
		System.out.println("请输入体重 (kg)：");
		Scanner ss=new Scanner(System.in);
		float weight=ss.nextFloat();
		
		float BMI=weight/(height*height);
		System.out.println("当前的BMI是："+BMI);
		
		if(BMI<18.5)
		   System.out.println("体重过轻");
		else if(18.5<=BMI&BMI<24)
			System.out.println("正常范围");
		else if(24<=BMI&BMI<24)
			System.out.println("体重过重");
		else if(27<=BMI&BMI<27)
			System.out.println("轻度肥胖");
		else if(30<=BMI&BMI<30)
			System.out.println("中度肥胖");
		else if(35<=BMI)
			System.out.println("重度肥胖");

import java.util.Scanner;

public class Bmi {
    void healthState(float b){
        if (b<18.5)
            System.out.println ("体重过轻");
        else if (b>=18.5 && b<24)
            System.out.println ("正常范围");
        else if (b>=24 && b<27)
            System.out.println ("体重过重");
        else if (b>=27 && b<30)
            System.out.println ("轻度肥胖");
        else if (b>=30 && b<35)
            System.out.println ("中毒肥胖");
        else if (b>=35)
            System.out.println ("重度肥胖");
    }
    public static void main(String[] args){
        float weight,height,bmi;
        Bmi you=new Bmi();
        Scanner scanner=new Scanner(System.in);
        System.out.println("你的身高（m）：");
        height=scanner.nextFloat();
        System.out.println("你的体重（kg）：");
        weight=scanner.nextFloat();
        bmi=weight/(height*height);
        System.out.println("你的BMI指数："+bmi);
        System.out.print("你的身体状态是：");
        you.healthState(bmi);
    }
}



import java.util.Scanner;

public class Year {
    public static void main(String[] args){
        int year;
        Scanner s=new Scanner(System.in);
        System.out.println("请输入年份：");
        year=s.nextInt();
        if (year%4==0 && year%100!=0)
            System.out.println(year+"是闰年");
        else if (year%400==0)
            System.out.println(year+"是闰年");
        else
            System.out.println(year+"不是闰年");
    }
}

import java.util.Scanner;

/**
 * @author ??
 * @date ??
 */
public class Test {

    public static void main(String[] args) {

        ///BMI
        Scanner scanner = new Scanner(System.in);
        System.out.println("请告诉我您的身高和体重！系统将判断您的身体状况！");
        System.out.println("请输入您的身高(m)：");
        double height = scanner.nextDouble();
        System.out.println("请输入您的体重(kg):");
        double weight = scanner.nextDouble();
        double bmi = weight / (height * height);

        if (bmi < 18.5) {
            System.out.println("您的体重过轻");
        } else if (bmi < 24) {
            System.out.println("您的体重正常");
        } else if (bmi < 27) {
            System.out.println("您的体重过重");
        } else if (bmi < 30) {
            System.out.println("您的体重轻度肥胖");
        } else if (bmi < 35) {
            System.out.println("您的体重中度肥胖");
        } else {
            System.out.println("您的体重中度肥胖");
        }


        //闰年
        Scanner scan = new Scanner(System.in);
        System.out.println("请输入一个年份！系统将判断是否为闰年！");
        int i = scan.nextInt();
        if (i % 400 == 0 || (i % 4 == 0 && i % 100 != 0)) {
            System.out.println(i + "年是闰年");
        } else {
            System.out.println(i + "年不是闰年");
        }

        
    }
}

package how2java;

/*
使用Scanner收集你的身高体重，并计算出你的BMI值是多少？

BMI的计算公式是 体重(kg) / (身高*身高)

比如邱阳波的体重是72kg, 身高是1.69，那么这位同学的BMI就是
72 / (1.69*1.69) = ?

然后通过条件判断BMI的范围，打印出是超重还是正常
 */

import java.util.Scanner;

public class Bmi {
    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        System.out.println("请输入你的升高（cm）：");
        float height = s.nextInt();
        System.out.println("请输入你的体重（kg）：");
        float weight = s.nextInt();

        float bmi = weight/((height/100)*(height/100));
        System.out.println("这位同学的BMI值是：" + bmi);

        //判断肥胖指数
        if(bmi < 18.5) System.out.println("这位同学体重过轻");
        if(bmi >= 18.5 && bmi <24) System.out.println("正常范围");
        if(bmi >= 24 && bmi < 27) System.out.println("体重过重");
        if (bmi>= 27 && bmi <30) System.out.println("轻度肥胖");
        if(bmi>=30 && bmi< 35) System.out.println("中度肥胖");
        if(bmi>=35) System.out.println("重度肥胖");
    }
}

package hhhh;
import java.util.Scanner;
public class lianxi {
	public static void main(String [] args)
	{
		Scanner input=new Scanner(System.in);
        System.out.println("请输入身高(m):");
        double sg=input.nextDouble();
        System.out.println("请输入体重(kg):");
        double tz=input.nextDouble();
        double BMI=tz/Math.pow(sg,2);
        System.out.println("当前的BIM是:"+BMI);
        if(BMI<18.5)
            System.out.println("身体状态是:"+"体重过轻");
        else if(BMI>=18.5&&BMI<24)
            System.out.println("身体状态是:"+"正常范围");
        else if(BMI>=24&&BMI<27)
            System.out.println("身体状态是:"+"体重过重");
        else if(BMI>=27&&BMI<30)
            System.out.println("身体状态是:"+"轻度肥胖");
        else if(BMI>=30&&BMI<35)
            System.out.println("身体状态是:"+"中度肥胖");
        else
            System.out.println("身体状态是:"+"重度肥胖");
	}
}

import java.util.Scanner;
public class Years{
    public static void main(String[]args){
        Scanner s= new Scanner(System.in);
        int x =s.nextInt();
        System.Out.println("请输入年份：" + x);
        if (x%4==0 && x%100!=0 || x%400==0)
            System.Out.println(x + "是闰年");
        else
            System.Out.println(x + "不是闰年：" );
    }
}

import java.util.Scanner;
public class YourBMI{
    public static void main(String[]args){
        Scanner s= new Scanner(System.in);
        float a = s.nextFloat();
        System.Out.println("请输入身高(m)：" + a);
        float b = s.nextFloat();
        System.Out.println("请输入体重(kg)” + b);
        float c = b/(a*a);
        System.Out.println("当前的BMI是" + c);
        if c<18.5
            System.Out.println("身体状态是：体重过轻"）；
        else if (c>=18.5 && c<24)
            System.Out.println("身体状态是：体重正常"）；
        else if (c>=24 && c<27)
            System.Out.println("身体状态是：体重过重"）；
        else if (c>=27 && c<30)
            System.Out.println("身体状态是：轻度肥胖"）；
        else if (c>=30 && c<35)
            System.Out.println("身体状态是：中度肥胖"）；
        else if c>=35
            System.Out.println("身体状态是：重度肥胖"）；
    }
}

import java.util.Scanner;
public class YourBMI{
    public static void main(String[]args){
        Scanner s= new Scanner(System.in);
        float a = s.nextFloat();
        System.Out.println("请输入身高(m)：" + a);
        float b = s.nextFloat();
        System.Out.println("请输入体重(kg)” + b);
        float c = b/(a*a);
        System.Out.println("当前的BMI是" + c);
        if c<18.5
            System.Out.println("身体状态是：体重过轻"）；
        else if (c>=18.5 && c<24)
            System.Out.println("身体状态是：体重正常"）；
        else if (c>=24 && c<27)
            System.Out.println("身体状态是：体重过重"）；
        else if (c>=27 && c<30)
            System.Out.println("身体状态是：轻度肥胖"）；
        else if (c>=30 && c<35)
            System.Out.println("身体状态是：中度肥胖"）；
        else if c>=35
            System.Out.println("身体状态是：重度肥胖"）；
    }
}

import java.util.Scanner;
public class Practice{
    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        System.out.println("请输入年份");
        int a = s.nextInt();
        if(a%4==0&& a%100!= 0)
        	System.out.println(a+"是闰年");
        else if(a%400 == 0) 
        	System.out.println(a+"是闰年");
        else
        	System.out.println(a+"不是闰年");
        	
        
    } 
}

import java.util.Scanner;
public class HelloWorld {
	public static void main(String[] args) {
		
		Scanner s = new Scanner(System.in);
		System.out.println("请输入年份");
		int year = s.nextInt();
		if(year%4==0&&year%100!=0||year%400==0)
			System.out.println(year+"是闰年");
		else
			System.out.println(year+"不是闰年");
			
		
		
	}
}

import java.util.Scanner;

public class Bmi {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入您的姓名：");
        String name=scanner.nextLine();
        System.out.println("请输入您的身高和体重并以空格分开");
        String info = scanner.nextLine();
        String[] arr = info.split(" ");
        float hight = Float.parseFloat(arr[0]);
        float weight = Float.parseFloat(arr[1]);
        String test = result(hight,weight);
        System.out.println(name+" 你的检测结果是： "+test);


    }

    public static String result(float a,float b){
        float bmi = b/(a*a);
        String str = "";
        if(bmi<18.5)str = "体重过轻";
        else if (bmi>=18.5&&bmi<24)str = "体重正常";
        else if(bmi>=24&&bmi<27)str = "体重过重";
        else if(bmi>=27&&bmi<30)str = "轻度肥胖";
        else if(bmi>=30&&bmi<35)str = "中度肥胖";
        else if(bmi>=35)str = "重度肥胖";
        return str;

    }
}

import java.util.Scanner;

public class LeapYear {
    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        
        System.out.println("请输入年份：");
        int year = s.nextInt();
        if(year % 400 == 0) 
            System.out.println(year + "是闰年");
        else if((year % 4 == 0) && (year % 100 != 0))
            System.out.println(year + "是闰年");
        else
            System.out.println(year + "不是闰年");
    }
}

import java.util.Scanner;

public class BMI {
    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        
        float height, weight, bmi;
        
        System.out.println("请输入身高(m): ");
        height = s.nextFloat();
        System.out.println("请输入体重(kg): ");
        weight = s.nextFloat();
        bmi = weight / (height * height);
        System.out.println("当前的BMI是：" + bmi);
        
        System.out.print("身体状态是：");
        if(bmi < 18.5)
            System.out.println("体重过轻");
        else if((bmi >= 18.5) && (bmi < 24))
            System.out.println("正常范围");
        else if((bmi >= 24) && (bmi < 27))
            System.out.println("体重过重");
        else if((bmi >= 27) && (bmi < 30))
            System.out.println("轻度肥胖");
        else if((bmi >= 30) && (bmi < 35))
            System.out.println("中度肥胖");
        else if(bmi >= 35)
            System.out.println("重度肥胖");
    }
}

import java.util.Scanner;
public class Test {
    public  static  void  main(String [] args) {
        System.out.println("请输入一个年份：");
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        sc.close();
        if(a%4==0&&a%100!=0||a%400==0){
            System.out.println("该年为闰年");
        }else{
            System.out.println("该年不是闰年");
        }
    }
    }

import java.util.Scanner;
public class HelloWorld {
	public static void main(String[] args) {
		Scanner s=new Scanner(System.in);
		System.out.println("请输入年份：");
		int year=s.nextInt();
		if((year%4==0&&year%100!=0) || year%400==0){
			System.out.println(year+"是闰年");
		}
		else{
			System.out.println(year+"不是闰年");
		}
    	}
}

import java.util.Scanner;
public class HelloWorld {
	public static void main(String[] args) {
		Scanner s=new Scanner(System.in);
		System.out.println("请输入身高（m）：");
		float height=s.nextFloat();
		System.out.println("请输入体重（kg）：");
		float weight=s.nextFloat();
		float BMI=weight/(height*height);
		if(BMI<18.5){
			System.out.println("身体状态是：体重过轻");
		}
		else if(BMI<24){
			System.out.println("身体状态是：正常范围");
		}
		else if(BMI<27){
			System.out.println("身体状态是：体重过重");
		}
		else if(BMI<30){
			System.out.println("身体状态是：轻度肥胖");
		}
		else if(BMI<35){
			System.out.println("身体状态是：中度肥胖");
		}
		else{
			System.out.println("身体状态是：重度肥胖");
		}

    	}
}

import java.util.Scanner;
public class HelloWorld {
	public static void main(String[] args) {
		Scanner s=new Scanner(System.in);
		System.out.println("请输入身高（m）：");
		float height=s.nextFloat();
		System.out.println("请输入体重（kg）：");
		float weight=s.nextFloat();
		float BMI=weight/(height*height);
		if(BMI<18.5){
			System.out.println("身体状态是：体重过轻");
		}
		else if(BMI<24){
			System.out.println("身体状态是：正常范围");
		}
		else if(BMI<27){
			System.out.println("身体状态是：体重过重");
		}
		else if(BMI<30){
			System.out.println("身体状态是：轻度肥胖");
		}
		else if(BMI<35){
			System.out.println("身体状态是：中度肥胖");
		}
		else{
			System.out.println("身体状态是：重度肥胖");
		}

    	}
}

public class Year {

	public static void main(String[] args){
		
		int a = 2023;
		
		if ((a % 4 == 0 && a % 100 !=0)|(a % 400 == 0)){
			
			System.out.println("这是闰年");
		}else{
			System.out.println("不是闰年");
		}
	}
}

import java.util.Scanner;
public class Shiyan{
	public static void main(String[] args){
		Scanner s = new Scanner(System.in);
		System.out.println("请输入一个年份：");
		int year = s.nextInt();
		if ((year % 4 == 0 && year % 100 !=0)|(year % 400 == 0))
			System.out.println(year+"是闰年");
		else
			System.out.println(year +"不是闰年");
	}
}

import java.util.Scanner;

public class BMI{
	public static void main(String[] args){
		Scanner s = new Scanner(System.in);
		System.out.println("Please input your hight");
		float a = s.nextFloat();
		
		System.out.println("Please input your weight");
		float b = s.nextFloat();
		float c = b/(a*a);
		System.out.println("Your bmi is " + c);
		if (c <18.5)
			System.out.println("Your weight is too tight");
		else if (c <24)
			System.out.println("Your 1111");
		else if (c< 27)
			System.out.println("<27");
		else if (c<30)
			System.out.println("<30");
		else if (c<35)
			System.out.println("<35");
		
	}
}

import java.util.Scanner;

public class LeapYear{
	public static void  main(String[] args){
		Scanner s = new Scanner(System.in);
		System.out.println("Please input the num of year");
		int year = s.nextInt();
		if (year%4==0 && year%100!=0)
			System.out.println(year+"is a leap year");
		else if (year%400==0)
			System.out.println(year + "is a leap year");
		else
			System.out.println(year +"is not a leap year");
			
		
	}
}

package beginner;
import java.util.Scanner;

public class MyTest {
	void test1()
	{
		int i = 1;
		boolean b = !(i++ == 3) ^ (i++ ==2) && (i++==3);
		System.out.println(b);
		System.out.println(i);
	}
	
	
	void test2(){
		int i = 1;
		i+=++i;
		System.out.println(i);
	}
	
	
	
	//通过Scanner输入一个1-7之间的整数，使用三元操作符判断是工作日还是周末？
	void test3(){
		Scanner s = new Scanner(System.in);
		System.out.println("今天是周几 ?");
		int a = s.nextInt();
		String b = a <= 5?"工作日":"周末";
		System.out.println("今天是"+b);
	}
	
	//BMI
	void calBMI(){
		Scanner s = new Scanner(System.in);
		System.out.println("请输入身高(m)：");
		float height = s.nextFloat();
		System.out.println("请输入体重(kg)：");
		float weight = s.nextFloat();
		float BMI = weight / (height * height);
		System.out.println("当前的BMI是：" + BMI);
		
		String state;
		
		if (BMI < 18.5)
			state = "体重过轻";
		else if (BMI >= 18.5 && BMI < 24)
			state = "正常范围";
		else if (BMI >= 24 && BMI < 27)
			state = "体重过重";
		else if (BMI >= 27 && BMI < 30)
			state = "轻度肥胖";
		else if (BMI >= 30 && BMI < 35)
			state = "中度肥胖";
		else
			state = "重度肥胖";
		
		System.out.println("身体状态是："+state);
			
	}
	
	//判断闰年
	/*
	 *闰年判断标准(满足任何一个)
	1. 如果能够被4整除，但是不能被100整除
	2. 能够被400整除
	 */
	void ifLeapYear(){
		Scanner s = new Scanner(System.in);
		System.out.println("请输入年份");
		int y = s.nextInt();
		boolean ly = false;
		
		boolean a1 = y % 4 == 0;
		boolean a2 = y % 100 != 0;
		boolean b = y% 400 == 0;
		
		if(a1 && a2)
			ly = true;
		else if (b)
			ly = true;
		
		System.out.println(y+(ly?"是闰年":"不是闰年"));
	}
	
	public static void main(String[] args) {
		MyTest mt = new MyTest();
		//mt.test1();
		//mt.test2();
		//mt.test3();
		//mt.calBMI();
		mt.ifLeapYear();
	}
	
}

package j2se;
import java.util.Scanner;
public class Hi{
	public static void main(String[] args) {
		Scanner s =new Scanner(System.in);
		System.out.println("请输入年份：");
		int a = s.nextInt();
		if ((a % 4 == 0 & a % 100 != 0) || a % 400 == 0)
			System.out.println(a+"是闰年");
		else
			System.out.println(a+"不是闰年");
	}
		
}

package j2se;
import java.util.Scanner;
public class Hi{
	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		System.out.println("请输入身高（m）：");
		float a = s.nextFloat();
		System.out.println("请输入体重（kg）：");
		int b = s.nextInt();
		float c = b/(a*a);
		System.out.println("当前的BMI是："+c);
		if (c < 18.5)
			System.out.println("体重过轻");
		else if (18.5 <= c & c< 24)
			System.out.println("正常范围");
		else if (24<= c & c< 27)
			System.out.println("体重过重");
		else if (27<= c & c< 30)
			System.out.println("轻度肥胖");
		else if (30<= c & c< 35)
			System.out.println("中度肥胖");
		else 
			System.out.println("重度肥胖");
	}
		
}

import java.util.Scanner;

public class BMI {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int weigh;
        float height, bmi;

        System.out.println("请输入身高(m):");
        height = sc.nextFloat();
        System.out.println("请输入体重(kg):");
        weigh = sc.nextInt();
        bmi = weigh / (height * height);
        System.out.println("当前的BMI是:" + bmi);

        if (bmi < 18.5) {
            System.out.println("体重过轻");
        } else if (bmi >= 18.5 && bmi < 24) {
            System.out.println("正常范围");
        } else if (bmi >= 24 && bmi < 27) {
            System.out.println("体重过重");
        } else if (bmi >= 27 && bmi < 30) {
            System.out.println("轻度肥胖");
        } else if (bmi >= 30 && bmi < 35) {
            System.out.println("中度肥胖");
        } else {
            System.out.println("重度肥胖");
        }
    }
}

import java.util.Scanner;

public class HelloWorld {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("请输入身高");
        double height = input.nextDouble();
        System.out.println("请输入体重");
        double weight = input.nextDouble();
        double Bmi = weight / (height * height);
        if (Bmi < 18.5) {
            System.out.println("您的体重过轻");
        } else if (18.5 <= Bmi &&Bmi< 24) {
            System.out.println("您的体重正常");
        } else if (24 <= Bmi&& Bmi < 27) {
            System.out.println("您体重过重");
        } else if (27 <= Bmi&& Bmi < 30) {
            System.out.println("您轻度肥胖");
        } else if (30 <= Bmi&& Bmi < 34) {
            System.out.println("您中度肥胖");
        }
        else if(34<=Bmi){
            System.out.println("您重度肥胖");
        }

    }
}

do {
            System.out.println("请输入年份：");
            Scanner s = new Scanner(System.in);
            try {
                int year = s.nextInt();
                String yearResult = "";
                if (year % 4 == 0 && year % 100 != 0)
                    yearResult = "是闰年";
                else if (year % 400 == 0)
                    yearResult = "是闰年";
                else
                    yearResult = "不是闰年";
                System.out.println(year + yearResult);
            } catch (Exception e) {
                System.out.println("请输入正确的年份格式，如1990");
            }
        }
        while (true);

import java.util.Scanner;

public class BMI {
	public static void main(String[] args){
		Scanner h = new Scanner(System.in);
		Scanner w = new Scanner(System.in);
		System.out.println("请输入身高（m）:");
		float a = h.nextFloat();
		System.out.println("请输入体重（kg）:");
		float b = w.nextFloat();
		
		float bmi = b/(a*a);
		System.out.println("当前的BMI为：" + bmi);
		if(bmi < 18.5){
			System.out.println("身体状态是：体重过轻");
		}
		else if(18.5 <= bmi  && bmi < 24){
			System.out.println("身体状态是：正常范围");
		}
		else if(24<= bmi && bmi < 27 ){
			System.out.println("身体状态是：体重过重");
		}
		else if(27<= bmi && bmi < 30){
			System.out.println("身体状态是：轻度肥胖");
		}
		else if(30<= bmi && bmi <35 ){
			System.out.println("身体状态是：中度肥胖");
		}
		else if(bmi >= 35){
			System.out.println("身体状态是：重度肥胖");
		}
	}
}

import java.util.Scanner;

public class demo6 {
public static void main(String[] args) {
	System.out.println("请输入年份");
	Scanner sc=new Scanner(System.in);
	int nian=sc.nextInt();
    if(nian%400==0||nian%100!=0&nian%4==0)
       System.out.println(nian+"是闰年"); 
    else
    	System.out.println(nian+"不是闰年");
}
}

import java.util.Scanner;

/*
 * bmi
 */
public class demo5 {
public static void main(String[] args) {
	Scanner sc=new Scanner(System.in);
   System.out.println("请输入你的身高(m)");
     float shengao=sc.nextFloat();
     System.out.println("请输入你的体重(kg)");
     float tizhong=sc.nextFloat();
     float bmi=tizhong/(shengao*shengao);
     System.out.println("当前的bmi是"+bmi);
     if(bmi<18.5){
    	 System.out.println("体重过轻");    	
     }else if(bmi>=18.5&&bmi<24){
    	 System.out.println("正常范围");
     }else if (bmi>=24&&bmi<27){
    	 System.out.println("体重过重");
     }else if (bmi>=27&&bmi<30){
    	 System.out.println("轻度肥胖");
     }else if (bmi>=30&&bmi<35){
    	 System.out.println("中度肥胖");
     }else if (35<=bmi){
    	 System.out.println("重度肥胖");
     }
  }
}

  public static void main(String[] args){
		  System.out.println("请输入你的身高:");
		int i=new Scanner(System.in).nextInt();
		System.out.println("请输入你的体重:");
           Double d=new Scanner(System.in).nextDouble();
        
            
           Double s=i/d/d;
           
           if(s>=35){
        	   System.out.println("严重肥胖");
           }else if(s<=30){
        	   System.out.println("中度肥胖");
           }else if(s<=27){
        	   System.out.println("轻度肥胖");
           }else if(s<=24){
        	   System.out.println("体重过重");
           }else if(s<=18.5){
        	   System.out.println("正常范围");
           }else if(s<18.5){
        	   System.out.println("体重过轻");
           }
           System.out.println("当前体质是:"+s);
           
           
		}
		

import java.util.Scanner;

public class test {
    public static void main(String[] args) {
    	float height = input("身高");
    	float weight = input("体重");
    	float BMI = computed(height,weight);
    	System.out.println("当前的BMI是 : "+ BMI);
    	System.out.println("身体状态是 : "+ filter(BMI));
    }
    public static float input (String str) {
    	float res;
    	Scanner s = new Scanner(System.in);
    	System.out.println("请输入 : "+str);
    	res = s.nextFloat();
		return res;
    }
    public static float computed (float height, float weight) {
    	float res;
    	res = weight / height / height;
		return res;
    }
    public static String filter (float BMI) {
    	String res = "";
    	if(BMI<18.5)
    		res = "体重过轻";
    	else if(18.5 <= BMI && BMI < 24)
    		res = "正常范围";
    	else if(24 <= BMI && BMI  < 27)
    		res = "体重过重";
    	else if(27 <= BMI && BMI  < 30)
    		res = "轻度肥胖";
    	else if(30 <= BMI && BMI  < 35)
    		res = "中度肥胖";
    	else if(35 <= BMI)
    		res = "重度肥胖";
		return res;
    }
}

public class Test_if {

	public static void main(String[] args) {
		double high;
		double weight;
		double BMI;
		
		Scanner input = new Scanner(System.in);
	
		int choice = 0;
		int outloop = 0;
		while(outloop == 0){
			System.out.println("请选择功能：");
			System.out.println("1、测试BMI指数     2、退出" + "/n");
			choice = input.nextInt();
			
			//★★ 测试BMI指数功能！
			if(choice == 1){
				System.out.print("请输入您的体重(kg)：");
				weight = input.nextDouble();
				System.out.print("请输入您的身高(M)：");
				high = input.nextDouble();
				BMI = weight/(high*high);
				System.out.println("您的BMI指数为：" + BMI);	
				
				//**判断BMI指数健康程度
				if(BMI > 18.5){
					if(BMI < 24){
						System.out.println("您的体重属于正常范围！");
					}else if(BMI < 27){
						System.out.println("您的体重有一点过重喔！");
					}else if(BMI < 30){
						System.out.println("您有点轻度肥胖呢！");
					}else if(BMI < 35){
						System.out.println("中度肥胖警告⚠！");
					}else{
						System.out.println("重度肥胖警告⚠！！");
					}
				}else{
					System.out.println("您的严重过轻！！！");
				}
			}else if(choice == 2){
				System.out.println("感谢您的使用，再见！");
				outloop = 1;
				input.close();
			}else{
				System.out.println("您的输入有误！");
			}
			System.out.println();
		}
		
	}
}

package j2se;

import java.util.Scanner;

public class HelloWorld {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner s = new Scanner(System.in);
		int year;
		System.out.println("请输入年份：");
		year = s.nextInt();
		if((year % 4 == 0 && year % 100 != 0) || year % 400 ==0)
			System.out.println(year + "是闰年！");
		else
			System.out.println(year + "不是闰年！");
		
		//三元运算符
		System.out.println((year % 4 == 0 && year % 100 != 0) || year % 400 ==0 ?
				year + "是闰年！" : year + "不是闰年！");
		
		s.close();
	}	
}

import java.util.Scanner;
public class Practice {
	public static void main(String[] args) {
		double weight;
		double height;
		Scanner s = new Scanner(System.in);
		System.out.println("请输入身高（m）：");
		height = s.nextDouble();
		System.out.println("请输入体重（Kg）：");
		weight = s.nextDouble();
		double BMI = weight/(height*height);
		System.out.println("当前的BMI值是："+BMI);
		if (BMI<18.5) {
			System.out.println("身体状态是：体重过轻");
		}else if(18.5<=BMI && BMI<24) {
			System.out.println("身体状态是：正常范围");
		}else if(BMI>=24 && BMI<27) {
			System.out.println("身体状态是：体重过重");
		}else if(BMI>=27 && BMI<30) {
			System.out.println("身体状态是：轻度肥胖");
		}else if(BMI>=30 && BMI<35) {
			System.out.println("身体状态是：中度肥胖");
		}else if(BMI>=35) {
			System.out.println("身体状态是：重度肥胖");
		}
	}
}

import java.util.Scanner;

public class Practice{
	
	public static void main(String[] args) {
		Scanner year = new Scanner(System.in);
		
		System.out.println("请输入年份：");
		int a = year.nextInt();
		
		if(a%4 == 0 && a%100 != 0 || a%400 == 0)
			System.out.println(a+"是闰年");
		
		else 
			System.out.println(a+"不是闰年");
	}
}

import java.util.Scanner;

public class Practice{
	
	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		
		System.out.println("请输入身高（m）：");
		
		float a = s.nextFloat();
		
		System.out.println("请输入体重（kg）：");
		
		float b = s.nextFloat();
		float c = b/(a*a);
		
		System.out.println("当前的BMI是："+c);
		
		if(c<18.5)
			System.out.println("体重过轻");
		else if(c>=18.5 && c<24)
			System.out.println("正常范围");
		else if(c>=24 && c<27)
			System.out.println("体重过重");
		else if(c>=27 && c<30)
			System.out.println("轻度肥胖");
		else if(c>=30 && c<35)
			System.out.println("中度肥胖");
		else if(c>=35)
			System.out.println("重度肥胖");
	}
}

import java.util.Scanner;


public class ee {
	
	    public static void main(String[] args) {
	    	System.out.println("请输入年份：");
	    	Scanner s = new Scanner(System.in);
	    	int a = s.nextInt();
	    
	    	if(a % 400 == 0){
	    		System.out.println(a + "是世纪闰年");
	    	}
	    	else if(a % 4 ==0 && a % 100 != 0){
	    		System.out.println(a + "是普通闰年");
	    	}
	    	else if(a % 4 != 0 ||  a % 100 == 0){
	    		System.out.println(a + "不是闰年");
	    	}
	  }
}

import java.util.Scanner;
/**
	 *判断某一年是否为闰年
	通过Scanner 输入一个年份，然后判断该年是否是闰年
	
	闰年判断标准(满足任何一个)
	1. 如果能够被4整除，但是不能被100整除
	2. 能够被400整除
 *
 */
public class HelloWorld{
	public static void main(String[] args){
		Scanner s = new Scanner(System.in);
		
		System.out.println("请输入年份");
		int a = s.nextInt();
		
		if (a%4==0 && a%100!=0) {
			System.out.println(a+"是闰年");
		}else if (a%400==0) {
			System.out.println(a+"是闰年");
		}else {
			System.out.println(a+"不是闰年");
		}
	}
}

import java.util.Scanner;
public class HelloWorld{
	public static void main(String[] args){
		Scanner s = new Scanner(System.in);
		
		System.out.println("请输入体重");
		int a = s.nextInt();
		
		System.out.println("请输入身高");
		float b = s.nextFloat();
		
		float bml = a/(b*b);
		System.out.println("当前的BML是："+bml);
		
		String str = "";
		if (bml<18.5 && bml>0) {
			str = "体重过轻";
		}else if (bml>=18.5 && bml<24) {
			str = "正常范围";
		}else if (bml>=24 && bml<27) {
			str = "体重过重";
		}else if (bml>=27 && bml<30) {
			str = "轻度肥胖";
		}else if (bml>=30 && bml<35) {
			str = "中度肥胖";
		}else if (bml>=35) {
			str = "重度肥胖";
		}
		System.out.println("身体状态是："+str);
	}
}

import java.util.Scanner;

public class BIM {
    public static void main(String args[]){
         float high;
         float weight;
         float bim;
        System.out.println("输入你的体重(单位kg)：");
        Scanner W=new Scanner(System.in);
        float w=W.nextFloat();

        System.out.println("输入你的身高(单位m)：");
        Scanner H=new Scanner(System.in);
        float h=H.nextFloat();

        bim=w/(h*h);
        System.out.println("当前的BIM值是："+bim);
        if(bim<18.5){
            System.out.println("体重过轻");
        }else if(bim<24&&bim>=18.5){
            System.out.println("正常范围");
        }else if(bim<27&&bim>=24){
            System.out.println("体重过重");
        }else if(bim<30&&bim>=27){
            System.out.println("轻度肥胖");
        }else if(bim<35&&bim>=30){
            System.out.println("中度肥胖");
        }else if(bim>=35){
            System.out.println("重度肥胖");
        }

    }
}

无

import java.util.Scanner;
class Runnian{
	public static void main(String[] args){
		
		Scanner s= new Scanner(System.in);
		int a=s.nextInt();
		
		if(a%4==0&&a%100!=0||a%400==0){
			
			System.out.print("yes");
			
			
		}else{
			System.out.print("no");
			
			
		};
		
	}
	
	
}

class runnian{
	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		System.out.println("请输入年份 ： ");
		int year = s.nextInt();
		if((year%4==0&&year%100!=0)||year%400==0) {
			System.out.println(year+"是闰年");
		}else {System.out.println(year+"不是闰年");}
	}
}

package 控制流程;

import java.util.Scanner;

/*
 * 判断某一年是否为闰年
通过Scanner 输入一个年份，然后判断该年是否是闰年

闰年判断标准(满足任何一个)
1. 如果能够被4整除，但是不能被100整除
2. 能够被400整除
 */
public class LeapYear {
	public static void main(String[] args) {
//		通过Scanner 输入一个年份
		System.out.println("请输入年份：");
		Scanner s=new Scanner(System.in);
		int year=s.nextInt();
		
//		判断该年是闰年
		if((year%4==0)&(year%100!=0)) {
			System.out.println(year+"年是闰年！");
		}else if(year%400==0) {
			System.out.println(year+"年是闰年！");
		}else {
			System.out.println(year+"年不是闰年！");
		}
	}
}

import java.util.Scanner;

public class HelloWorld2 {
	public static void main(String[] args) {
		 Scanner s=new Scanner(System.in);
		 int i = s.nextInt();
		 if ((i%4==0&&i%100!=0)||(i%400==0)) {
			System.out.println(i+"是闰年");
		}else {
			System.out.println(i+"不是闰年");
		}
	}
}

import java.util.Scanner;

public class HelloWorld {
	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		System.out.println("请输入身高（m）：");
		float a = s.nextFloat();
		System.out.println("请输入体重（kg）：");
		float b = s.nextFloat();
		float c = b/(a*a);
		System.out.println("当前的BMI是："+c);
		if(c<18.5)
			System.out.println("体重过轻");
		else if(c<24)
			System.out.println("正常范围");
		else if(c<27)
			System.out.println("体重过重");
		else if(c<30)
			System.out.println("轻度肥猪");
		else if(c<35)
			System.out.println("中度肥猪");
		else if(35<=c)
			System.out.println("超级肥猪");
	}
}

无

第一题:BMI值计算程序
public class HomeWork_BMI {

	// BMI计算器:
	// 使用Scanner收集你的身高体重，并计算出你的BMI值是多少BMI的计算公式是 体重(kg) / (身高*身高)

	public static void main(String[] args) {

		Scanner input = new Scanner(System.in);

		System.out.println("欢迎使用'丛雨'BMI值测量程序.");

		System.out.println("请输入您的姓名:");
		String name = input.nextLine();
		System.out.println("请输入您的身高(m):");
		float height = input.nextFloat();
		System.out.println("请输入您的体重(kg):");
		float weight = input.nextFloat();

		System.out.println("正在为您计算BMI值,请稍后......");
		System.out.println("");
		float bmi = weight / (height * height);
		System.out.println(name + "\t您当前的BMI值为:" + bmi);

		if (bmi < 18.5)
			System.out.println("您的体重过轻.");
		else if (bmi < 24)
			System.out.println("您的体重处于正常范围.");
		else if (bmi < 27)
			System.out.println("您的体重过重.");
		else if (bmi < 30)
			System.out.println("您的体重处于轻度肥胖.");
		else if (bmi < 35)
			System.out.println("您的体重处于中度肥胖.");
		else
			System.out.println("您的体重处于重度肥胖,建议您控制体重.");

	}
}


第二题:闰年程序
public class Year {

	public static void main(String[] args) {

		// 闰年计算程序
		// 判断某一年是否为闰年,通过Scanner 输入一个年份，然后判断该年是否是闰年
		// 闰年判断标准(满足任何一个)
		// 1. 如果能够被4整除，但是不能被100整除
		// 2. 能够被400整除
		Scanner input = new Scanner(System.in);

		System.out.println("欢迎使用'丛雨'闰年计算程序");
		System.out.println("请输入年份:");
		int year = input.nextInt();
		System.out.println("正在为您计算,请稍后......");

		if ((year % 4 == 0) && (year % 100 != 0) || (year % 400 == 0))
			System.out.println(year + "是闰年.");
		else
			System.out.println(year + "不是闰年.");
	}

}

import java.util.Scanner;
public class Main {	 
	    public static void main(String[] args) {
	    	Scanner sc=new Scanner(System.in);
	       System.out.println("请输入年份");
	       int i=sc.nextInt();
	       System.out.println((i%4==0&&i%100!=0)||i%400==0?i+"是闰年":i+"不是闰年");	    
    sc.close();        
	    }
	 
	}

import java.util.Scanner;
public class panDuan {
    public static void main(String[] args) {
    	System.out.println("请输入身高(m)");
    	Scanner h=new Scanner(System.in);
    	float a=h.nextFloat();
    	System.out.println("请输入体重(kg)");
    	float b=h.nextFloat();
    	float BMI=b/(a*a);
    	System.out.println("当前BMI为："+BMI);
    	if(0<BMI&&BMI<18.5) 
    	System.out.println("体重过轻");
    	else if (18.5<=BMI&&BMI<24)
    		System.out.println("体重正常");
    	else if (24<=BMI&&BMI<27)
    		System.out.println("体重过重");
    	else if (27<=BMI&&BMI<30)
    		System.out.println("轻微肥胖");
    	else if (30<=BMI&&BMI<35)
    		System.out.println("中度肥胖");
    	else if (30<=BMI)
    		System.out.println("重度肥胖");
    }
}

	  public static void main(String[] args) {
		 Scanner s=new Scanner(System.in);
		 System.out.println("enter year");
		 int year=s.nextInt();
		 if((year/4==0 & year/100!=0)||year/400==0){
			 System.out.println(year+"is 闰年");
		 }
		 else
			 System.out.println(year+"不是闰年");
		 
	        
	    }
	}

  public static void main(String[] args) {
		 Scanner s=new Scanner(System.in);
		 System.out.println("身高");
		 double height=s.nextDouble();
		 System.out.println("体重");
		 double weight=s.nextDouble();
		 double bmi=weight/(height*height);
		 System.out.println("当前的smi是"+bmi);
		 System.out.println("身体状态是：");
		 double[] BMI=new double[]{18.5,24,27,30,35};
			if(bmi<BMI[0])	
				System.out.println("体重过轻");
			if(bmi<BMI[1])	
				System.out.println("正常范围");
			if(bmi<BMI[2])	
				System.out.println("体重过重");
			if(bmi<BMI[3])	
				System.out.println("轻度肥胖");
			if(bmi<BMI[4])	
				System.out.println("中度肥胖");
			if(bmi>BMI[4])	
				System.out.println("重度肥胖");
			
		 
	        
	    }

public class Play {
	public static void main(String[] args) {
		System.out.println("请输入年份：");
		Scanner input=new Scanner(System.in);
		int year=input.nextInt();
		if(year%400==0||year%100!=0&year%4==0)
			System.out.println(year+"是闰年");
		else
			System.out.println(year+"不是闰年");
	}

}

import java.util.Scanner;
public class LeapYear {
	public static void main(String[] args){
		int year;
		Scanner scann = new Scanner(System.in);
		System.out.println("请输入年份");
		year = scann.nextInt();
		if((year%4==0&&year%100!=0)||year%400==0){
			System.out.println(year+"是闰年");
		}else{
			System.out.println(year+"不是闰年");
		}
	}
}

package com.Piggy.day7_16Evening;


import java.util.Scanner;
public class BMI {
	public static void main(String[] args) {
		
		//创建一个Scanner对象
		Scanner in = new Scanner(System.in);
		
		//打印提示输入身高的信息
		System.out.print("请输入你的身高(m)：");
		double hight = in.nextDouble();
		
		//打印提示输入体重的信息
		System.out.print("请输入你的体重(kg)：");
		double weight = in.nextDouble();
		
		//计算BMI值
		double BMI = (weight/(hight*hight));
		System.out.println(BMI);
		String str = "您的肥胖指数为：";
		if(BMI<18.5){
			System.out.println(str + "体重过轻");
		
		}else if(BMI>=18.5 && BMI<24){
			System.out.println(str+"正常范围");
		
		}else if(BMI>=24 && BMI<27){
			System.out.println(str + "体重过重");
		
		}else if(BMI>=27 && BMI<30){
			System.out.println(str + "轻度肥胖");
		
		}else if(BMI>=30 && BMI<35){
			System.out.println(str + "中度肥胖");		
			
		}else if(BMI<=35){
			System.out.println(str + "重度肥胖");
		}
		
	}

}

import java.util.Scanner;
public class IfElse {
	public static void main(String[] args) {
		//BMI判断
		float bmi;
		Scanner scan = new Scanner(System.in);
		System.out.println("请输入身高(m):");
		float height = scan.nextFloat();
		System.out.println("请输入体重(kg):");
		float kg = scan.nextFloat();
		bmi=kg/(height*height);
		System.out.println("当前的BMI是："+bmi);
		if(bmi<18.5){
			System.out.println("身体状态是：体重过轻");
		}else if(bmi>=18.5&&bmi<24){
			System.out.println("身体状态是：正常范围");
		}else if(bmi>=24&&bmi<27){
			System.out.println("身体状态是：体重过重");
		}else if(bmi>=27&&bmi<30){
			System.out.println("身体状态是：轻度肥胖");
		}else if(bmi>=30&&bmi<35){
			System.out.println("身体状态是：中度肥胖");
		}else{
			System.out.println("身体状态是：重度肥胖");
		}
	}
}

package mypro01;

import java.util.Scanner;

public class CreateItem {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		System.out.println("请输入你的身高(m)：");
		float high = s.nextFloat();
		System.out.println("请输入你的体重(kg)：");
		float weight = s.nextFloat();
		Person p = new Person(high, weight);
		float BMI=p.computeBMI();
		if (BMI >= 35) {
			System.out.println("你就是陆地巡洋舰？");
		} else if(BMI >= 30) {
			System.out.println("天启坦克");
		} else if(BMI >= 27) {
			System.out.println("坦克");
		} else if(BMI >= 24) {
			System.out.println("猪");
		}else if(BMI >= 18.5) {
			System.out.println("还阔以");
		}else {
			System.out.println("你要修仙？");
		}
	};

}

class Person {
	private float high;
	private float weight;

	public Person(float high, float weight) {
		this.high = high;
		this.weight = weight;
	}

	public float computeBMI() {
		return this.weight / this.high / this.high;
	}

}

import java.util.Scanner;
public class class5_1 {
    public static void main(String[] args){
        Scanner s = new Scanner(System.in);
        System.out.println("请输入你的身高(m):");
        double height = s.nextDouble();
        System.out.println("请输入你的体重(kg):");
        int weight = s.nextInt();
        double bim = weight / (height * height);
        System.out.println("BIM指数为：" + bim);
        if(bim < 18.5)    System.out.println("体重过轻");
        else if(bim < 24)    System.out.println("正常范围");
        else if(bim < 27)    System.out.println("体重过重");
        else if(bim < 30)    System.out.println("轻度肥胖");
        else if(bim < 35)    System.out.println("中度肥胖");
        else    System.out.println("重度肥胖");
    }
}

import java.util.Scanner;;

public class runnian{
	public static void main(String[] args) {
		Scanner a = new Scanner(System.in);
		System.out.println("请输入年份");
		int year = a.nextInt();
		if((year % 4 == 0 && year % 100 != 0)||year % 400 ==0)
			System.out.println(year + "是闰年");
		else
			System.out.println(year + "不是闰年");
		a.close();
	}
}

import java.util.Scanner;
 
public class HelloWorld {
    public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		System.out.println("请输入身高(m):");
		double a = s.nextFloat();
		System.out.println("请输入体重(kg):");
		double b = s.nextFloat();
		double c = b/(a*a);
		System.out.println("当前的BMI是:"+c);
		if (c < 18.5)
			System.out.println("体重过轻");
		else if(c >= 18.5 & c < 24)
			System.out.println("正常范围");
		else if(c >= 24 & c < 27)
			System.out.println("体重过重");
		else if(c >= 27 & c < 30)
			System.out.println("轻度肥胖");
		else if(c >= 30 & c < 35)
			System.out.println("中度肥胖");
		else
			System.out.println("重度肥胖");
		
		s.close();
	}
}

@Test
	public void test2() {
		
		Scanner s = new Scanner(System.in);
		System.out.println("请输入身高(m)：");
		float  h = s.nextFloat(); //身高
		while (h<=0 ) {
			System.out.println("输入格式错误，请重新输入");
			System.out.println("请输入身高(m)：");
			h = s.nextFloat(); //身高
		}
		System.out.println("请输入体重(Kg)：");
		float  w = s.nextFloat(); //体重
		while (w<=0) {
			System.out.println("输入格式错误，请重新输入");
			System.out.println("请输入体重(Kg)：");
			w = s.nextFloat(); //体重
		}
		//计算公式
		float BMI = w/(h*h);
		System.out.println("当前的BMI是："+BMI);
		if (0<BMI && BMI<18.5) {
			System.out.println("身体状态为:体重过轻");
		}else if (18.5<=BMI && BMI<24) {
			System.out.println("身体状态为:正常范围");
		}else if (24<=BMI && BMI<27) {
			System.out.println("身体状态为:体重过重");
		}else if (27<=BMI && BMI<30) {
			System.out.println("身体状态为:轻度肥胖");
		}else if (30<=BMI && BMI<35) {
			System.out.println("身体状态为:重度肥胖");
		}else if (35<=BMI ) {
			System.out.println("身体状态为:重度肥胖");
		}
		
	}

import java.util.*;

public class BMI {

	public float method1(float weight1, float height1) {
		float BMI = weight1 / (height1 * height1);
		return BMI;
	}

	public String method2(float BMI){
		String status = "";
		  
        if (BMI < 18.5)
            status = "体重过轻";
        else if ( BMI < 24)
            status = "正常范围";
        else if (BMI < 27)
            status = "体重过重";
        else if (BMI < 30)
            status = "轻度肥胖";
        else if (BMI < 35)
            status = "中度肥胖";
        else
            status = "重度肥胖";
        
        return status;
		
	}
	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		System.out.println("请输入身高(m):");
		float height = s.nextFloat();
		System.out.println("请输入体重(kg):");
		float weight = s.nextFloat();
		float BMI = new BMI().method1(weight, height);
		System.out.println("当前的BMI是：" + BMI);
		String status = new BMI().method2(BMI);
		System.out.println("身体状态时" + status);
	}

}

import java.util.Scanner;

public class Year {
	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		System.out.println("请输入年份：");
		int year = s.nextInt();
		
		if ((year%4 == 0 && year%100 != 0) || (year%400 == 0))
			System.out.println(year + "是闰年");
		else
			System.out.println(year + "不是闰年");
		
	}

}

		Scanner s = new Scanner(System.in);
		System.out.println("请输入年份");
		int a = s.nextInt();
		if  ( ( (a%4==0) & (a%100!=0) ) | (a%400==0) )
			System.out.println(a+"是闰年");
		else
		System.out.println(a+"不是闰年");