Java随机产生月份

r囧r小猫 2022-06-15 08:26 233阅读 0赞

效果：（大于0则运行，小于等于0则停止运行）

do-while语句

package random;
    //do while语句
    import java.util.Scanner;
    public class Switch1 {
    	public static void main(String[] args){
    		int x=(int)(1+Math.random()*12-1+1);
    		@SuppressWarnings("resource")//取消对input的警报
    		Scanner input=new Scanner(System.in);
    		System.out.println("输入大于0的数字运行");
    		do{
    			int i=(int)(1+Math.random()*12-1+1);
    		switch(i){
    		//switch语句的判断条件只接受int，byte，char，short
    		case 1:System.out.println("January");break;
    		case 2:System.out.println("February");break;
    		case 3:System.out.println("March");break;
    		case 4:System.out.println("April");break;
    		case 5:System.out.println("May");break;
    		case 6:System.out.println("June");break;
    		case 7:System.out.println("July");break;
    		case 8:System.out.println("August");break;
    		case 9:System.out.println("September");break;
    		case 10:System.out.println("October");break;
    		case 11:System.out.println("November");break;
    		case 12:System.out.println("December");break;
    			}
    		x=input.nextInt();
    		}while (x>0);
    	if (x<=0){
    	System.out.println("请重新运行!");}
    		}
    	}

while语句

package random;
    //while语句
    import java.util.Scanner;
    public class Switch2 {
    	public static void main(String[] args){
    		int x=(int)(1+Math.random()*12-1+1);
    		@SuppressWarnings("resource")//取消对input的警报
    		Scanner input=new Scanner(System.in);
    		while(x>0){
    			int i=(int)(1+Math.random()*12-1+1);
    		switch(i){
    		//switch语句的判断条件只接受int，byte，char，short
    		case 1:System.out.println("January");break;
    		case 2:System.out.println("February");break;
    		case 3:System.out.println("March");break;
    		case 4:System.out.println("April");break;
    		case 5:System.out.println("May");break;
    		case 6:System.out.println("June");break;
    		case 7:System.out.println("July");break;
    		case 8:System.out.println("August");break;
    		case 9:System.out.println("September");break;
    		case 10:System.out.println("October");break;
    		case 11:System.out.println("November");break;
    		case 12:System.out.println("December");break;
    			}
    		System.out.print("输入大于0的数字运行");
    		x=input.nextInt();
    		}
    	if (x<=0){
    	System.out.println("请重新运行");}
    		}
    	}