Java随机产生月份

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");}
		}
	}