switch 中嵌套for循环

Question

如下代码为何还会执行for循环，明明for循环在case 30里面呀？
public class Test {
public static void main(String args[]){
int x = 40;

  switch( x ){

     case 10:
     System.out.print("Value of X is 10");
     break;

     case 20:

     System.out.print("Value of X is 20");
     break;

     case 30:
     System.out.println("Value of X is 30");

     for(;x<=50;){
     x++;
     }
     //break;

     case 40:
     System.out.println("Value of X is 40");
     //break;

     case 50:
     System.out.println("Value of X is 50");
     //break;


     default:
     System.out.println("这是 default 语句");

    }

 System.out.print("x=" + x);

}
}

Answer 1

我复制你的代码之后的运行结果，case 30: 并没有执行

 Value of X is 40
Value of X is 50
这是 default 语句
x=40请按任意键继续. . .