下面程序运行结果为 为: ______ public class Lianxi { public static void main(String args[ ]) { for (int i=1;i<=4; i++){ switch(i) { case 2: System.out.println("B"); case 3: System.out.println("C"); break; case 1: System.out.println("A"); case 4: System.out.println("D"); break; } } }// 方法main结束 }