for (int a = 1; a < 6; a++) { switch (a) { case 1: case 2: case 3: System.out.println("a :" + a); break; case 4: System.out.println("a :" + a); break; case 5: System.out.println("a :" + a); break; } }
switch (a) { case 1: case 2: case 3: System.out.println("Hello World!"); break; } 这样就可以了!
switch (a) {
case 1:
case 2:
case 3:
System.out.println("a :" + a);
break;
case 4:
System.out.println("a :" + a);
break;
case 5:
System.out.println("a :" + a);
break;
}
}
case 1:
case 2:
case 3:
System.out.println("Hello World!");
break;
}
这样就可以了!