大家帮小弟我看下这段代码

大家帮我看下这段代码
int i = 1, j = -1;
switch (i) {
case 0:
j = 1;
case 1:
j = 1;
case 2:
j = 2;
default:
j = 0;
}
System.out.println("j=" + j);

What is the result?
为什么结果老是 0 呢？大家帮忙解释下，谢谢

------解决方案--------------------
int i = 1, j = -1;
switch (i) {
case 0:
j = 1;
break;
case 1:
j = 1;
break;
case 2:
j = 2;
break;
default:
j = 0;
}
System.out.println("j=" + j);

按以上的试试！