switch的用法

public final class A {
    public void mySwitch(int type){
        switch(type){
        case 1:
            System.out.println(1);
        default:
            System.out.println(type);
        case 2:
            System.out.println(2);
        case 3:
            System.out.println(3);
        }
    }
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        new A().mySwitch(4);
    }

}

4
2
3