Java中移位k位，这里k很大

对于一个由w位组成的数据类型，如果要移动k>=w位会得到什么结果？

public class Main {
    public static void main(String[] args) {
        int a1 = 0x12345678;
        a1=a1<<32;
        System.out.println("0x12345678<<32 = 0x"+ Integer.toHexString(a1));
        int a2 = 0x12345678;
        a2=a2<<36;
        System.out.println("0x12345678<<36 = 0x"+Integer.toHexString(a2));
        int a3 = 0x12345678;
        a3=a3<<40;
        System.out.println("0x12345678<<40 = 0x"+Integer.toHexString(a3));
    }
}

　　结果为

 

 移位量通过k mod w得到