为什么1>>32==1?

java版本“1.6.0\u 0” OpenJDK运行时环境(IcedTea6 1.4.1)(6b14-1.4.1-0ubuntu13) OpenJDK 64位服务器虚拟机(内部版本14.0-b08,混合模式)

class Tmp {
    public static void main(String[] args) {
        System.out.println("1>>1 = "+(1>>1));
        System.out.println("1>>2 = "+(1>>2));
        System.out.println("1>>31 = "+(1>>31));
        System.out.println("1>>32 = "+(1>>32));
        System.out.println("1>>33 = "+(1>>33));
    }
}

运行时生成:

1>>1 = 0
1>>2 = 0
1>>31 = 0
1>>32 = 1 <---------- should be 0 i think
1>>33 = 0

我需要写我自己的右班来检查这个吗?