public class URShift {
    public static void main(String[] args) {
        int i = -1;
        i >>>= 10;
        System.out.println(i);
        long l = -1;
        l >>>= 10;
        System.out.println(l);
        short s = -1;
        s >>>= 10;
        System.out.println(s);
        byte b = -1;
        b >>>= 10;
        System.out.println(b);
        }
        } ///:~
谁能告诉我一下，这段代码运行的过程和原因啊