java中"<<"">>"">>>"等左移右移符号剖析

java中"<<",">>",">>>"等左移右移符号辨析

java中有以下移位运算规则:

"<<":带符号左移，向左移动n位，向低位添加0，如下图所示

public class Test {public static void main(String[] args) {byte a = -1;System.out.println(Integer.toBinaryString(a));a >>= 2;//a右移两位System.out.println(Integer.toBinaryString(a));short b = -1;System.out.println(Integer.toBinaryString(b));b >>>= 2;//a右移两位System.out.println(Integer.toBinaryString(b));}}/* * 结果如下：(都是按照int型处理) * 11111111111111111111111111111111 * 11111111111111111111111111111111 * 11111111111111111111111111111111 * 11111111111111111111111111111111 * */