java的移位运算

public class ShiftOperate {
/** * overview： * * @Title: main * @param args * void * @author linfenliang */ public static void main(String[] args) { // TODO Auto-generated method stub// /**// * byte a = 27;// 转换成int为 00000000000000000000000000011011 byte b =// * -1;转换成int为 11111111111111111111111111111111// * // * int g = a >> 1;// 有符号右移1位，左侧缺的位以符号位补齐，正数就是0，// * "00000000000000000000000000001101" = 13 int f = b>> 1; //// * 有符号右移1位，左侧缺的位以符号位补齐，负数就是1， “11111111111111111111111111111111”= -1// * // * 故此时打印出来，g=13，gf=-1。// * // * // * // * g = a >>> 1;// 无符号右移1位，左侧缺的位以0补齐， "00000000000000000000000000001101"// * = 13 f = b>>> 1; // 无符号右移1位，左侧缺的位以0补齐，// * “01111111111111111111111111111111”= 2147483647// * // * 故此时打印出来，g=13，gf=2147483647。// * // * f = b<< 1; // 无符号左移1位，右侧缺的位以0补齐， “10000000000000000000000000000010“=// * -2 故此时打印出来，f= -2// */// int a = 27,b=-1;// System.out.println(Integer.toBinaryString(a));// System.out.println(Integer.toBinaryString(b));// System.out.println("------------");// System.out.println(a);// System.out.println(a+">>1(带符号右移一位)："+(a>>1));// System.out.println(a+">>>1(无符号右移一位)："+(a>>>1));// System.out.println(a+"<<1(左移一位)："+(a<<1));// System.out.println("------------");// System.out.println(b);// System.out.println(b+">>1(带符号右移一位)："+(b>>1));// System.out.println(b+">>>1(无符号右移一位)："+(b>>>1));// System.out.println(b+"<<1(左移一位)："+(b<<1)); int x = 42; String strX = Integer.toBinaryString(x); System.out.println("对"+strX+"按位非NOT~==>"+Integer.toBinaryString(~x)); int y = 15; String strY = Integer.toBinaryString(y); System.out.println("对"+strX+"和"+strY+"按位与AND&==>"+Integer.toBinaryString(x & y)); System.out.println("对"+strX+"和"+strY+"按位或OR|==>"+Integer.toBinaryString(x | y)); System.out.println("对"+strX+"和"+strY+"按位异或XOR^==>"+Integer.toBinaryString(x ^ y)); byte b = 64; System.out.println(b<<2); System.out.println((byte)(b<<2)); char hex[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; byte b2 = (byte) 0xf1; System.out.println(Integer.toBinaryString(0x0f)+":"+Integer.toBinaryString(0x0f1)+":"+(Integer.toBinaryString(0xf1&0x0f))); System.out.println("b = 0x" + hex[(b2 >> 4) & 0x0f] + hex[b2 & 0x0f]); System.out.println(Integer.toBinaryString(-2)+"---"+Integer.toBinaryString(-2>>>28)); System.out.println(0xFF); }
}