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OnJava8-Examples

operators

BitManipulation.java

BitManipulation.java 3.05 KB

// operators/BitManipulation.java
// (c)2017 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Using the bitwise operators
import java.util.*;

public class BitManipulation {
 public static void main(String[] args) {
 Random rand = new Random(47);
 int i = rand.nextInt();
 int j = rand.nextInt();
 printBinaryInt("-1", -1);
 printBinaryInt("+1", +1);
 int maxpos = 2147483647;
 printBinaryInt("maxpos", maxpos);
 int maxneg = -2147483648;
 printBinaryInt("maxneg", maxneg);
 printBinaryInt("i", i);
 printBinaryInt("~i", ~i);
 printBinaryInt("-i", -i);
 printBinaryInt("j", j);
 printBinaryInt("i & j", i & j);
 printBinaryInt("i | j", i | j);
 printBinaryInt("i ^ j", i ^ j);
 printBinaryInt("i << 5", i << 5);
 printBinaryInt("i >> 5", i >> 5);
 printBinaryInt("(~i) >> 5", (~i) >> 5);
 printBinaryInt("i >>> 5", i >>> 5);
 printBinaryInt("(~i) >>> 5", (~i) >>> 5);

long l = rand.nextLong();
 long m = rand.nextLong();
 printBinaryLong("-1L", -1L);
 printBinaryLong("+1L", +1L);
 long ll = 9223372036854775807L;
 printBinaryLong("maxpos", ll);
 long lln = -9223372036854775808L;
 printBinaryLong("maxneg", lln);
 printBinaryLong("l", l);
 printBinaryLong("~l", ~l);
 printBinaryLong("-l", -l);
 printBinaryLong("m", m);
 printBinaryLong("l & m", l & m);
 printBinaryLong("l | m", l | m);
 printBinaryLong("l ^ m", l ^ m);
 printBinaryLong("l << 5", l << 5);
 printBinaryLong("l >> 5", l >> 5);
 printBinaryLong("(~l) >> 5", (~l) >> 5);
 printBinaryLong("l >>> 5", l >>> 5);
 printBinaryLong("(~l) >>> 5", (~l) >>> 5);
 }
 static void printBinaryInt(String s, int i) {
 System.out.println(
 s + ", int: " + i + ", binary:\n " +
 Integer.toBinaryString(i));
 }
 static void printBinaryLong(String s, long l) {
 System.out.println(
 s + ", long: " + l + ", binary:\n " +
 Long.toBinaryString(l));
 }
}
/* Output: (First 32 Lines)
-1, int: -1, binary:
 11111111111111111111111111111111
+1, int: 1, binary:
 1
maxpos, int: 2147483647, binary:
 1111111111111111111111111111111
maxneg, int: -2147483648, binary:
 10000000000000000000000000000000
i, int: -1172028779, binary:
 10111010001001000100001010010101
~i, int: 1172028778, binary:
 1000101110110111011110101101010
-i, int: 1172028779, binary:
 1000101110110111011110101101011
j, int: 1717241110, binary:
 1100110010110110000010100010110
i & j, int: 570425364, binary:
 100010000000000000000000010100
i | j, int: -25213033, binary:
 11111110011111110100011110010111
i ^ j, int: -595638397, binary:
 11011100011111110100011110000011
i << 5, int: 1149784736, binary:
 1000100100010000101001010100000
i >> 5, int: -36625900, binary:
 11111101110100010010001000010100
(~i) >> 5, int: 36625899, binary:
 10001011101101110111101011
i >>> 5, int: 97591828, binary:
 101110100010010001000010100
(~i) >>> 5, int: 36625899, binary:
 10001011101101110111101011
 ...
*/

一键复制编辑原始数据按行查看历史

Bruce Eckel 提交于 2016年12月31日 09:23 +08:00 . Date change

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// operators/BitManipulation.java
// (c)2017 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Using the bitwise operators
import java.util.*;

public class BitManipulation {
 public static void main(String[] args) {
 Random rand = new Random(47);
 int i = rand.nextInt();
 int j = rand.nextInt();
 printBinaryInt("-1", -1);
 printBinaryInt("+1", +1);
 int maxpos = 2147483647;
 printBinaryInt("maxpos", maxpos);
 int maxneg = -2147483648;
 printBinaryInt("maxneg", maxneg);
 printBinaryInt("i", i);
 printBinaryInt("~i", ~i);
 printBinaryInt("-i", -i);
 printBinaryInt("j", j);
 printBinaryInt("i & j", i & j);
 printBinaryInt("i | j", i | j);
 printBinaryInt("i ^ j", i ^ j);
 printBinaryInt("i << 5", i << 5);
 printBinaryInt("i >> 5", i >> 5);
 printBinaryInt("(~i) >> 5", (~i) >> 5);
 printBinaryInt("i >>> 5", i >>> 5);
 printBinaryInt("(~i) >>> 5", (~i) >>> 5);

 long l = rand.nextLong();
 long m = rand.nextLong();
 printBinaryLong("-1L", -1L);
 printBinaryLong("+1L", +1L);
 long ll = 9223372036854775807L;
 printBinaryLong("maxpos", ll);
 long lln = -9223372036854775808L;
 printBinaryLong("maxneg", lln);
 printBinaryLong("l", l);
 printBinaryLong("~l", ~l);
 printBinaryLong("-l", -l);
 printBinaryLong("m", m);
 printBinaryLong("l & m", l & m);
 printBinaryLong("l | m", l | m);
 printBinaryLong("l ^ m", l ^ m);
 printBinaryLong("l << 5", l << 5);
 printBinaryLong("l >> 5", l >> 5);
 printBinaryLong("(~l) >> 5", (~l) >> 5);
 printBinaryLong("l >>> 5", l >>> 5);
 printBinaryLong("(~l) >>> 5", (~l) >>> 5);
 }
 static void printBinaryInt(String s, int i) {
 System.out.println(
 s + ", int: " + i + ", binary:\n " +
 Integer.toBinaryString(i));
 }
 static void printBinaryLong(String s, long l) {
 System.out.println(
 s + ", long: " + l + ", binary:\n " +
 Long.toBinaryString(l));
 }
}
/* Output: (First 32 Lines)
-1, int: -1, binary:
 11111111111111111111111111111111
+1, int: 1, binary:
 1
maxpos, int: 2147483647, binary:
 1111111111111111111111111111111
maxneg, int: -2147483648, binary:
 10000000000000000000000000000000
i, int: -1172028779, binary:
 10111010001001000100001010010101
~i, int: 1172028778, binary:
 1000101110110111011110101101010
-i, int: 1172028779, binary:
 1000101110110111011110101101011
j, int: 1717241110, binary:
 1100110010110110000010100010110
i & j, int: 570425364, binary:
 100010000000000000000000010100
i | j, int: -25213033, binary:
 11111110011111110100011110010111
i ^ j, int: -595638397, binary:
 11011100011111110100011110000011
i << 5, int: 1149784736, binary:
 1000100100010000101001010100000
i >> 5, int: -36625900, binary:
 11111101110100010010001000010100
(~i) >> 5, int: 36625899, binary:
 10001011101101110111101011
i >>> 5, int: 97591828, binary:
 101110100010010001000010100
(~i) >>> 5, int: 36625899, binary:
 10001011101101110111101011
 ...
*/