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Java Source | 2000-05-25 | 4.3 KB | 119 lines |
- //: BitManipulation.java
- //////////////////////////////////////////////////
- // Copyright (c) Bruce Eckel, 1998
- // Source code file from the book "Thinking in Java"
- // All rights reserved EXCEPT as allowed by the
- // following statements: You can freely use this file
- // for your own work (personal or commercial),
- // including modifications and distribution in
- // executable form only. Permission is granted to use
- // this file in classroom situations, including its
- // use in presentation materials, as long as the book
- // "Thinking in Java" is cited as the source.
- // Except in classroom situations, you cannot copy
- // and distribute this code; instead, the sole
- // distribution point is http://www.BruceEckel.com
- // (and official mirror sites) where it is
- // freely available. You cannot remove this
- // copyright and notice. You cannot distribute
- // modified versions of the source code in this
- // package. You cannot use this file in printed
- // media without the express permission of the
- // author. Bruce Eckel makes no representation about
- // the suitability of this software for any purpose.
- // It is provided "as is" without express or implied
- // warranty of any kind, including any implied
- // warranty of merchantability, fitness for a
- // particular purpose or non-infringement. The entire
- // risk as to the quality and performance of the
- // software is with you. Bruce Eckel and the
- // publisher shall not be liable for any damages
- // suffered by you or any third party as a result of
- // using or distributing software. In no event will
- // Bruce Eckel or the publisher be liable for any
- // lost revenue, profit, or data, or for direct,
- // indirect, special, consequential, incidental, or
- // punitive damages, however caused and regardless of
- // the theory of liability, arising out of the use of
- // or inability to use software, even if Bruce Eckel
- // and the publisher have been advised of the
- // possibility of such damages. Should the software
- // prove defective, you assume the cost of all
- // necessary servicing, repair, or correction. If you
- // think you've found an error, please email all
- // modified files with clearly commented changes to:
- // Bruce@EckelObjects.com. (Please use the same
- // address for non-code errors found in the book.)
- /////////////////////////////////////////////////
-
- // Using the bitwise operators
- import java.util.*;
-
- public class BitManipulation {
- public static void main(String[] args) {
- Random rand = new Random();
- int i = rand.nextInt();
- int j = rand.nextInt();
- pBinInt("-1", -1);
- pBinInt("+1", +1);
- int maxpos = 2147483647;
- pBinInt("maxpos", maxpos);
- int maxneg = -2147483648;
- pBinInt("maxneg", maxneg);
- pBinInt("i", i);
- pBinInt("~i", ~i);
- pBinInt("-i", -i);
- pBinInt("j", j);
- pBinInt("i & j", i & j);
- pBinInt("i | j", i | j);
- pBinInt("i ^ j", i ^ j);
- pBinInt("i << 5", i << 5);
- pBinInt("i >> 5", i >> 5);
- pBinInt("(~i) >> 5", (~i) >> 5);
- pBinInt("i >>> 5", i >>> 5);
- pBinInt("(~i) >>> 5", (~i) >>> 5);
-
- long l = rand.nextLong();
- long m = rand.nextLong();
- pBinLong("-1L", -1L);
- pBinLong("+1L", +1L);
- long ll = 9223372036854775807L;
- pBinLong("maxpos", ll);
- long lln = -9223372036854775808L;
- pBinLong("maxneg", lln);
- pBinLong("l", l);
- pBinLong("~l", ~l);
- pBinLong("-l", -l);
- pBinLong("m", m);
- pBinLong("l & m", l & m);
- pBinLong("l | m", l | m);
- pBinLong("l ^ m", l ^ m);
- pBinLong("l << 5", l << 5);
- pBinLong("l >> 5", l >> 5);
- pBinLong("(~l) >> 5", (~l) >> 5);
- pBinLong("l >>> 5", l >>> 5);
- pBinLong("(~l) >>> 5", (~l) >>> 5);
- }
- static void pBinInt(String s, int i) {
- System.out.println(
- s + ", int: " + i + ", binary: ");
- System.out.print(" ");
- for(int j = 31; j >=0; j--)
- if(((1 << j) & i) != 0)
- System.out.print("1");
- else
- System.out.print("0");
- System.out.println();
- }
- static void pBinLong(String s, long l) {
- System.out.println(
- s + ", long: " + l + ", binary: ");
- System.out.print(" ");
- for(int i = 63; i >=0; i--)
- if(((1L << i) & l) != 0)
- System.out.print("1");
- else
- System.out.print("0");
- System.out.println();
- }
- } ///:~