Performing Bitwise Operations with BigInteger - Java Language Basics

Java examples for Language Basics:BigInteger

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Description

Performing Bitwise Operations with BigInteger

Demo Code

import java.math.BigInteger;

public class Main {
  public static void main(String[] argv) throws Exception {
    // A negative value
    byte[] bytes = new byte[] { (byte) 0xFF, 0x00, 0x00 }; // -65536

    // A positive value
    bytes = new byte[] { 0x1, 0x00, 0x00 }; // 65536
    BigInteger bi = new BigInteger(bytes);

    // Get the value of a bit
    boolean b = bi.testBit(3); // 0
    b = bi.testBit(16); // 1

    // Set a bit/*from   w  w w  .  j a  v a 2s. c o  m*/
    bi = bi.setBit(3);

    // Clear a bit
    bi = bi.clearBit(3);

    // Flip a bit
    bi = bi.flipBit(3);

    // Shift the bits
    bi = bi.shiftLeft(3);
    bi = bi.shiftRight(1);

    // Other bitwise operations
    bi = bi.xor(bi);
    bi = bi.and(bi);
    bi = bi.not();
    bi = bi.or(bi);
    bi = bi.andNot(bi);

    bytes = bi.toByteArray();
  }
}

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