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Oundroni
Asked: 2020-05-19 23:20:18 +0800 CST 2020-05-19 23:20:18 +0800 CST

Reverse bits in an integer in Java

  • 772

What is the best way to reverse a bit of an integer in Java? I have tried the following way although it seems inelegant to me:

    int entero = 4+2+1;

    if ((entero & 4) == 4)
        entero -= 4; 
    else
        entero += 4;

    System.out.println ("Entero con el bit 3 invertido: " + entero);
java

1 Answers

  1. Best Answer

    The usual way to invert bits is by using the binary operator xor ( ^) together with the appropriate mask . In your case:

    entero ^= 4
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