Change bits value in Byte

Question

I have some data in field type Byte ( I save eight inputs in Byte, every bit is one input ). How to change just one input in that field ( Byte) but not to lose information about

Answer 1

To set a bit use :

public final static byte setBit(byte _byte,int bitPosition,boolean bitValue)
{
    if (bitValue)
        return (byte) (_byte | (1 << bitPosition));
    return (byte) (_byte & ~(1 << bitPosition));
}

To get a bit value use :

public final static Boolean getBit(byte _byte, int bitPosition)
{
    return (_byte & (1 << bitPosition)) != 0;
}