Java Utililty Methods Bit Get

List of utility methods to do Bit Get

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Description

The list of methods to do Bit Get are organized into topic(s).

Method

intbitAt(byte b, int pos)
bit At 
int i = 1 << 7 - pos;
return (b & i & 0xFF) > 0 ? 1 : 0;
booleanbitAt(int offset, byte aByte)
Examine the values of bits within a byte. 
return (aByte & (1 << offset)) != 0;
booleanbitAt(int offset, byte aByte)
bit At 
return (aByte & (1 << offset)) != 0;
intbits(int i)
bits 
return 32 - Integer.numberOfLeadingZeros(i);
intbits(int i)
Compute the integer logarithms (ceil(log(x+1)) of a value 
return 32 - Integer.numberOfLeadingZeros(i);
intbits(int n, int offset, int length)
Bit play
http://stackoverflow.com/questions/11419501/converting-bits-in-to-integer 
n = n >> (31 - offset - length);
int mask = ~(-1 << length);
return n & mask;
Stringbits(int value, int c)
bits 
StringBuffer sb = new StringBuffer();
for (int i = c - 1; i >= 0; i--) {
    int bv = (value >>> (8 * i)) & 0xff;
    sb.append('[');
    for (int j = 7; j >= 0; j--) {
        sb.append((bv & (1 << j)) > 0 ? '1' : '0');
    sb.append(']');
...
intbits(int value, int first, int last)
Get the specified bits from the specified value. 
return (value >> last) & mask(first - last + 1);
intbits(long maxValue)
bits 
int bits = 0;
while (maxValue != 0) {
    bits++;
    maxValue >>>= 1;
return bits;
longbits(long value, int sb, int eb)
Extracts a bit range from a long value 
value >>>= eb;
sb -= eb - 1;
long mask = (1L << sb) - 1;
value &= mask;
return value;