Java Utililty Methods Binary Encode

List of utility methods to do Binary Encode

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Description

The list of methods to do Binary Encode are organized into topic(s).

Method

StringtoBinary(long l, int bits)
to Binary 
StringBuilder buffer = new StringBuilder(bits);
for (int i = 0; i < bits; i++) {
    buffer.insert(0, l & 1);
    l >>>= 1;
return buffer.toString();
char[]toBinary(long v, int len)
to Binary 
char[] cs = new char[len];
for (int i = 0; i < len; i++) {
    cs[i] = (v >> (len - i - 1) & 1) != 0 ? '1' : '0';
return cs;
StringtoBinary(short value)
to Binary 
return String.format("%16s", Integer.toString(value & 0xFFFF, 2)).replace(' ', '0');
StringtoBinaryAddress(int index, int maxIndex)
Returns index as a binary string. 
int digits = Math.max(32 - Integer.numberOfLeadingZeros(maxIndex), 1);
char[] buffer = new char[digits];
int mask = 1;
for (int i = digits - 1; i >= 0; i--) {
    buffer[i] = (index & mask) != 0 ? '1' : '0';
    mask <<= 1;
return new String(buffer);
...
boolean[]toBinaryArray(int input, int length)
Returns an integer converted to a binary array. 
boolean[] bits = new boolean[length];
for (int i = length - 1; i >= 0; i--) {
    bits[i] = (input & (1 << i)) != 0;
return bits;
boolean[]toBinaryArray(int integer, int size)
Converts an integer to a binary array with a specified max size input: 11, output: [1011] 
boolean[] b = new boolean[size];
String s = Integer.toBinaryString(integer);
if (s.length() > b.length)
    s = s.substring(s.length() - b.length);
for (int i = s.length() - 1; i >= 0; i--)
    b[s.length() - 1 - i] = (s.charAt(i) == '1');
return b;
byte[]toBinaryBoolean(boolean source)
to Binary Boolean 
return new byte[] { (byte) (source ? 0x01 : 0x00) };
chartoBinaryChar(boolean bit)
to Binary Char 
return bit ? '1' : '0';
StringtoBinaryClassName(String fileName)
Converts a class's file name to a binary name. 
if (fileName.startsWith("/")) {
    fileName = fileName.substring(1);
if (fileName.endsWith(".class")) {
    fileName = fileName.substring(0, fileName.length() - 6);
fileName = fileName.replace("/", ".");
return fileName;
...
bytetoBinaryFromHex(byte ch)
Takes a ASCII digit in the range A-F0-9 and returns the corresponding integer/ordinal value. 
if (ch >= 'A' && ch <= 'F')
    return (byte) ((byte) 10 + (byte) (ch - 'A'));
return (byte) (ch - '0');