Java Hex Calculate toHexCharFromBin(final String bin)

Description

to Hex Char From Bin

License

Open Source License

Declaration

public static char toHexCharFromBin(final String bin) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

public class Main {
    /** Allowable hex values */
    private final static String[] hexSymbols = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c",
            "d", "e", "f" };
    public final static int BITS_PER_HEX_DIGIT = 4;
    public final static int BINARY_RADIX = 2;
    public static final String BINARY_STRING_PREFIX1 = "0b";
    public static final String BINARY_STRING_PREFIX2 = "0B";

    public static char toHexCharFromBin(final String bin) {
        String bits = stripBinaryPrefix(bin);
        while (bits.length() < BITS_PER_HEX_DIGIT) {
            bits = "0" + bits;
        }//from ww  w.  j av a2  s .c  o  m

        if (bits.length() > BITS_PER_HEX_DIGIT) {
            throw new IllegalArgumentException(
                    "Input bit string \"" + bin + "\" is too long to be a hexadecimal character.");
        }

        int value = Integer.parseInt(bits, BINARY_RADIX);
        return (hexSymbols[value].charAt(0));
    }

    public static String stripBinaryPrefix(String binSymbols) {
        if (binSymbols.startsWith(BINARY_STRING_PREFIX1)) {
            binSymbols = binSymbols.substring(BINARY_STRING_PREFIX1.length());
        } else if (binSymbols.startsWith(BINARY_STRING_PREFIX2)) {
            binSymbols = binSymbols.substring(BINARY_STRING_PREFIX2.length());
        }

        return (binSymbols);
    }
}

Related

1. toHexChar(int i)
2. toHexChar(int nibble)
3. toHexChar(int paramInt)
4. toHexChar(int value)
5. toHexCharArray(byte[] input)
6. toHexChars(byte[] bs)
7. toHexChars(byte[] bytes)
8. toHexChars(final int b)
9. toHexDec(byte[] bytes)