Java Integer to intToLengthHexByte(int args, int hexLength)

Description

int To Length Hex Byte

License

Apache License

Declaration

public static byte[] intToLengthHexByte(int args, int hexLength) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

public class Main {

    public static byte[] intToLengthHexByte(int args, int hexLength) {
        String s = Integer.toHexString(args);
        //      if (s.length() % 2 != 0) {
        //         s = "0" + s;
        //      }
        byte[] re = hexToLengthHexByte(s);
        if (s.length() >= hexLength * 2) {
            return re;
        } else {/* www .j  av  a2 s.  com*/
            byte[] newb = new byte[hexLength];
            System.arraycopy(re, 0, newb, hexLength - re.length, re.length);
            return newb;
        }
    }

    public static byte[] intToLengthHexByte(Long args, int hexLength) {
        String s = Long.toHexString(args);
        //      if (s.length() % 2 != 0) {
        //         s = "0" + s;
        //      }
        byte[] re = hexToLengthHexByte(s);
        if (s.length() >= hexLength * 2) {
            return re;
        } else {
            byte[] newb = new byte[hexLength];
            System.arraycopy(re, 0, newb, hexLength - re.length, re.length);
            return newb;
        }
    }

    public static byte[] hexToLengthHexByte(String hexString) {
        if (hexString == null || "".equalsIgnoreCase(hexString)) {
            return null;
        }
        StringBuffer str = new StringBuffer();
        if (hexString.length() % 2 != 0) {
            str.append("0");
        }
        str.append(hexString);
        hexString = str.toString().toUpperCase();
        int length = hexString.length() / 2;
        char[] hexChars = hexString.toCharArray();
        byte[] d = new byte[length];
        for (int i = 0; i < length; i++) {
            int pos = i * 2;
            d[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1]));
        }
        return d;
    }

    private static byte charToByte(char c) {
        return (byte) "0123456789ABCDEF".indexOf(c);
    }
}

Related

1. intToFourChars(int value)
2. intToGoodBadSimple(int i)
3. intToID(int ID)
4. intToInteger(int[] array)
5. intToIntegerArray(int[] array)
6. intToLetter(int index)
7. intToLex(int v)
8. intToLittleEndian(int val)
9. intToLittleEndian(int value)