Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

public class Main {
    public static String decodeHexString(char[] data) {
        return new String(decodeHex(data));
    }

    public static byte[] decodeHex(char[] data) {
        int len = data.length;
        if ((len & 1) != 0) {
            return null;
        } else {
            byte[] out = new byte[len >> 1];
            int i = 0;

            for (int j = 0; j < len; ++i) {
                int f = toDigit(data[j], j) << 4;
                ++j;
                f |= toDigit(data[j], j);
                ++j;
                out[i] = (byte) (f & 255);
            }

            return out;
        }
    }

    protected static int toDigit(char ch, int index) {
        int digit = Character.digit(ch, 16);
        if (digit == -1) {
            return 0;
        } else {
            return digit;
        }
    }
}