Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

public class Main {
    public static String encodeByteAlign(int number) {
        return binaryToHex(appendAdditionalZeroOrOne(appendZeros(convertToBinary(number))));
    }

    public static String binaryToHex(String binaryNum) {
        StringBuffer result = new StringBuffer();
        StringBuffer temp;
        int current = 0;
        while (current < binaryNum.length()) {
            temp = new StringBuffer();
            for (int i = current; i < (current + 4); i++) {
                temp.append(binaryNum.charAt(i));
            }
            result.append(binaryBlockOf4ToHex(temp.toString()));
            current += 4;
        }
        return result.toString();
    }

    public static String appendAdditionalZeroOrOne(String binaryNum) {
        StringBuffer sb = new StringBuffer();
        int current = 0;
        while (current < binaryNum.length()) {
            if ((binaryNum.length() - current) > 7) {
                sb.append(0);
            } else {
                sb.append(1);
            }
            for (int i = current; i < (current + 7); i++) {
                sb.append(binaryNum.charAt(i));
            }
            current += 7;
        }
        return sb.toString();
    }

    public static String appendZeros(String binaryNum) {
        int len = binaryNum.length();
        if (len % 7 == 0) {
            return binaryNum;
        } else {
            int remainingDiff = (len % 7);
            int diff = 7 - remainingDiff;
            StringBuffer sb = new StringBuffer();
            for (int i = 0; i < diff; i++) {
                sb.append(0);
            }
            sb.append(binaryNum);
            return sb.toString();
        }
    }

    public static String convertToBinary(int num) {
        return Integer.toBinaryString(num);
    }

    public static char binaryBlockOf4ToHex(String input) {
        int sum = 0;
        int first = (input.charAt(0) - 48) * 8;
        int second = (input.charAt(1) - 48) * 4;
        int third = (input.charAt(2) - 48) * 2;
        int fourth = (input.charAt(3) - 48);
        sum = first + second + third + fourth;
        if (sum == 10)
            return 'A';
        else if (sum == 11)
            return 'B';
        else if (sum == 12)
            return 'C';
        else if (sum == 13)
            return 'D';
        else if (sum == 14)
            return 'E';
        else if (sum == 15)
            return 'F';
        else
            return (char) (sum + 48);
    }
}