Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE LICENSOR BE

public class Main {
    /**
     * Converts the given number into a char-array. If the length of the array
     * is shorter than the required exact length, the array is padded with leading
     * '0' chars. If the array is longer than the wanted length the most
     * significant digits are cut off until the array has the exact length.
     *
     * @param number The number to convert to a char array.
     * @param exactArrayLength The exact length of the returned array.
     * @return The numebr as char array, one char for each decimal digit.
     * @preconditions (exactArrayLength >= 0)
     * @postconditions (result <> null)
     *                 and (result.length == exactArrayLength)
     */
    public static char[] toCharArray(int number, int exactArrayLength) {
        char[] charArray = null;

        String numberString = Integer.toString(number);
        char[] numberChars = numberString.toCharArray();

        if (numberChars.length > exactArrayLength) {
            // cut off digits beginning at most significant digit
            charArray = new char[exactArrayLength];
            for (int i = 0; i < charArray.length; i++) {
                charArray[i] = numberChars[i];
            }
        } else if (numberChars.length < exactArrayLength) {
            // pad with '0' leading chars
            charArray = new char[exactArrayLength];
            int offset = exactArrayLength - numberChars.length;
            for (int i = 0; i < charArray.length; i++) {
                charArray[i] = (i < offset) ? '0' : numberChars[i - offset];
            }
        } else {
            charArray = numberChars;
        }

        return charArray;
    }
}