Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/**
 * Copyright (C) 2012 Whisper Systems
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

public class Main {
    public static String filterNumber(String number) {
        if (number == null)
            return null;

        int length = number.length();
        StringBuilder builder = new StringBuilder(length);

        for (int i = 0; i < length; i++) {
            char character = number.charAt(i);

            if (Character.isDigit(character) || character == '+')
                builder.append(character);
        }

        return builder.toString();
    }
}