Here you can find the source of swapTokens(String grid[])
public static String[] swapTokens(String grid[])
//package com.java2s; /*/* w w w . j a va 2s . c o m*/ * This program developed in Java contains three versions of the class Connect4 board game: * - Connect4 * - PopOut * - Gravity * Further information about the rules and features can be found here: * http://en.wikipedia.org/wiki/Connect_Four * * Likewise, it allows users to play against other users or against a computer player. * Last but not least, it is available in both graphic and console mode. * * Copyright (C) 2015 Javier Salcedo * * 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[] swapTokens(String grid[]) { String stringBoard[] = new String[grid.length]; for (int i = 0; i < grid.length; i++) { stringBoard[i] = grid[i].replace('Y', 'R').replace('R', 'Y'); } return stringBoard; } }