Here you can find the source of assertValid(int piece)
public static void assertValid(int piece)
//package com.java2s; /**//from w w w .j a va2s . co m * Decaf/Decaffeinate ICS server interface * Copyright (C) 2008 Carson Day (carsonday@gmail.com) * * 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 void assertValid(int piece) { if (!isValid(piece)) { throw new IllegalArgumentException("Invalid piece: " + piece); } } public static boolean isValid(int piece) { return piece >= 0 && piece < 13; } }