Here you can find the source of createButtonGroup(javax.swing.AbstractButton... buttons)
public static javax.swing.ButtonGroup createButtonGroup(javax.swing.AbstractButton... buttons)
//package com.java2s; /******************************************************************************* * Copyright (C) 2006-2013 AITIA International, Inc. * //from ww w. j a v a 2 s . c o m * 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/>. ******************************************************************************/ import java.awt.Dimension; public class Main { /** Creates and returns a button group from 'buttons'. */ public static javax.swing.ButtonGroup createButtonGroup(javax.swing.AbstractButton... buttons) { javax.swing.ButtonGroup bg = new javax.swing.ButtonGroup(); for (int i = 0; i < buttons.length; ++i) bg.add(buttons[i]); return bg; } /** Returns the 'sum' of the parameters (a new dimension formed from the * sum of the widths and the sum of the heights). */ public static Dimension add(Dimension a, Dimension b) { return new Dimension(a.width + b.width, a.height + b.height); } }