Here you can find the source of setPrefferedWidth(JComponent c, int w)
public static void setPrefferedWidth(JComponent c, int w)
//package com.java2s; /*/*from w ww . ja va2s .co m*/ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. * * Copyright 2011 OpenConcerto, by ILM Informatique. All rights reserved. * * The contents of this file are subject to the terms of the GNU General Public License Version 3 * only ("GPL"). You may not use this file except in compliance with the License. You can obtain a * copy of the License at http://www.gnu.org/licenses/gpl-3.0.html See the License for the specific * language governing permissions and limitations under the License. * * When distributing the software, include this License Header Notice in each file. */ import java.awt.Dimension; import javax.swing.JComponent; public class Main { public static void setPrefferedWidth(JComponent c, int w) { c.setPreferredSize(new Dimension(w, (int) c.getPreferredSize() .getHeight())); } }