Java tutorial
//package com.java2s; /* * This file is part of WebLookAndFeel library. * * WebLookAndFeel library 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. * * WebLookAndFeel library 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 WebLookAndFeel library. If not, see <http://www.gnu.org/licenses/>. */ import java.awt.Component; import java.awt.Container; import javax.swing.JComponent; public class Main { /** * Sets opaque state of component and all of its children. * * @param component * component to modify * @param opaque * whether opaque state or not */ public static void setOpaqueRecursively(final Component component, final boolean opaque) { setOpaqueRecursively(component, opaque, false); } /** * Sets opaque state of component and all of its children. * * @param component * component to modify * @param opaque * whether opaque state or not * @param childsOnly * whether exclude component from changes or not */ public static void setOpaqueRecursively(final Component component, final boolean opaque, final boolean childsOnly) { if (component instanceof JComponent) { final JComponent jComponent = (JComponent) component; if (!childsOnly) { jComponent.setOpaque(opaque); } } if (component instanceof Container) { for (final Component child : ((Container) component).getComponents()) { setOpaqueRecursively(child, opaque, false); } } } }