Java tutorial
//package com.java2s; /** * Copyright (C) 2012 Just Do One More * * 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.Component; import java.awt.Container; public class Main { public static boolean findComponent(Container container, Component component) { for (Component comp : container.getComponents()) { if (comp == component) { return true; } else if (comp instanceof Container) { Container inner = (Container) comp; if (findComponent(inner, component)) { return true; } } } return false; } }