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 <T> T findChildByName(Container container, Class<T> returnType, String name) { if (name.equals(container.getName())) { return returnType.cast(container); } for (Component component : container.getComponents()) { if (name.equals(component.getName())) { return returnType.cast(component); } else if (component instanceof Container) { T recursiveResult = findChildByName((Container) component, returnType, name); if (recursiveResult != null) { return returnType.cast(recursiveResult); } } } throw new IllegalArgumentException( "Did not find child component by name [" + name + "] in the specified container!"); } }