Java tutorial
/* ** Copyright (c) 1998 by Timothy Gerard Endres ** <mailto:time@ice.com> <http://www.ice.com> ** ** This program is free software. ** ** You may redistribute it and/or modify it under the terms of the GNU ** General Public License as published by the Free Software Foundation. ** Version 2 of the license should be included with this distribution in ** the file LICENSE, as well as License.html. If the license is not ** included with this distribution, you may find a copy at the FSF web ** site at 'www.gnu.org' or 'www.fsf.org', or you may write to the ** Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139 USA. ** ** THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY OF ANY KIND, ** NOT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY. THE AUTHOR ** OF THIS SOFTWARE, ASSUMES _NO_ RESPONSIBILITY FOR ANY ** CONSEQUENCE RESULTING FROM THE USE, MODIFICATION, OR ** REDISTRIBUTION OF THIS SOFTWARE. ** */ import java.io.PrintWriter; public class DebugUtilities { public static void printClassHierarchy(Class aClass, PrintWriter writer, String prefix) { String subPrefix = "-->"; for (int i = 0;; ++i) { writer.println(prefix + " " + subPrefix + " " + aClass.getName()); aClass = aClass.getSuperclass(); if (aClass == Object.class) break; subPrefix = "--" + subPrefix; } } public static void printContainerComponents(java.awt.Container cont, PrintWriter writer, String prefix, boolean recurse) { java.awt.Component[] comps = cont.getComponents(); if (comps.length < 1) { writer.println(prefix + "Contains no components."); } for (int i = 0; i < comps.length; ++i) { DebugUtilities.printClassHierarchy(comps[i].getClass(), writer, prefix + "[" + i + "]"); if (recurse) { Class c = java.awt.Container.class; if (c.isAssignableFrom(comps[i].getClass())) { DebugUtilities.printContainerComponents((java.awt.Container) comps[i], writer, (prefix + "[" + i + "] "), recurse); } } } } }