Java examples for Reflection:Property
Finds a property descriptor for the class that matches the property name.
/*// w w w .j ava2s. c o m * Copyright (c) 2003, 2008, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ //package com.java2s; import java.beans.IntrospectionException; import java.beans.Introspector; import java.beans.PropertyDescriptor; public class Main { public static void main(String[] argv) throws Exception { Class type = String.class; String name = "java2s.com"; System.out.println(findPropertyDescriptor(type, name)); } /** * Finds a property descriptor for the class * that matches the property name. * * @param type the class to introspect * @param name the name of the property to search * @return the {@code PropertyDescriptor}, {@code IndexedPropertyDescriptor} or {@code null} */ public static PropertyDescriptor findPropertyDescriptor(Class type, String name) { PropertyDescriptor[] pds = getPropertyDescriptors(type); for (PropertyDescriptor pd : pds) { if (pd.getName().equals(name)) { return pd; } } return null; } /** * Returns an array of property descriptors for specified class. * * @param type the class to introspect * @return an array of property descriptors */ public static PropertyDescriptor[] getPropertyDescriptors(Class type) { try { return Introspector.getBeanInfo(type).getPropertyDescriptors(); } catch (IntrospectionException exception) { throw new Error("unexpected exception", exception); } } }