/* * Copyright (c) 2017, 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. * */ import java.lang.annotation.Annotation; import java.lang.reflect.Field; public class FieldAnnotationsApp { @MyAnnotation(name="myField1", value="myValue1") public String myField1 = null; @MyAnnotation(name="myField2", value="myValue2") public String myField2 = null; public static void main(String args[]) throws Exception { for (int i=1; i<=2; i++) { Field field = FieldAnnotationsApp.class.getField("myField" + i); Annotation[] annotations = field.getDeclaredAnnotations(); for (Annotation anno : annotations){ if (anno instanceof MyAnnotation){ MyAnnotation myAnno = (MyAnnotation) anno; String name = myAnno.name(); String value = myAnno.value(); System.out.println("Field : " + field.getName()); System.out.println(" myAnno.name : " + name); System.out.println(" myAnno.value: " + value); if (!(name.equals("myField" + i) && value.equals("myValue" + i))) { throw new Exception("Unexpected annotation values: " + i + " = " + value); } } } } System.out.println("Field annotations are OK."); } }