1 /* 2 * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /** 25 * @test 26 * @bug 5030064 27 * @summary Basic tests for close(). 28 */ 29 30 import java.io.Closeable; 31 import java.util.Formatter; 32 import java.util.FormatterClosedException; 33 34 public class Close { 35 36 private static class ExpectedException extends RuntimeException {} 37 38 private static class C implements Appendable, Closeable { append(CharSequence csq)39 public Appendable append(CharSequence csq) { return null; } append(char c)40 public Appendable append(char c) { return null; } append(CharSequence csq, int s, int e)41 public Appendable append(CharSequence csq, int s, int e) { 42 return null; 43 } 44 close()45 public void close() { 46 throw new ExpectedException(); 47 } 48 } 49 50 private static class NC implements Appendable { append(CharSequence csq)51 public Appendable append(CharSequence csq) { return null; } append(char c)52 public Appendable append(char c) { return null; } append(CharSequence csq, int s, int e)53 public Appendable append(CharSequence csq, int s, int e) { 54 return null; 55 } 56 57 // method coincidentally called close() close()58 public void close() { 59 throw new RuntimeException("NC.close should not be called"); 60 } 61 } 62 test(Formatter f)63 private static void test(Formatter f) { 64 if (f.out() instanceof C) { 65 // C.close() called since C implements Closeable 66 try { 67 f.close(); 68 throw new RuntimeException("C.close not called"); 69 } catch (ExpectedException x) { 70 System.out.println(" C.close called"); 71 } 72 } else { 73 // NC.close() not called since NC does not implement Closeable 74 f.close(); 75 } 76 77 // Formatter is a Closeable 78 if (!(f instanceof Closeable)) 79 throw new RuntimeException("Formatter is not a Closeable"); 80 81 // multiple close() does not throw a FormatterClosedException 82 f.close(); 83 try { 84 f.close(); 85 System.out.println(" FormatterClosedException not thrown"); 86 } catch (FormatterClosedException x) { 87 throw new RuntimeException("FormatterClosedException thrown"); 88 } 89 } 90 main(String [] args)91 public static void main(String [] args) { 92 System.out.println("testing Closeable"); 93 test(new Formatter(new C())); 94 System.out.println("testing non-Closeable"); 95 test(new Formatter(new NC())); 96 } 97 } 98