| /* |
| * Copyright (c) 2004, 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. |
| */ |
| |
| /** |
| * @test |
| * @bug 5030063 |
| * @summary Basic tests for flush(). |
| */ |
| |
| import java.io.Closeable; |
| import java.io.Flushable; |
| import java.util.Formatter; |
| import java.util.FormatterClosedException; |
| |
| public class Flush { |
| |
| private static class ExpectedException extends RuntimeException {} |
| |
| private static class F implements Appendable, Closeable, Flushable { |
| public Appendable append(CharSequence csq) { return null; } |
| public Appendable append(char c) { return null; } |
| public Appendable append(CharSequence csq, int s, int e) { |
| return null; |
| } |
| public void close() {} |
| |
| public void flush() { |
| throw new ExpectedException(); |
| } |
| } |
| |
| private static class NF implements Appendable, Closeable { |
| public Appendable append(CharSequence csq) { return null; } |
| public Appendable append(char c) { return null; } |
| public Appendable append(CharSequence csq, int s, int e) { |
| return null; |
| } |
| public void close() {} |
| |
| // method coincidentally called flush() |
| public void flush() { |
| throw new RuntimeException("NF.flush should not be called"); |
| } |
| } |
| |
| private static void test(Formatter f) { |
| if (f.out() instanceof F) { |
| // F.flush() called since F implements Flushable |
| try { |
| f.flush(); |
| throw new RuntimeException("F.flush not called"); |
| } catch (ExpectedException x) { |
| System.out.println(" F.flush called"); |
| } |
| } else { |
| // NF.flush() not called since NF does not implement Flushable |
| f.flush(); |
| } |
| |
| // Formatter is a Flushable |
| if (!(f instanceof Flushable)) |
| throw new RuntimeException("Formatter is not a Flushable"); |
| |
| // flush() after close() throws a FormatterClosedException |
| f.close(); |
| try { |
| f.flush(); |
| throw new RuntimeException("FormatterClosedException not thrown"); |
| } catch (FormatterClosedException x) { |
| System.out.println(" FormatterClosedException thrown"); |
| } |
| } |
| |
| public static void main(String [] args) { |
| System.out.println("testing Flushable"); |
| test(new Formatter(new F())); |
| System.out.println("testing non-Flushable"); |
| test(new Formatter(new NF())); |
| } |
| } |