diff -r fd16c54261b3 -r 90ce3da70b43 jdk/test/java/util/Formatter/Flush.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/util/Formatter/Flush.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,100 @@
+/*
+ * Copyright 2004 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.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()));
+    }
+}