1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/test/tools/javac/mixedTarget/ExtendCovariant2.java Sat Dec 01 00:00:00 2007 +0000 1.3 @@ -0,0 +1,51 @@ 1.4 +/* 1.5 + * Copyright 2004 Sun Microsystems, Inc. All Rights Reserved. 1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 1.7 + * 1.8 + * This code is free software; you can redistribute it and/or modify it 1.9 + * under the terms of the GNU General Public License version 2 only, as 1.10 + * published by the Free Software Foundation. 1.11 + * 1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT 1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1.15 + * version 2 for more details (a copy is included in the LICENSE file that 1.16 + * accompanied this code). 1.17 + * 1.18 + * You should have received a copy of the GNU General Public License version 1.19 + * 2 along with this work; if not, write to the Free Software Foundation, 1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1.21 + * 1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or 1.24 + * have any questions. 1.25 + */ 1.26 + 1.27 +/* 1.28 + * @test 1.29 + * @bug 5009712 1.30 + * @summary 1.4 javac should not accept the Covariant Return Type 1.31 + * @author gafter 1.32 + * 1.33 + * @compile/fail -source 1.4 ExtendCovariant2.java 1.34 + * @compile -source 1.5 ExtendCovariant2.java 1.35 + */ 1.36 + 1.37 +/** 1.38 + * java.io.PrintStream java.io.PrintStream.append(char) 1.39 + * 1.40 + * overrides 1.41 + * 1.42 + * java.lang.Appendable java.lang.Appendable.append(char) 1.43 + * 1.44 + * Yet javac should allow extending PrintStream, as long as the user 1.45 + * doesn't directly override a covariant method in -source 1.4. 1.46 + **/ 1.47 +public class ExtendCovariant2 extends java.io.PrintStream { 1.48 + ExtendCovariant2() throws java.io.IOException { 1.49 + super(""); 1.50 + } 1.51 + public java.io.PrintStream append(char c) { 1.52 + return this; 1.53 + } 1.54 +}