1 /* 2 * Copyright 2004 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 */ 23 24 /* 25 * @test 26 * @bug 5030212 27 * @summary please add a typesafe cast for Class<?> types 28 * @author gafter 29 * 30 * @compile -Xlint:unchecked -Werror BasicUnit.java 31 * @run main BasicUnit 32 */ 33 34 interface Int { 35 void main(); 36 } 37 38 class MyInt implements Int { 39 public void main() { 40 System.out.println("Hello, world!"); 41 } 42 } 43 44 public class BasicUnit { 45 static <T extends Int> T factory(Class<T> c) throws Throwable { 46 return c.newInstance(); 47 } 48 public static void main(String[] args) throws Throwable { 49 factory(Class.forName("MyInt").asSubclass(Int.class)).main(); 50 } 51 }