1/* 2 * Copyright (c) 2003, 2015, 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 4916607 27 * @summary Test casts (warning) 28 * @author gafter 29 * 30 * @compile/ref=CastWarn.out -XDrawDiagnostics -Xlint:unchecked CastWarn.java 31 */ 32 33import java.util.*; 34 35class CastWarn { 36 37 // --- Disjoint --- 38 39 private interface DA<T> { } 40 private interface DB<T> extends DA<T> { } 41 private interface DC<T> extends DA<Integer> { } 42 43 private <N extends Number, I extends Integer, R extends Runnable, S extends String> void disjointness() { 44 Object o; 45 46 // Classes 47 o = (DA<? extends Runnable>) (DA<? extends Number>) null; // <<warn 2>> 48 o = (DA<? super Integer>) (DA<? extends Number>) null; // <<warn 3>> 49 o = (DA<? super String>) (DA<? super Number>) null; // <<warn 4>> 50 51 // Typevars 52 o = (DA<? extends Integer>) (DA<N>) null; // <<warn 5>> 53 o = (DA<I>) (DA<? extends Number>) null; // <<warn 6>> 54 o = (DA<N>) (DA<? extends Integer>) null; // <<warn 7>> 55 o = (DA<N>) (DA<? extends Runnable>) null; // <<warn 8>> 56 57 o = (DA<N>) (DA<I>) null; // <<warn 9>> 58 o = (DA<N>) (DA<R>) null; // <<warn 10>> 59 60 // Raw (asymmetrical!) 61 o = (DA<Number>) (DB) null; // <<warn 11>> 62 o = (DA<? extends Number>) (DB) null; // <<warn 12>> 63 o = (DB<Number>) (DA) null; // <<warn 13>> 64 o = (DB<? extends Number>) (DA) null; // <<warn 14>> 65 } 66} 67