1 /* 2 * Copyright (c) 2019, 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 /* 27 * @test 28 * @bug 8222402 29 * @summary LW2 array support in javac 30 * @run main/othervm -XX:+EnableValhalla ArrayRelationsTest 31 */ 32 33 public value class ArrayRelationsTest { 34 35 int x = 42; 36 37 public static void main(String [] args) { 38 ArrayRelationsTest? [] la = new ArrayRelationsTest?[10]; 39 ArrayRelationsTest [] qa = new ArrayRelationsTest[10]; 40 boolean cce = false; 41 try { 42 qa = (ArrayRelationsTest[]) (Object []) (new String [10]); 43 } catch (ClassCastException e) { 44 cce = true; 45 } 46 if (!cce) { 47 throw new AssertionError("Missing CCE"); 48 } 49 la = qa; 50 ArrayRelationsTest?[] la2 = qa; 51 ArrayRelationsTest [] qa2 = (ArrayRelationsTest []) la2; 52 boolean npe = false; 53 try { 54 la2[0] = null; 55 } catch (NullPointerException e) { 56 npe = true; 57 } 58 if (!npe) { 59 throw new AssertionError("Missing NPE"); 60 } 61 npe = false; 62 Object [] oa = qa; 63 try { 64 oa[0] = null; 65 } catch (NullPointerException e) { 66 npe = true; 67 } 68 if (!npe) { 69 throw new AssertionError("Missing NPE"); 70 } 71 72 // round trip; 73 Object o = oa = la = qa; 74 qa = (ArrayRelationsTest[]) (la = (ArrayRelationsTest? []) (oa = (Object []) o)); 75 qa [0] = new ArrayRelationsTest(); 76 77 npe = false; 78 try { 79 la[0] = null; 80 } catch (NullPointerException e) { 81 npe = true; 82 } 83 if (!npe) { 84 throw new AssertionError("Missing NPE"); 85 } 86 87 la = new ArrayRelationsTest? [10]; 88 89 cce = false; 90 try { 91 qa = (ArrayRelationsTest[]) la; 92 } catch (ClassCastException c) { 93 cce = true; 94 } 95 if (!cce) { 96 throw new AssertionError("Unexpected CCE behavior"); 97 } 98 } 99 }