1 /* 2 * Copyright (c) 2001, 2005, 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 package test.java.lang.Double; 25 26 /* 27 * @test 28 * @compile Constants.java 29 * @bug 4397405 4826652 30 * @summary Testing constant-ness of Double.{MIN_VALUE, MAX_VALUE}, etc. 31 * @author Joseph D. Darcy 32 */ 33 34 public class Constants { 35 /* 36 * This compile-only test is to make sure that the primitive 37 * public static final fields in java.lang.Double are "constant 38 * expressions" as defined by "The Java Language Specification, 39 * 2nd edition" section 15.28; a different test checks the values 40 * of those fields. 41 */ main(String[] args)42 public static void main(String[] args) throws Exception { 43 int i = 0; 44 switch (i) { 45 case (int)Double.NaN: // 0 46 System.out.println("Double.NaN is a constant!"); 47 break; 48 case (int)Double.MIN_VALUE + 1: // 0 + 1 49 System.out.println("Double.MIN_VALUE is a constant!"); 50 break; 51 case (int)Double.MIN_NORMAL + 2: // 0 + 2 52 System.out.println("Double.MIN_NORMAL is a constant!"); 53 break; 54 case Double.MIN_EXPONENT: // -1022 55 System.out.println("Double.MIN_EXPONENT is a constant!"); 56 break; 57 case Double.MAX_EXPONENT: // 1023 58 System.out.println("Double.MAX_EXPONENT is a constant!"); 59 break; 60 case (int)Double.MAX_VALUE - 1: // Integer.MAX_VALUE - 1 61 System.out.println("Double.MAX_VALUE is a constant!"); 62 break; 63 case (int)Double.POSITIVE_INFINITY: // Integer.MAX_VALUE 64 System.out.println("Double.POSITIVE_INFINITY is a constant!"); 65 break; 66 case (int)Double.NEGATIVE_INFINITY: // Integer.MIN_VALUE 67 System.out.println("Double.NEGATIVE_INFINITY is a constant!"); 68 break; 69 } 70 } 71 } 72