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