| /* |
| * Copyright (c) 2001, 2005, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @compile Constants.java |
| * @bug 4397405 4826652 |
| * @summary Testing constant-ness of Double.{MIN_VALUE, MAX_VALUE}, etc. |
| * @author Joseph D. Darcy |
| */ |
| |
| public class Constants { |
| /* |
| * This compile-only test is to make sure that the primitive |
| * public static final fields in java.lang.Double are "constant |
| * expressions" as defined by "The Java Language Specification, |
| * 2nd edition" section 15.28; a different test checks the values |
| * of those fields. |
| */ |
| public static void main(String[] args) throws Exception { |
| int i = 0; |
| switch (i) { |
| case (int)Double.NaN: // 0 |
| System.out.println("Double.NaN is a constant!"); |
| break; |
| case (int)Double.MIN_VALUE + 1: // 0 + 1 |
| System.out.println("Double.MIN_VALUE is a constant!"); |
| break; |
| case (int)Double.MIN_NORMAL + 2: // 0 + 2 |
| System.out.println("Double.MIN_NORMAL is a constant!"); |
| break; |
| case Double.MIN_EXPONENT: // -1022 |
| System.out.println("Double.MIN_EXPONENT is a constant!"); |
| break; |
| case Double.MAX_EXPONENT: // 1023 |
| System.out.println("Double.MAX_EXPONENT is a constant!"); |
| break; |
| case (int)Double.MAX_VALUE - 1: // Integer.MAX_VALUE - 1 |
| System.out.println("Double.MAX_VALUE is a constant!"); |
| break; |
| case (int)Double.POSITIVE_INFINITY: // Integer.MAX_VALUE |
| System.out.println("Double.POSITIVE_INFINITY is a constant!"); |
| break; |
| case (int)Double.NEGATIVE_INFINITY: // Integer.MIN_VALUE |
| System.out.println("Double.NEGATIVE_INFINITY is a constant!"); |
| break; |
| } |
| } |
| } |