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 Float.{MIN_VALUE, MAX_VALUE}, etc. 29 * @author Joseph D. Darcy 30 */ 31 package test.java.lang.Float; 32 33 public class ConstantsTest { 34 /* 35 * This compile-only test is to make sure that the primitive 36 * public static final fields in java.lang.Float are "constant 37 * expressions" as defined by "The Java Language Specification, 38 * 2nd edition" section 15.28; a different test checks the values 39 * of those fields. 40 */ testPublicStaticFinalFields_areConstantExpressions()41 public void testPublicStaticFinalFields_areConstantExpressions() throws Exception { 42 int i = 0; 43 switch (i) { 44 case (int)Float.NaN: // 0 45 System.out.println("Float.NaN is a constant!"); 46 break; 47 case (int)Float.MIN_VALUE + 1: // 0 + 1 48 System.out.println("Float.MIN_VALUE is a constant!"); 49 break; 50 case (int)Float.MIN_NORMAL + 2: // 0 + 2 51 System.out.println("Float.MIN_NORMAL is a constant!"); 52 break; 53 case Float.MIN_EXPONENT: // -126 54 System.out.println("Float.MIN_EXPONENT is a constant!"); 55 break; 56 case Float.MAX_EXPONENT: // 127 57 System.out.println("Float.MAX_EXPONENT is a constant!"); 58 break; 59 case (int)Float.MAX_VALUE - 1: // Integer.MAX_VALUE - 1 60 System.out.println("Float.MAX_VALUE is a constant!"); 61 break; 62 case (int)Float.POSITIVE_INFINITY: // Integer.MAX_VALUE 63 System.out.println("Float.POSITIVE_INFINITY is a constant!"); 64 break; 65 case (int)Float.NEGATIVE_INFINITY: // Integer.MIN_VALUE 66 System.out.println("Float.NEGATIVE_INFINITY is a constant!"); 67 break; 68 } 69 } 70 } 71