1 /*
   2  * Copyright (c) 2009, 2018, 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  * @bug 6807702
  27  * @summary Basic test for Integer.valueOf
  28  * @run main ValueOf
  29  * @run main/othervm -esa -XX:+EliminateAutoBox -XX:AutoBoxCacheMax=20000 ValueOf
  30  */
  31 
  32 public class ValueOf {
  33 
  34     // test Integer.valueOf over this range (inclusive)
  35     private static final int TEST_LOW  = -1024;
  36     private static final int TEST_HIGH = 24576;
  37 
  38     public static void main(String[] args) {
  39         int i = TEST_LOW;
  40         while (i <= TEST_HIGH) {
  41             // check that valueOf stores i
  42             if (Integer.valueOf(i).intValue() != i)
  43                 throw new RuntimeException();
  44 
  45             // check that the same object is returned for integral values
  46             // in the range -128 to 127 (inclusive)
  47             if (i >= -128 && i <= 127) {
  48                 if (Integer.valueOf(i) != Integer.valueOf(i))
  49                     throw new RuntimeException();
  50             }
  51 
  52             i++;
  53         }
  54     }
  55 }