1 /*
   2  * Copyright 2006 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  20  * CA 95054 USA or visit www.sun.com if you need additional information or
  21  * have any questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 4136371 5017980 6576055
  27  * @summary Test Integer.decode method
  28  * @author madbot
  29  * @author Joseph D. Darcy
  30  */
  31 
  32 /**
  33  * There are six methods in java.lang.Integer which transform strings
  34  * into an int or Integer value:
  35  *
  36  * public Integer(String s)
  37  * public static Integer decode(String nm)
  38  * public static int parseInteger(String s, int radix)
  39  * public static int parseInteger(String s)
  40  * public static Integer valueOf(String s, int radix)
  41  * public static Integer valueOf(String s)
  42  *
  43  * The other five methods are tested elsewhere.
  44  */
  45 public class Decode {
  46 
  47     private static void check(String val, int expected) {
  48         int n = (Integer.decode(val)).intValue();
  49         if (n != expected)
  50             throw new RuntimeException("Integer.decode failed. String:" +
  51                                                 val + " Result:" + n);
  52     }
  53 
  54     private static void checkFailure(String val, String message) {
  55         try {
  56             int n = (Integer.decode(val)).intValue();
  57             throw new RuntimeException(message);
  58         } catch (NumberFormatException e) { /* Okay */}
  59     }
  60 
  61     public static void main(String[] args) throws Exception {
  62         check(new String(""+Integer.MIN_VALUE), Integer.MIN_VALUE);
  63         check(new String(""+Integer.MAX_VALUE), Integer.MAX_VALUE);
  64 
  65         check("10",   10);
  66         check("0x10", 16);
  67         check("0X10", 16);
  68         check("010",  8);
  69         check("#10",  16);
  70 
  71         check("+10",   10);
  72         check("+0x10", 16);
  73         check("+0X10", 16);
  74         check("+010",  8);
  75         check("+#10",  16);
  76 
  77         check("-10",   -10);
  78         check("-0x10", -16);
  79         check("-0X10", -16);
  80         check("-010",  -8);
  81         check("-#10",  -16);
  82 
  83         check(Long.toString(Integer.MIN_VALUE), Integer.MIN_VALUE);
  84         check(Long.toString(Integer.MAX_VALUE), Integer.MAX_VALUE);
  85 
  86         checkFailure("0x-10",   "Integer.decode allows negative sign in wrong position.");
  87         checkFailure("0x+10",   "Integer.decode allows positive sign in wrong position.");
  88 
  89         checkFailure("+",       "Raw plus sign allowed.");
  90         checkFailure("-",       "Raw minus sign allowed.");
  91 
  92         checkFailure(Long.toString((long)Integer.MIN_VALUE - 1L), "Out of range");
  93         checkFailure(Long.toString((long)Integer.MAX_VALUE + 1L), "Out of range");
  94 
  95         checkFailure("", "Empty String");
  96 
  97         try {
  98             Integer.decode(null);
  99             throw new RuntimeException("Integer.decode(null) expected to throw NPE");
 100         } catch (NullPointerException npe) {/* Okay */}
 101     }
 102 }