Re: Question about Character.valueOf()

[Mikael]

As far as I know there is no guarantee that valueOf returns the same object 
every time, it just gives class a chance to do it if it wants to.

----- Original Message ----- 
From: "lcj.dev" <lcj....@gmail.com>
To: "dev" <dev@harmony.apache.org>
Sent: Tuesday, November 16, 2010 2:44 PM
Subject: Question about Character.valueOf()

Hi, all
Why this may be failed for other JREs? assertSame(Character.valueOf(c), 
Character.valueOf(c)).
Thanks.

please refers to this test case for details:
package org.apache.harmony.luni.tests.java.lang;

import junit.framework.TestCase;

public class CharacterImplTest extends TestCase {

   public void test_valueOfC() {
       // test the cache range
       for (char c = '\u0000'; c < 512; c++) {
           Character e = new Character(c);
           Character a = Character.valueOf(c);
           assertEquals(e, a);

           // WARN: this assertion may not be valid on other JREs
           assertSame(Character.valueOf(c), Character.valueOf(c));
       }
       // test the rest of the chars
       for (int c = '\u0512'; c <= Character.MAX_VALUE; c++) {
           assertEquals(new Character((char) c), Character.valueOf((char) 
c));
       }
   }
}
2010-11-16



lcj.dev