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Posted to dev@harmony.apache.org by "Vladimir Ivanov (JIRA)" <ji...@apache.org> on 2006/02/13 10:32:46 UTC
[jira] Commented: (HARMONY-53) java.io.File.hashCode() returns
incorrect value
[ http://issues.apache.org/jira/browse/HARMONY-53?page=comments#action_12366168 ]
Vladimir Ivanov commented on HARMONY-53:
----------------------------------------
At revision 377324 it is look OK.
> java.io.File.hashCode() returns incorrect value
> -----------------------------------------------
>
> Key: HARMONY-53
> URL: http://issues.apache.org/jira/browse/HARMONY-53
> Project: Harmony
> Type: Bug
> Components: Classlib
> Environment: windows
> Reporter: Vladimir Ivanov
> Assignee: Tim Ellison
>
> java.io.File.hashCode() returns incorrect value
> j2se 1.4.2 and 1.5.0 says for the java.io.File.hashCode() method:
> 'On Microsoft Windows systems, the hash code is equal to the exclusive or of its pathname string, convered to lower case, and the decimal value 1234321.'
> Seems, that conversion to the lower case is missed.
> Code to reproduce:
> import java.io.*;
>
> public class test29 {
> public static void main(String[] args) {
> String fname = "Test file name.tst";
> File ifile = new File(fname);
> int hash = 0;
> System.out.println("fname.hashCode() ^ 1234321 = " + (fname.hashCode() ^ 1234321));
> if (System.getProperty("os.name").toLowerCase().startsWith("windows")) {
> hash = fname.toLowerCase().hashCode() ^ 1234321;
> } else {
> hash = fname.hashCode() ^ 1234321;
> }
> if (ifile.hashCode() != hash) {
> System.out.println("FAILED, hashCode is " + ifile.hashCode() + ", expected " + hash);
> } else {
> System.out.println("PASSED, hashCode is " + ifile.hashCode() + ", expected " + hash);
> }
> }
> }
> Steps to Reproduce:
> 1. Build Harmony (check-out on 2006-01-25) j2se subset as described in README.txt.
> 2. Compile test29.java using BEA 1.4 javac
> > javac -d . test29.java
> 3. Run java using compatible VM (J9)
> > java -showversion test29
> Output:
> C:\tmp\tmp17>C:\jrockit-j2sdk1.4.2_04\bin\java.exe -showversion test29
> java version "1.4.2_04"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_04-b05)
> BEA WebLogic JRockit(TM) 1.4.2_04 JVM (build ari-31788-20040616-1132-win-ia32,
> Native Threads, GC strategy: parallel)
> fname.hashCode() ^ 1234321 = -229253447
> PASSED, hashCode is -2070832487, expected -2070832487
> C:\tmp\tmp17>C:\harmony\trunk\deploy\jre\bin\java -showversion test29
> java version 1.4.2 (subset)
> (c) Copyright 1991, 2005 The Apache Software Foundation or its licensors, as app
> licable.
> fname.hashCode() ^ 1234321 = -229253447
> FAILED, hashCode is -229253447, expected -2070832487
> C:\tmp\tmp17>
> junit test:
> ------------------------ FileTest.java -------------------------------------------------
> import java.io.*;
> import junit.framework.*;
>
> public class FileTest extends TestCase {
> public static void main(String[] args) {
> junit.textui.TestRunner.run(FileTest.class);
> }
> public void testHashCode() {
> String fname = "Test file name.tst";
> File ifile = new File(fname);
> int hash = 0;
> if (System.getProperty("os.name").toLowerCase().startsWith("windows")) {
> hash = fname.toLowerCase().hashCode() ^ 1234321;
> } else {
> hash = fname.hashCode() ^ 1234321;
> }
> assertTrue("FAILED, hashCode is " + ifile.hashCode() + ", expected " + hash, ifile.hashCode() == hash);
> }
> }
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