Name: iaR10016 Date: 03/22/2001



The constructor FileWriter.FileWriter(File file, boolean append) works
incorrectly under Windows OS.

JavaTM 2 Platform Std. Ed. v1.4.0 reads:

...
public FileWriter(File file, boolean append) throws IOException

Constructs a FileWriter object given a File object.
If the second argument is true, then bytes will be written to
the end of the file rather than the beginning.
...

FileWriter(File file, boolean append) works correctly under Linux OS.
But under Windows bytes become written into the begining of the file
irrespective of the "append" meaning.

Failing Test:
=============
api/java_io/FileWriter/index.html#FWConstructor2Test

JCK :
=====
JCK1.3a

Test source location:
====================
/net/jdk/export/disk8/local.java/jck1.3a/JCK-runtime-13a/tests/api/java_io/FileWriter/FWCons2Test.java

Platforms:
=============
Windows

JDK, switches Info:
===================
java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b56)
Java HotSpot(TM) Client VM (build 1.4-beta-B56, mixed mode)

-hotspot -Xmixed
-server -Xmixed
-server -Xcomp

jtr file location:
==================

/net/jtgb4u4c.eng/export/sail16/results/merlin/b56/jck13a/win32/win2000_client_linux-17/workDir/api/java_io/FileWriter/index_FWConstructor2Test.jtr

How to reproduce:
====================

Compile and run the following code:

------------------------ test.java -----------------------

import java.io.*;

public class test {

    private static void fileWrite(String filePath, char i) {
        try {
            FileWriter fw = new FileWriter( filePath, true );
            fw.write(i);
            fw.close();
        }
        catch(Exception e) {
            System.out.println(e);
        }
    }

   public static void ReadFile(String filePath, boolean flg) {
        System.out.println("Reading the file:");
        char[] cbuf = new char[2];
        try {
            FileReader fr = new FileReader(filePath);
            int i=fr.read(cbuf);
            for( int j=0; j<i; j++) System.out.println(cbuf[j]);
            if (flg & i!=2) System.out.println("Text was not appended correctly!");
            fr.close();
        }
        catch(Exception e) {
            System.out.println(e);
        }
   }

    public static void main(String[] args) {
        String filePath = "TempFile.txt";
        new File(".", "TempFile.txt").delete();
        fileWrite(filePath,'1');
        ReadFile(filePath, false);
        fileWrite(filePath,'2');
        ReadFile(filePath, true);
    }

}

----------------------------------------------------------

Test output:
=============

Windows:

[H:/ira/tests] C:/jdk1.4.0/bin/java -version
java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b56)
Java HotSpot(TM) Client VM (build 1.4-beta-B56, mixed mode)
[H:/ira/tests] C:/jdk1.4.0/bin/java test
Reading the file:
1
Reading the file:
2
Text was not appended correctly!
[H:/ira/tests]

Linux:

$ /net/linux-15/export/home/jdk1.4.0/linux/bin/java -version
java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b56)
Java HotSpot(TM) Client VM (build 1.4-beta-B56, mixed mode)
$ /net/linux-15/export/home/jdk1.4.0/linux/bin/java test
Reading the file:
1
Reading the file:
1
2
$

Specific Machine Info:
=====================
Hostname: linux-16

Additional JCK related info:
============================
URL to find JCK test owners: http://javaweb.eng/jct/sqe/JCK-tck/usr/owners.jto
JCK FAQ: http://javaweb.eng/jck/usr/ConformanceTesting/JCKconformanceFaq.html

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