Name: rmT116609 Date: 06/02/2004


FULL PRODUCT VERSION :
java version "1.5.0-beta2"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-beta2-b51)
Java HotSpot(TM) Client VM (build 1.5.0-beta2-b51, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Windows2000 SP4 Japanese Version

A DESCRIPTION OF THE PROBLEM :
The decoder of "JISAutoDetect" contains a bug.
When I tried to read from InputStreamReader which encode is "JISAutoDetect", it continues reading forever or can't read at all.
I could read perfectly when I used "Shift_JIS" encode.


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Try to execute the sample code like this.
>java ReaderTest <the file name to read>

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Shows the contents of the file.
ACTUAL -
There are 2 result.
1, When it reaches the end of the file, it starts reading from the beginning of the file and continues showing the file content forever.
2, Throws an exeption. I wrote the stack trace below.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
java.io.IOException: Underlying input stream returned zero bytes
        at sun.nio.cs.StreamDecoder$CharsetSD.readBytes(Unknown Source)
        at sun.nio.cs.StreamDecoder$CharsetSD.implRead(Unknown Source)
        at sun.nio.cs.StreamDecoder.read(Unknown Source)
        at java.io.InputStreamReader.read(Unknown Source)
        at java.io.BufferedReader.fill(Unknown Source)
        at java.io.BufferedReader.readLine(Unknown Source)
        at java.io.BufferedReader.readLine(Unknown Source)
        at ReaderTest.main(ReaderTest.java:11)

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.io.*;
public class ReaderTest {
public static void main(String[] args) {
try {
File file = new File(args[0]);
FileInputStream fis = new FileInputStream(file);
InputStreamReader isr = new InputStreamReader(fis, "JISAutoDetect");
BufferedReader reader = new BufferedReader(isr);
String line;
while((line = reader.readLine()) != null) {
System.out.println(line);
}
reader.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}

---------- END SOURCE ----------

Release Regression From : 1.4.2
The above release value was the last known release where this
bug was known to work. Since then there has been a regression.

(Incident Review ID: 275694)
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