ready() in BufferedReader results inconsistent between signed and unsigned jar

Name: nt126004 Date: 01/17/2002


FULL PRODUCT VERSION :
java version "1.4.0-beta3"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta3-b84)
Java HotSpot(TM) Client VM (build 1.4.0-beta3-b84, mixed mode)

FULL OPERATING SYSTEM VERSION :
Windows NT Version 4.0



A DESCRIPTION OF THE PROBLEM :
The problem appears when testing the BufferedReader for
ready -- normally (from the command line or from an
unsigned JAR) this returns a false flag when all records
have been read. However, when running this inside of a
signed JAR, it appears to always return true even when all
lines have been read.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Compile the source below and jar it up with a small test file
2. run Test -- it works (prints out the file)
3. Now sign the jar
4. Run Test -- it keeps reading

EXPECTED VERSUS ACTUAL BEHAVIOR :
Test should stop reading the file at the end (ready()
should return false)
When run inside a signe jard, ready() always returns true

This bug can be reproduced always.

---------- BEGIN SOURCE ----------

import java.io.*;
import java.net.*;
import java.util.*;
import javax.swing.*;

public class JarTest {


public static void main(String args[]) {

Test t = new Test();
// System.out.println("Hello from ESPRESSO");

t.readInfo();
System.exit(0);

    }

      public void readInfo() {

      String configFile = "Files/data1.txt";
      int byteCount;
      int nullCount = 0;
      String s;

try {
ClassLoader cl = this.getClass().getClassLoader();
URL fileURL = cl.getResource(configFile);
InputStreamReader in = new InputStreamReader(fileURL.openStream());
BufferedReader br = new BufferedReader(in);
while (br.ready() && nullCount < 5)
{
s = br.readLine();
System.out.println(s);
if (s == null)
{
nullCount++;
}
else
{
nullCount = 0;
}

}
in.close();
}
catch (Exception e)
{ System.out.println(e.toString()); }
}


}
---------- END SOURCE ----------

CUSTOMER WORKAROUND :
stop after repeated null lines
(Review ID: 137897)
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