Name: gm110360 Date: 11/08/2002


FULL PRODUCT VERSION :
java version "1.4.1"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1-b21)
Java HotSpot(TM) Client VM (build 1.4.1-b21, mixed mode)

FULL OPERATING SYSTEM VERSION :
RedHat Linux 7.3
 
Note: this bug can be reproduced on Windows too, and also
appears in older Sun JDK versions!

A DESCRIPTION OF THE PROBLEM :
I have encountered two ZIP files that are valid according
to WinZIP (on Windows), unzip (on Linux) and even test and
extract fine with Java's own "jar" command. However, they
cause an exception when you try to open them using the
ZipFile class.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Download the two test ZIP files from my site:
   http://www.xs4all.nl/~mfo/45_mIIb1.cup.zip
   http://www.xs4all.nl/~mfo/green.zip
2. Compile and run the test code provided below and start
   the class using either downloaded file as the sole
   command line argument.
3. You will now see an exception!
 
and:
 
4. Verify the archives with the jar tool, they can be
   extracted without problems.

EXPECTED VERSUS ACTUAL BEHAVIOR :
I expect that ZIP files that can be opened with jar,
WinZIP and unzip and test and extract well, can also be
opened by the ZipFile class.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
java.util.zip.ZipException: error in opening zip file
        at java.util.zip.ZipFile.open(Native Method)
        at java.util.zip.ZipFile.<init>(ZipFile.java:112)
        at java.util.zip.ZipFile.<init>(ZipFile.java:72)
        at ZipTest.main(Unknown Source)

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.util.zip.*;
 
public class ZipTest {
 
    public static void main(String[] args) {
        try {
            ZipFile z = new ZipFile(args[0]);
        }
        catch (Throwable t) {
            t.printStackTrace();
        }
    }
}
---------- END SOURCE ----------

CUSTOMER WORKAROUND :
None really, other than using a different ZIP file
implementation.
(Review ID: 166848)
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