Name: mgC56079 Date: 08/14/98



Here is the test: create an ampty jar with JarOutputStream.
Try to open it with JarInputStream. This will result in a NullPointerException.

=== JarIS.java ======
import java.util.jar.*;
import java.io.*;

public class JarIS {

  public static void main(String args[]) {
    ByteArrayOutputStream out=new ByteArrayOutputStream();
    try {
      new JarOutputStream(out);
      JarInputStream is = new JarInputStream(new ByteArrayInputStream(out.toByteArray()));
    }
    catch (IOException e) {
      System.out.println("unexpected IOException");
    }
    System.out.println("passed");


  }

}
==== sample run ====
% java -Djava.compiler=None JarIS
Warning: JIT compiler "None" not found. Will use interpreter.
Exception in thread "main" java.lang.NullPointerException
at java.util.jar.JarInputStream.<init>(JarInputStream.java:67)
at java.util.jar.JarInputStream.<init>(JarInputStream.java:50)
at JarIS.main(JarIS.java:10)


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