Name: sdC67446 Date: 09/18/98


There is inconsistency in the behaviour ZipInputStream and ZipOutputStream
constructors. The constructor java.util.zip.ZipInputStream(InputStream is)
doesn't throw NullPointerException for 'is' == null. The same situation
causes the ZipOutputStream(null) to throw NullPointerException.

The doc says:
--------------------------------------------------
public ZipInputStream(InputStream in)

      Creates a new ZIP input stream.
      Parameters:
            in - the actual input stream

public ZipOutputStream(OutputStream out)

      Creates a new ZIP output stream.
      Parameters:
            out - the actual output stream

Please note that in both cases the doc is silent about
passing null to the constructor.


The test demonstrating the bug:
-----------------Test.java------------------------
import java.util.zip.*;

public class Test {
  public static void main(String[] args) {
      try {
ZipOutputStream zos = new ZipOutputStream(null);
System.out.println("no exception");
      } catch (NullPointerException e) {
System.out.println(e);
      }
      try {
ZipInputStream zis = new ZipInputStream(null);
System.out.println("no exception");
      } catch (NullPointerException e) {
System.out.println(e);
      }
  }
}
---------Output from the test---------------------
java.lang.NullPointerException
no exception
--------------------------------------------------
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