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Posted to dev@harmony.apache.org by "Tim Ellison (JIRA)" <ji...@apache.org> on 2006/02/07 13:08:58 UTC
[jira] Assigned: (HARMONY-54) java.io.BufferedReader.read(null,int
off,int len) does not throw NPE when len==0
[ http://issues.apache.org/jira/browse/HARMONY-54?page=all ]
Tim Ellison reassigned HARMONY-54:
----------------------------------
Assign To: Tim Ellison
> java.io.BufferedReader.read(null,int off,int len) does not throw NPE when len==0
> --------------------------------------------------------------------------------
>
> Key: HARMONY-54
> URL: http://issues.apache.org/jira/browse/HARMONY-54
> Project: Harmony
> Type: Bug
> Components: Classlib
> Reporter: Vladimir Ivanov
> Assignee: Tim Ellison
> Attachments: BufferedReaderTest.java
>
> In java.io package description j2se 1.4.2 specification says, that unless otherwise noted, passing a null argument to a constructor or method in any class or interface in this package will cause a NullPointerException to be thrown.
> But java.io.BufferedReader.read(null,int off,int len) does not throw NPE when len==0
> Code to reproduce:
> import java.io.*;
>
> public class test29 {
> public static void main(String[] args) {
> char []ch = {};
> char [] s = null;
> BufferedReader toRet = new BufferedReader(new CharArrayReader(ch));
> try {
> System.out.println("read(s, 1, 0)= " + toRet.read(s, 1, 0));
> } catch (Exception t) {
> System.out.println("Exception: " + t);
> }
> try {
> System.out.println("read(s, 1, 1)= " + toRet.read(s, 1, 1));
> } catch (Exception t) {
> System.out.println("Exception: " + t);
> }
> }
> }
> Steps to Reproduce:
> 1. Build Harmony (check-out on 2006-01-30) j2se subset as described in README.txt.
> 2. Compile test29.java using BEA 1.4 javac
> > javac -d . test29.java
> 3. Run java using compatible VM (J9)
> > java -showversion test29
> Output:
> C:\tmp\tmp17>C:\jrockit-j2sdk1.4.2_04\bin\java.exe -showversion test29
> java version "1.4.2_04"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_04-b05)
> BEA WebLogic JRockit(TM) 1.4.2_04 JVM (build ari-31788-20040616-1132-win-ia32, Native Threads, GC strategy: parallel)
> Exception: java.lang.NullPointerException
> Exception: java.lang.NullPointerException
> C:\tmp\tmp17>C:\harmony\trunk\deploy\jre\bin\java -showversion test29
> java version 1.4.2 (subset)
> (c) Copyright 1991, 2005 The Apache Software Foundation or its licensors, as applicable.
> read(s, 1, 0)= 0
> Exception: java.lang.NullPointerException
> C:\tmp\tmp17>
> junit test:
> ------------------------ BufferedReaderTest.java -------------------------------------------------
> import java.io.*;
> import junit.framework.*;
>
> public class BufferedReaderTest extends TestCase {
> public static void main(String[] args) {
> junit.textui.TestRunner.run(BufferedReaderTest.class);
> }
> public void testHashCode() {
> char []ch = {};
> BufferedReader toRet = new BufferedReader(new CharArrayReader(ch));
> try {
> toRet.read(null, 1, 0);
> fail("NullPointerException expected");
> } catch (NullPointerException e) {
> } catch (Exception e) {
> fail("Unexpected exception: " + e);
> }
> }
> }
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