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
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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