REGRESSION: javac doesn't implement transitive rule for overriding

Name: rmT116609 Date: 06/24/2002


FULL PRODUCT VERSION :
java version "1.4.1-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1-beta-b14)
Java HotSpot(TM) Client VM (build 1.4.1-beta-b14, mixed mode)

FULL OPERATING SYSTEM VERSION :
Microsoft Windows XP [Version 5.1.2600], Windows 2000

A DESCRIPTION OF THE PROBLEM :
I cannot compile a J2ME app that has a class that subclasses javax.microedition.lcdui.Canvas. I am using J2ME Wireless
  Toolkit version 1.0.4. The app compiles fine using J2SDK 1.4.0.

When I try to compile the app, here's the compile error I get:

MyTestClass.java:529: MyTestClass should be declared abstract; it does not define paint(javax.microedition.lcdui.Graphics) in javax.microedition.lcdui.Displayable

The class DOES define this - again it compiles fine in J2SDK
1.4.

It appears as if the Displayable abstract class, which
Canvas inherits from, defines paint() as package-level
access, while Canvas defines this as protected. I'm not sure
if that has anything to do with it.


REGRESSION. Last worked in version 1.4

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Using J2SDK 1.4.1 beta and J2ME Wireless Toolkit 1.0.4, try
to compile the following class using the given command line:



import javax.microedition.lcdui.*;

public class MyTestClass extends Canvas
{
protected void paint(Graphics g) {
//NO-OP
}
}


>javac -bootclasspath C:\WTK104\lib\midpapi.zip MyTestClass.java


The following error should occur:

MyTestClass.java:3: MyTestClass should be declared abstract;
it does not define
paint(javax.microedition.lcdui.Graphics) in
javax.microedition.lcdui.Displayable

public class MyTestClass extends Canvas




EXPECTED VERSUS ACTUAL BEHAVIOR :
The expected result is that this compiles fine. It could be
a problem with the Wireless Toolkit library not being
compatible w/ J2SDK 1.4.1 beta.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
MyTestClass.java:3: MyTestClass should be declared abstract; it does not define
paint(javax.microedition.lcdui.Graphics) in javax.microedition.lcdui.Displayable

public class MyTestClass extends Canvas




REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javax.microedition.lcdui.*;

public class MyTestClass extends Canvas
{
protected void paint(Graphics g) {
//NO-OP
}
}


>javac -bootclasspath C:\WTK104\lib\midpapi.zip MyTestClass.java

---------- END SOURCE ----------

CUSTOMER WORKAROUND :
Haven't found one yet. Revert back to 1.4.0 I guess.

Release Regression From : 1.4.0_01
The above release value was the last known release where this
bug was known to work. Since then there has been a regression.

(Review ID: 158332)
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