JDK-7148436 : SE7 swing TitledBorder.getFont() now returns null
  • Type: Bug
  • Status: Closed
  • Resolution: Duplicate
  • Component: client-libs
  • Sub-Component: javax.swing
  • Priority: P3
  • Affected Version: 7
  • OS: linux
  • CPU: x86
  • Submit Date: 2012-02-24
  • Updated Date: 2012-05-03
  • Resolved Date: 2012-03-01
Related Reports
Duplicate :  
Description
FULL PRODUCT VERSION :
> ../jdk1.7.0_03/bin/java -version
java version "1.7.0_03"
Java(TM) SE Runtime Environment (build 1.7.0_03-b04)
Java HotSpot(TM) 64-Bit Server VM (build 22.1-b02, mixed mode)
> ../jdk1.6.0_31/bin/java -version
java version "1.6.0_31"
Java(TM) SE Runtime Environment (build 1.6.0_31-b04)
Java HotSpot(TM) 64-Bit Server VM (build 20.6-b01, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
openSUSE 12.1 x64
> uname -a
Linux linux64.workgroup 3.1.9-1.4-desktop #1 SMP PREEMPT Fri Jan 27 08:55:10 UTC 2012 (efb5ff4) x86_64 x86_64 x86_64 GNU/Linux

EXTRA RELEVANT SYSTEM CONFIGURATION :
Java SE6 and SE7 JDKs

A DESCRIPTION OF THE PROBLEM :
Regression in SE 7 swing TitledBorder Component for getFont() -- now returning null.

The answer to Bug 7022041 seems to imply that this is not a regression
-- that no Component getFont() can ever be depended upon!

Is this then a (default) Look & Feel regression?

REGRESSION.  Last worked in version 6u29

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
see below for TtlBrder.java
> ../jdk1.6.0_31/bin/javac TtlBrdr.java
> ../jdk1.6.0_31/bin/java TtlBrdr
> ../jdk1.7.0_03/bin/java TtlBrdr


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
TitledBorder.getFont() to return a non-null Font object in SE 7,
like it did in SE 6.
ACTUAL -
With SE 6 TitledBorder.getFont() returned a non-null Font object,
but with SE 7 returns a null Font object.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
> ../jdk1.6.0_31/bin/java TtlBrdr
java.awt.Font[family=Dialog,name=Dialog,style=bold,size=12]
> ../jdk1.7.0_03/bin/java TtlBrdr
java.lang.NullPointerException


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
> cat TtlBrdr.java
import javax.swing.border.TitledBorder;
import java.awt.Font;
public class TtlBrdr {
  public static void main(String[] args) {
    try {
      Font fnt = new TitledBorder("test").getTitleFont().deriveFont(Font.BOLD);
      System.out.println(fnt);
    } catch (Exception e) {
      System.out.println(e.toString());
    }
  }
}

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

CUSTOMER SUBMITTED WORKAROUND :
Add a null check and getFont() from another Component (Label perhaps) for SE 7.
But bug 7022041 answer says that this can not be depended upon to work either!

Comments
EVALUATION As said in 7022041: "It is not a bug, because the method does not declare that it always returns non-null value."
2012-03-01