Some methods return null for AttributeSet

Following methods return null. They should return empty AttributeSet
objects if there actually is no attribute.

java.awt.Font#getAttributes() for Font.DEFAULT
java.awt.Font#getRequestedAttributes() for Font.DEFAULT
java.awt.font.StyledString#getAttributes(0) for StyledString

Problem on Windows 95 as well as Solaris environment.

Compile and run the attached test case.

-----------------------------------------------------------------------------

import java.awt.Font;
import java.awt.font.StyledString;
import java.text.AttributeSet;

class test
{
public static void main( String args[] )
{
AttributeSet as;

                as = Font.DEFAULT.getAttributes();
if ( as != null )
System.out.println( "Passed for Font#getAttributes." );
else
System.out.println( "Failed for Font#getAttributes." );

as = Font.DEFAULT.getRequestedAttributes();
if ( as != null )
System.out.println( "Passed for Font#getRequestedAttributes." );
else
System.out.println( "Failed for Font#getRequestedAttributes." );

                StyledString ss = new StyledString( "StyledString", Font.DEFAULT );
                as = ss.getAttributes( 0 );

if ( as != null )
System.out.println( "Passed for StyledString#getAttributes." );
else
System.out.println( "Failed for StyledString#getAttributes." );
}
}


ronan.mandel@Eng 1997-12-23
/*
  Bug report from Scott Hudson <###@###.###>
  This bug manifests itself under JDK 1.2beta2 running on Win 95.

  The applet below causes the appletviewer to crash. In the "illegal
  operation" dialog that comes up I get the following trace information:

    APPLETVIEWER caused an invalid page fault in
    module KERNEL32.DLL at 013f:bff9a5d0.
    Registers:
    EAX=c0015164 CS=013f EIP=bff9a5d0 EFLGS=00010216
    EBX=0238ff84 SS=0147 ESP=0228feb4 EBP=02290150
    ECX=00000000 DS=0147 ESI=0087a520 FS=10df
    EDX=00000000 ES=0147 EDI=78035b90 GS=0000
    Bytes at CS:EIP:
    53 8b 15 7c c2 fb bf 56 89 4d e4 57 89 4d dc 89
    Stack dump:

  There appears to be two bugs here. First the font found in Font.DEFAULT
  looks to be bogus, and second, passing that font to Graphics.setFont()
  seems to cause a crash. If you comment out the line that actually crashes,
  then you get a NullPointerException when using it later on.
*/

import java.awt.*;
import java.applet.Applet;

public class bug_report2 extends Applet {
  public void paint(Graphics gc)
    {
      Dimension sz = getSize();
      Font fnt = Font.DEFAULT;

      // fnt appears bogus when printed here
      System.err.println("fnt = " + fnt);

      System.err.println("Point 1");
      gc.clearRect(0,0, sz.width, sz.height);
      System.err.println("Point 2");

      // crash seems to be here...
      gc.setFont(fnt);

      System.err.println("Point 3");
      gc.drawString("CANCEL",10,10);
      System.err.println("Point 4");
      FontMetrics metrics = Toolkit.getDefaultToolkit().getFontMetrics(fnt);
      System.err.println("Point 5");
      int w = metrics.stringWidth("CANCEL");
      System.err.println("Point 6");
      int h = metrics.getAscent() + metrics.getDescent();
      System.err.println("Point 7");
      gc.drawRect(10,10,w,h);
      System.err.println("Point 8");
    }
 }