Name: rmT116609 Date: 02/05/2001


java version "1.3.0_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0_01)
Java HotSpot(TM) Client VM (build 1.3.0_01, mixed mode)



First of all, I am serializing and deserializing FontMetrics on the same machine
and therefore the same OS. So this cannot be a duplicate of bug 4082048.
import java.awt.*;

public class FontMetricsSerialization {

        public FontMetricsSerialization() {
        }

    public void writeFontMetrics() throws Exception {
                FontMetrics fm = new Panel().getFontMetrics( new Font( "Lucida Console", Font.PLAIN, 10 ) );
        System.out.println( "Height: " + fm.getHeight() );
        System.out.println( "Ascent: " + fm.getAscent() );
        System.out.println( "Descent: " + fm.getDescent() );
        System.out.println( "Font: " + fm.getFont() );
        FileOutputStream fileOut = new FileOutputStream( "font.ser" );
        ObjectOutputStream out = new ObjectOutputStream( fileOut );
        out.writeObject( fm );
        out.flush();
        out.close();
    }

    public void readFontMetrics() throws Exception {
        FileInputStream fileIn = new FileInputStream( "font.ser" );
        ObjectInputStream in = new ObjectInputStream( fileIn );
        FontMetrics fm = ( FontMetrics ) in.readObject();
        in.close();

        System.out.println( "Height: " + fm.getHeight() );
        System.out.println( "Ascent: " + fm.getAscent() );
        System.out.println( "Descent: " + fm.getDescent() );
        System.out.println( "Font: " + fm.getFont() );
    }

    public static void main( String args[] ) throws Exception {
        FontMetricsSerialization test = new FontMetricsSerialization();
        test.writeFontMetrics();
        test.readFontMetrics();
        System.exit(0);
        }
}


Here is the output with Sun's JDK 1.3.0:


[jmsalvo@jsalvo-desktop test]$ /usr/local/jdk1.3.0_01-sun/bin/java -classpath
classes/ FontMetricsSer
ialization
Height: 11
Ascent: 8
Descent: 3
Font: java.awt.Font[family=Lucida Sans,name=Lucida Console,style=plain,size=10]
Height: 0
Ascent: 8
Descent: 3
Font: java.awt.Font[family=Lucida Sans,name=Lucida Console,style=plain,size=10]


Note that getHeight() returns 0 after reading back from the file.

Also note that using Sun's JDK 1.2.2, getHeight() returns the original value:

[jmsalvo@jsalvo-desktop test]$ /usr/local/jdk1.2.2-sun/bin/java -classpath
classes/ FontMetricsSerialization
Height: 11
Ascent: 8
Descent: 3
Font: java.awt.Font[family=Lucida Sans,name=Lucida Console,style=plain,size=10]
Height: 11
Ascent: 8
Descent: 3
Font: java.awt.Font[family=Lucida Sans,name=Lucida Console,style=plain,size=10]


Why did it work with JDK 1.2.2, but not anymore with JDK 1.3.0?
(Review ID: 116245)
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