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ScoreLabel.javaAPI DocExample2538Tue Apr 06 08:55:14 BST 2004javathreads.examples.ch05.example3

ScoreLabel

public class ScoreLabel extends JLabel implements CharacterListener

(Omit source code)

Fields Summary
private AtomicScoreAndCharacter
scoreAchar
private AtomicReference
generator
private AtomicReference
typist
Constructors Summary
public ScoreLabel(CharacterSource generator, CharacterSource typist)


          
        this.generator = new AtomicReference<CharacterSource>(generator);
        this.typist = new AtomicReference<CharacterSource>(typist);

        if (generator != null)
             generator.addCharacterListener(this);
        if (typist != null)
             typist.addCharacterListener(this);
public ScoreLabel()

        this(null, null);
Methods Summary
public voidnewCharacter(CharacterEvent ce)

 
        // Previous character not typed correctly - 1 point penalty
        if (ce.source == generator.get()) {
            scoreAchar.setCharacterUpdateScore(ce.character);
            setScore();
        }
        // If character is extraneous - 1 point penalty
        // If character does not match - 1 point penalty
        else if (ce.source == typist.get()) {
            scoreAchar.processCharacter(ce.character);
            setScore();
        }
public voidresetGenerator(CharacterSource newGenerator)

        CharacterSource oldGenerator;

        if (newGenerator != null)
            newGenerator.addCharacterListener(this);

        oldGenerator = generator.getAndSet(newGenerator);
        if (oldGenerator != null)
            oldGenerator.removeCharacterListener(this);
public voidresetScore()

        scoreAchar.set(0, -1);
        setScore();
public voidresetTypist(CharacterSource newTypist)

        CharacterSource oldTypist;

        if (newTypist != null)
            newTypist.addCharacterListener(this);

        oldTypist = typist.getAndSet(newTypist);
        if (oldTypist != null)
            oldTypist.removeCharacterListener(this);
private voidsetScore()

        // This method will be explained later in chapter 7
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                setText(Integer.toString(scoreAchar.getScore()));
            }
        });