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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

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()));
            }
        });