1.1 Changes: Philosophers Applet

FramedArea.java, which is part of the Dining Philosophers applet, uses deprecated methods: The size method and the insets method. In 1.1, these methods have been renamed to getSize and getInsets, respectively. In addition, the applet uses the old event handling mechanism.

Here's the JDK 1.1 version of the FramedArea.java file using the new method name:

import java.awt.*;

class FramedArea extends Panel {
    PhilosopherArea philosopherArea;

    public FramedArea(PhilAnimator1_1 controller) {
        super();

        //Set layout to one that makes its contents as big as possible.
        setLayout(new GridLayout(1,0));

	philosopherArea = new PhilosopherArea(controller);
        add(philosopherArea);
        validate();
    }

    public Insets getInsets() {
        return new Insets(4,4,5,5);
    }

    public void paint(Graphics g) {
        Dimension d = getSize();
        Color bg = getBackground();

        g.setColor(bg);
        g.draw3DRect(0, 0, d.width - 1, d.height - 1, true);
        g.draw3DRect(3, 3, d.width - 7, d.height - 7, false);
    }

    public void stopButton() {
	philosopherArea.stopPhilosophers();
	philosopherArea.createPhilosophersAndChopsticks();
	philosopherArea.repaint();
    }

    public void startButton() {
	philosopherArea.startPhilosophers();
    }
}

In addition, PhilosopherArea.java, another part of the Dining Philosophers applet, also uses the size method and uses the old event handling mechanism. Here's the JDK 1.1 version of the PhilAnimator.java file using the new event handling scheme:

import java.awt.*;

// for dealing with the start stop button
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

// for dealing with the delay slider
import java.awt.event.AdjustmentListener;
import java.awt.event.AdjustmentEvent;

public class PhilAnimator1_1 extends java.applet.Applet
	implements ActionListener, AdjustmentListener {

    Button stopStartButton = new Button("start");

        // delays can go from 500 to 10,000 (they get multiplied by 100 in Philosopher
    Scrollbar grabDelaySlider = new Scrollbar(Scrollbar.HORIZONTAL, 5, 1, 0, 100);
    Label label = new Label("  500 milliseconds");

    FramedArea framedArea;

    public void init() {
        GridBagLayout gridBag = new GridBagLayout();
        GridBagConstraints c = new GridBagConstraints();

        setLayout(gridBag);

        framedArea = new FramedArea(this);
        c.fill = GridBagConstraints.BOTH;
        c.weighty = 1.0;
        c.gridwidth = GridBagConstraints.REMAINDER; //end row
        gridBag.setConstraints(framedArea, c);
        add(framedArea);

        c.fill = GridBagConstraints.HORIZONTAL;
        c.weightx = 1.0;
        c.weighty = 0.0;
        gridBag.setConstraints(stopStartButton, c);
        add(stopStartButton);


        c.gridwidth = GridBagConstraints.RELATIVE; //don't end row
        c.weightx = 1.0;
        c.weighty = 0.0;
        gridBag.setConstraints(grabDelaySlider, c);
        add(grabDelaySlider);

        c.weightx = 0.0;
        c.gridwidth = GridBagConstraints.REMAINDER; //end row
        gridBag.setConstraints(label, c);
        add(label);

        validate();
	stopStartButton.addActionListener(this);
	grabDelaySlider.addAdjustmentListener(this);
    }

    public void actionPerformed(ActionEvent e) {
        if (stopStartButton.getLabel().equals("stop/reset")) {
            framedArea.stopButton();
            stopStartButton.setLabel("start");
        } else if (stopStartButton.getLabel().equals("start")) {
            framedArea.startButton();
            stopStartButton.setLabel("stop/reset");
        }
    }
    public void adjustmentValueChanged(AdjustmentEvent e) {
        label.setText(String.valueOf(100*grabDelaySlider.getValue()) + " milliseconds");
    }
}

Let's run it!

Since you can't run the applet, here's a picture of it:

For details about this and other changes to the AWT see GUI Changes: The AWT Grows Up .