philosopher.java

Java样例程序集合：2D

import java.util.Random;

import java.awt.*;
import javax.swing.JLabel;
import javax.swing.ImageIcon;
import javax.swing.SwingUtilities;

public class Philosopher extends JLabel implements Runnable {
    private Chopstick leftStick, rightStick;
    private boolean sated;
    private DiningPhilosophers parent;
    private int position;
		private Dukes currentIcon;
		private String currentText;
    Thread philThread = null;

    public Philosopher(DiningPhilosophers parent, int position) {
			super(parent.names[position], parent.imgs.get(Dukes.HUNGRYDUKE), JLabel.CENTER);

			this.parent = parent;
			this.position = position;

			setVerticalTextPosition(JLabel.BOTTOM);
			setHorizontalTextPosition(JLabel.CENTER);

			// Identify the chopsticks to my right and left
			this.rightStick = parent.chopsticks[position];
			if (position == 0) {
				this.leftStick = parent.chopsticks[parent.NUMPHILS-1];
			} else {
				this.leftStick = parent.chopsticks[position-1];
			}

			// I'm hungry
			this.sated = false;
			philThread = new Thread(this);
	}

    public void run() {
			try {
				while (true) {
						Thread.sleep((int)(Math.random() * parent.grabDelay));
						rightStick.grab();
						currentIcon = Dukes.RIGHTSPOONDUKE;
						currentText = "     ";
						try {
							updatePhilosopher();
						} catch (Exception e) {
							break;
						}
						Thread.sleep((int)(Math.random() * parent.grabDelay));
						leftStick.grab();
						currentIcon = Dukes.BOTHSPOONSDUKE;
						try {
							updatePhilosopher();
						} catch (Exception e) {
							break;
						}
						
						Thread.sleep((int)(Math.random() * parent.grabDelay));
						rightStick.release();
						leftStick.release();
						currentIcon = Dukes.HUNGRYDUKE;
						currentText = "Good!";
						try {
							updatePhilosopher();
						} catch (Exception e) {
							break;
						}
						sated = true;

						Thread.sleep((int)(Math.random() * parent.grabDelay * 4));
						sated = false;
				}
			} catch (java.lang.InterruptedException e) {
			}
			leftStick.releaseIfMine();
			rightStick.releaseIfMine();
			
			currentIcon = Dukes.HUNGRYDUKE;
			currentText = parent.names[position];
			try {
				updatePhilosopher();
			} catch (Exception e) {
				System.err.println("Couldn't update icon for " + position);
			}
			sated = false;
			philThread = new Thread(this);
    }
		
    void updatePhilosopher() throws Exception {
			Runnable changeThePhilosopher = new Runnable() {
				public void run() {
						setText(currentText);
						setIcon(parent.imgs.get(currentIcon));
				}
			};
			SwingUtilities.invokeAndWait(changeThePhilosopher);
    } 
}