Java哲学家就餐GUI演示

import java.awt.Color; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.Graphics; import java.awt.Toolkit; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.File; import javax.imageio.ImageIO; import javax.swing.*; import javax.swing.plaf.metal.MetalLookAndFeel; import javax.swing.plaf.metal.OceanTheme; public class Dinner extends JFrame { private final int personCount = 10; //哲学家数量 private Room room = new Room(2);//房间锁变量,用于控制同时就餐的人数dd private JButton startBtn = new JButton("开始"); private JButton stopBtn = new JButton("暂停"); private JButton continueBtn = new JButton("继续"); private JButton endBtn = new JButton("结束"); private volatile boolean started = false; private volatile boolean stopped = false; final Chopstick[] chopstick = new Chopstick[personCount]; final Philosopher[] philos = new Philosopher[personCount]; private ImageIcon normalFace, eatFace, thinkFace, hungryFace; //表情图片 /** * 因Table(餐桌)类与Dinner类联系较为紧密，故将其作为内部类，方便消息的传递 */ class DinnerTable extends JPanel { private int counts; private int r1 = 20; private int CHOPS_LENGTH = 35; //筷子的长度 private int DISTANCE = 100; //筷子与人的距离 private int VERTICAL_DIS = -20; //表情与名字的距离 private int r2 = r1 + CHOPS_LENGTH; private int r3 = r2 + DISTANCE; private int delta; private int delta0 = -18; public DinnerTable(int counts) { setOpaque(false); this.setPreferredSize(new Dimension(550, 400)); this.counts = counts; this.delta = 360 / counts; } @Override public void paintComponent(Graphics page) { super.paintComponent(page); int x1, y1, x2, y2, x3, y3; page.fillOval(200, 150, 150, 150); //画餐桌上的筷子 for (int i = 0; i < counts; i++) { page.setColor(Color.YELLOW); //根据坐标系 x = r*cos(delta) , y = r*sin(delta) 计算点 x1 = 275 + (int) (r1 * Math.cos(((delta * i) + delta0 * (-5)) * Math.PI / 180)); y1 = 225 + (int) (r1 * Math.sin(((delta * i) + delta0 * (-5)) * Math.PI / 180)); x2 = 275 + (int) (r2 * Math.cos(((delta * i) + delta0 * (-5)) * Math.PI / 180)); y2 = 225 + (int) (r2 * Math.sin(((delta * i) + delta0 * (-5)) * Math.PI / 180)); x3 = 275 + (int) (r3 * Math.cos(((delta * i) + delta0) * Math.PI / 180)); y3 = 225 + (int) (r3 * Math.sin(((delta * i) + delta0) * Math.PI / 180)); if (chopstick[i].getOwner() != null && philos[i].getPersonId() == chopstick[i].getOwnerId()) { //检查哲学家是否拿到左边筷子 page.drawLine(x3 - 20, y3, x3 - 20, y3 + CHOPS_LENGTH); } if (chopstick[(i + 1) % personCount].getOwner() != null && philos[i].getPersonId() == chopstick[(i + 1) % personCount].getOwnerId()) { //检查哲学家是否拿到右边筷子 page.drawLine(x3 + 45, y3, x3 + 45, y3 + CHOPS_LENGTH); } if (chopstick[i].getOwner() == null) { //筷子在餐桌上 page.drawLine(x1, y1, x2, y2); } philos[i].getFace().paintIcon(this, page, x3, y3); //画表情 page.setColor(Color.BLUE); page.drawString("哲学家" + (i + 1), x3 - 5, y3 + VERTICAL_DIS);//画名字 } } } /** * 设置窗口居中 */ private void putUIInCenter() { int windowWidth = this.getWidth(); //获得窗口宽 int windowHeight = this.getHeight(); //获得窗口高 Toolkit kit = Toolkit.getDefaultToolkit(); //定义工具包 Dimension screenSize = kit.getScreenSize(); //获取屏幕的尺寸 int screenWidth = screenSize.width; //获取屏幕的宽 int screenHeight = screenSize.height; //获取屏幕的高 this.setLocation(screenWidth / 2 - windowWidth / 2, screenHeight / 2 - windowHeight / 2); } public Dinner() { setTitle("哲学家就餐"); setPreferredSize(new Dimension(600, 650)); this.pack(); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); putUIInCenter(); normalFace = new ImageIcon("init.png"); eatFace = new ImageIcon("eat.png"); thinkFace = new ImageIcon("think.png"); hungryFace = new ImageIcon("hungry.png"); JPanel btnPanel = new JPanel(); btnPanel.setBounds(160, 20, 300, 200); btnPanel.setOpaque(false); btnPanel.setLayout(new FlowLayout()); btnPanel.add(startBtn); btnPanel.add(stopBtn); btnPanel.add(continueBtn); btnPanel.add(endBtn); //各种按钮增加点击事件 startBtn.addActionListener((e) -> { if (!started) { started = true; for (int i = 0; i < personCount; i++) { philos[i].start(); } } }); continueBtn.addActionListener((e) -> { if (stopped) { for (int i = 0; i < personCount; i++) { philos[i].resume(); } stopped = false; } }); stopBtn.addActionListener((e) -> { for (int i = 0; i < personCount; i++) { philos[i].suspend(); } stopped = true; }); endBtn.addActionListener((e) -> { System.exit(1); }); JPanel mainPanel = new JPanel(); mainPanel.setLayout(null); mainPanel.setBackground(Color.black); mainPanel.add(btnPanel); DinnerTable table = new DinnerTable(personCount); table.setBounds(20, 50, 500, 420); for (int i = 0; i < chopstick.length; i++) { chopstick[i] = new Chopstick(i, table); } for (int i = 0; i < philos.length; i++) { philos[i] = new Philosopher(room, i, chopstick[i], chopstick[(i + 1) % personCount]); } mainPanel.add(table); JPanel descripPanel = new JPanel(); descripPanel.setBounds(20, 480, 200, 200); descripPanel.setOpaque(false); descripPanel.setForeground(Color.red); descripPanel.setLayout(new BoxLayout(descripPanel, BoxLayout.Y_AXIS)); JLabel label0 = new JLabel("哲学家就餐问题（信号量解决）"); label0.setForeground(Color.red); JLabel label1 = new JLabel("初始状态的哲学家", normalFace, JLabel.RIGHT); label1.setForeground(Color.red); JLabel label2 = new JLabel("思考状态的哲学家", thinkFace, JLabel.RIGHT); label2.setForeground(Color.red); JLabel label3 = new JLabel("饥饿状态的哲学家", hungryFace, JLabel.RIGHT); label3.setForeground(Color.red); JLabel label4 = new JLabel("正在吃饭的哲学家", eatFace, JLabel.RIGHT); label4.setForeground(Color.red); descripPanel.add(label0); descripPanel.add(label1); descripPanel.add(label2); descripPanel.add(label3); descripPanel.add(label4); mainPanel.add(descripPanel); getContentPane().add(mainPanel); setVisible(true); } publ