JAVA管程解决哲学家就餐问题

import java.awt.GridLayout; import java.awt.Menu; import java.awt.MenuBar; import java.awt.MenuItem; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.*; class Monitor{ public int philStates[]=new int[5]; public boolean chopsticks[]=new boolean[5]; public deadlock dp; public Monitor(deadlock dp){ this.dp=dp; int i; for(i=0;i<5;i++){ philStates[i]=0; chopsticks[i]=false; } } public synchronized void pickupL(int i){ while(chopsticks[i]){ try{wait();}catch(InterruptedException e){} } chopsticks[i]=true; philStates[i]=1; dp.jl[i].setIcon(dp.pic[philStates[i]]); dp.jl[i].setText("hungry.."); } public synchronized void pickupR(int i){ while(chopsticks[(i+1)%5]){ try{wait();}catch(InterruptedException e){} } chopsticks[(i+1)%5]=true; philStates[i]=2; dp.jl[i].setIcon(dp.pic[philStates[i]]); dp.jl[i].setText("eating.."); } public synchronized void putdown(int i){ chopsticks[i]=false; chopsticks[(i+1)%5]=false; philStates[i]=0; dp.jl[i].setIcon(dp.pic[philStates[i]]); dp.jl[i].setText("thinking.."); notify(); } } public class deadlock extends JFrame{ public JLabel jl[]=new JLabel[5]; public String[] name={"Philosopher_1","Philosopher_2","Philosopher_3","Philosopher_4","Philosopher_5"}; public ImageIcon pic[]=new ImageIcon[3]; public Monitor m; public philosopher phil[]; public deadlock(){ super("DinerPhilosopher Fengfan"); pic[0]=new ImageIcon(getClass().getResource("pic/sikao.jpg")); pic[1]=new ImageIcon(getClass().getResource("pic/jie.jpg")); pic[2]=new ImageIcon(getClass().getResource("pic/chifan.jpg")); for(int i=0;i<5;i++){ jl[i]=new JLabel(name[i],pic[0],JLabel.CENTER); jl[i].setVerticalTextPosition(JLabel.BOTTOM); jl[i].setHorizontalTextPosition(JLabel.CENTER); } setSize(600, 500); setLocationRelativeTo(null); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); m=new Monitor(this); phil=new philosopher[5]; for(int i=0;i<5;i++)phil[i]=new philosopher(i,m); MenuBar mb=new MenuBar(); Menu menu1=new Menu("ON/OFF"); MenuItem mi1=new MenuItem("ON"); mi1.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ for(int i=0;i<5;i++)deadlock.this.phil[i].start(); } }); MenuItem mi2=new MenuItem("OFF"); mi2.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ for(int i=0;i<5;i++)deadlock.this.phil[i].interrupt(); } }); MenuItem mi3=new MenuItem("EXIT"); mi3.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ System.exit(0); } }); menu1.add(mi1); menu1.add(mi2); menu1.add(mi3); Menu menu2=new Menu("NOTE"); MenuItem mi4=new MenuItem("Readme"); mi4.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ JOptionPane.showMessageDialog(null,"It is not my Original,Sorry!","Readme",JOptionPane.INFORMATION_MESSAGE); } }); menu2.add(mi4); mb.add(menu1); mb.add(menu2); setMenuBar(mb); GridLayout gl=new GridLayout(3,5); setLayout(gl); add(new JLabel()); add(jl[0]); add(new JLabel()); add(jl[1]); add(new JLabel()); add(jl[4]); add(new JLabel()); add(new JLabel(new ImageIcon("pic/zhuozi.jpg"))); add(new JLabel()); add(jl[2]); add(new JLabel()); add(new JLabel()); add(jl[3]); add(new JLabel()); add(new JLabel()); setVisible(true); } public static void main(String[] args){ new deadlock(); } } class philosopher extends Thread{ private int pid; private Monitor m; public boolean status; public philosopher(int i,Monitor m){ this.pid=i; this.m=m; status=true; } public void run(){ while(status){ m.pickupL(pid); //try{Thread.sleep(100);}catch(InterruptedException e){status=false;} m.pickupR(pid); try{Thread.sleep(1000);}catch(InterruptedException e){status=false;} m.putdown(pid); try{Thread.sleep(1000);}catch(InterruptedException e){status=false;} } } }