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light类:
package traffic; public class light { int x,y; //灯在画布上的位置 boolean status; //灯的状态 public light(int x,int y,boolean islight) { this.x=x; this.y=y; this.status=islight; } public void setlight(boolean sta) { //对外接口更改灯的状态 this.status=sta; } }
lamp类:
package traffic; public class lamp implements Runnable { light opposite, now; //相互匹配的两个灯 int greentime; //绿灯亮的时间 int name; //编组 boolean status; //状态 static Object lock = new Object(); public lamp(light l0, light l2,int gt, boolean st, int name) { now = l0; opposite = l2; status = st; greentime = gt; this.name = name; lightstatues(); } public void change() { this.status = !(this.status); lightstatues(); } public void setgreentime(int time) { this.greentime=time; } public int getgreentime() { return this.greentime; } public void lightstatues() { opposite.setlight(status); now.setlight(status); } public void run() { while (true) { synchronized (lock) { //使用synchronized实现进程间的互斥 if (name == mainclass.panel.islight) { //使用辅助变量实现进程按顺序循环 //System.out.println("now is: "+name); change(); mainclass.panel.repaint(); try { Thread.sleep(greentime); } catch (InterruptedException e) { e.printStackTrace(); } lock.notifyAll(); //唤醒其他进程 change(); mainclass.panel.LampChange(); mainclass.panel.repaint(); try { lock.wait(); } catch (InterruptedException e) { e.printStackTrace(); } } else { try { lock.wait(); //挂起进程 } catch (InterruptedException e) { e.printStackTrace(); } } } } } }
Mypanel类:
package traffic; import java.awt.Color; import java.awt.Graphics; import java.util.ArrayList; import java.util.Random; import javax.swing.JPanel; public class Mypanel extends JPanel { light l0,l2,l3,l4,l5,l6,l7,l8,l9,l10,l11,l12; //十二个灯 lamp lamp1,lamp2,lamp3,lamp4; //四组信号灯 static int islight; //实现进程循环的辅助变量 Random r=new Random(); static public ArrayListlightlist= new ArrayList (); //使用list方便遍历每个灯 static public ArrayList carlist= new ArrayList (); //方便遍历每个车 public Mypanel() { // TODO Auto-generated constructor stub l0=addlist(l0, 212, 316, false); l2=addlist(l2, 242, 316, false); l3=addlist(l3, 272, 316, true); l4=addlist(l4, 316, 116, true); l5=addlist(l5, 316, 146, false); l6=addlist(l6, 316, 176, false); l7=addlist(l7,116 , 70, true); l8=addlist(l8, 146, 70, false); l9=addlist(l9, 176, 70, false); l10=addlist(l10, 70, 212, false); l11=addlist(l11, 70, 242, false); l12=addlist(l12, 70, 272, true lamp1=new lamp(l9,l0,2000,false,0); lamp2=new lamp(l11,l5,2000,false,1); lamp3=new lamp(l10,l6,2000,false,2); lamp4=new lamp(l8,l2,2000,false,3); islight = 0 ; Thread t1=new Thread(lamp1); //创建并启动线程 Thread t2=new Thread(lamp2); Thread t3=new Thread(lamp3); Thread t4=new Thread(lamp4); t1.start(); t2.start(); t3.start(); t4.start(); } light addlist(light a,int x,int y,boolean sta) { a=new light(x,y,sta); lightlist.add(a); return a; } public void addcar() { //生成小车 int now,next; now=r.nextInt(4); next=r.nextInt(4); car testcar=null; while(now==next) next=r.nextInt(4); switch(now) { case 0: testcar=new car(now,next,l0,l2,l3); break; case 1: testcar=new car(now,next,l6,l5,l4); break; case 2: testcar=new car(now,next,l9,l8,l7); break; case 3: testcar=new car(now,next,l10,l11,l12); break; } carlist.add(testcar); Thread catt=new Thread(testcar); catt.start(); } public void LampChange() { islight=(islight+1)%4; } public void paint(Graphics g) { super.paint(g); g.setColor(Color.darkGray); //画路 g.fillRect(0, 100, 400, 6); g.fillRect(0, 300, 400, 6); g.fillRect(100, 0, 6, 400); g.fillRect(300, 0, 6, 400); g.setColor(Color.gray); g.fillRect(0, 200, 400, 2); g.fillRect(200, 0, 2, 400); g.setColor(Color.blue); g.setColor(Color.black); //画信号灯板 g.fillRect(202,306, 100, 40); g.fillRect(306,106, 40, 100); g.fillRect(106,60, 100, 40); g.fillRect(60,202,40, 100); light temp; car buf; for(int i=0;i welcomepanel类:
package traffic; import java.awt.Color; import java.awt.Font; import java.awt.Graphics; import javax.swing.JPanel; public class welcomepanel extends JPanel implements Runnable{ //开始界面 int info = 0; Boolean isLive=true; public void paint(Graphics g) { super.paint(g); g.fillRect(0, 0, 420,450); g.setColor(Color.red); g.setFont(new Font("微软雅黑", Font.BOLD, 30)); if (info % 2 == 0) { g.drawString("多线程红绿灯模拟", 80, 150); } } public void run() { // TODO Auto-generated method stub while (true) { try { Thread.sleep(100); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } info++; this.repaint(); if (isLive == false) { break; } } } }set类:
package traffic; import java.awt.FlowLayout; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JDialog; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JTextField; public class set extends JFrame implements ActionListener { //设置界面 JLabel lab1,lab2,lab3,lab4; JTextField jtext1,jtext2,jtext3,jtext4; JPanel panel1,panel2,panel3,panel4; JButton jb1,jb2; int time1,time2,time3,time4; public set(){ lab1=new JLabel("南北左转东西:"); lab2=new JLabel("东西直行:"); lab3=new JLabel("东西左转南北:"); lab4=new JLabel("南北直行:"); time1=mainclass.panel.lamp1.getgreentime(); time2=mainclass.panel.lamp2.getgreentime(); time3=mainclass.panel.lamp3.getgreentime(); time4=mainclass.panel.lamp4.getgreentime(); jtext1=new JTextField(String.valueOf(time1)); jtext2=new JTextField(String.valueOf(time2)); jtext3=new JTextField(String.valueOf(time3)); jtext4=new JTextField(String.valueOf(time4)); jb1=new JButton("确定"); jb1.addActionListener(this); jb2=new JButton("取消"); jb2.addActionListener(this); this.setLayout(new GridLayout(5,2,10,5)); this.add(lab1); this.add(jtext1); this.add(lab2); this.add(jtext2); this.add(lab3); this.add(jtext3); this.add(lab4); this.add(jtext4); this.add(jb1); this.add(jb2); this.setLocationRelativeTo(null); this.setSize(200, 200); this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); this.setResizable(false); this.setVisible(true); } public void actionPerformed(ActionEvent e) { if(e.getSource()==jb1) { if(jtext1.getText().length()==0||jtext2.getText().length()==0||jtext3.getText().length()==0||jtext4.getText().length()==0) JOptionPane.showMessageDialog(this, "请输入完整数据!", "错误", JOptionPane.INFORMATION_MESSAGE); else { mainclass.panel.lamp1.setgreentime(Integer.parseInt(jtext1.getText())); mainclass.panel.lamp2.setgreentime(Integer.parseInt(jtext2.getText())); mainclass.panel.lamp3.setgreentime(Integer.parseInt(jtext3.getText())); mainclass.panel.lamp4.setgreentime(Integer.parseInt(jtext4.getText())); this.dispose(); } }else if(e.getSource()==jb2){ this.dispose(); } } }mainclass主类:
package traffic; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.JOptionPane; public class mainclass extends JFrame implements ActionListener{ static Mypanel panel; JMenuBar jmb; JMenu jm1, jm2; JMenuItem jmi1, jmi2,jmi3,jmi4; welcomepanel sp; mainclass(){ this.setTitle("traffic lamp"); this.setSize(420,450); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jmb=new JMenuBar(); jm1=new JMenu("控制"); jm2=new JMenu("设置"); jmi1=new JMenuItem("开始模拟"); jmi1.addActionListener(this); jmi2=new JMenuItem("退出模拟"); jmi2.addActionListener(this); jmi3=new JMenuItem("随机生成小车"); jmi3.addActionListener(this); jmi4=new JMenuItem("更改绿灯时间"); jmi4.addActionListener(this); jm1.add(jmi1); jm1.add(jmi2); jm1.add(jmi3); jm2.add(jmi4); jmb.add(jm1); jmb.add(jm2); this.setJMenuBar(jmb); sp=new welcomepanel(); Thread t=new Thread(sp); t.start(); this.setContentPane(sp); this.setLocationRelativeTo(null); this.setResizable(false); this.setVisible(true); } public void actionPerformed(ActionEvent e) { if(e.getSource()==jmi1) { sp.isLive=false; this.remove(sp); panel = new Mypanel(); this.setContentPane(panel); this.setVisible(true); }else if(e.getSource()==jmi2) { System.exit(0); }else if(e.getSource()==jmi3) { if(panel==null) JOptionPane.showMessageDialog(this, "请开始模拟再生成小车", "错误", JOptionPane.INFORMATION_MESSAGE); else panel.addcar(); }else if (e.getSource() == jmi4) { if(mainclass.panel==null) JOptionPane.showMessageDialog(this, "请开始模拟再进行设置", "错误", JOptionPane.INFORMATION_MESSAGE); else new set(); } } public static void main(String[] args) { new mainclass(); } }多线程正确性测试:
我们在lamp类的run()方法中添加了一句控制台打印命令,每次进程运行时即会打印此进程的name成员
正确的打印结果应该为 0-1-2-3-4-0-1-2-3-4-.......-1-2-3-....
控制台的输出结果为:
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