mainframe.java~7~

此源码是实现线程间同步互斥的算法

package jthreadsynch;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2002</p>
 * <p>Company: </p>
 * @author unascribed
 * @version 1.0
 */

public class MainFrame extends JFrame {
  private JPanel contentPane;
  private BorderLayout borderLayout1 = new BorderLayout();
  private JLabel jLabel1 = new JLabel();
  public JProgressBar jProgressBar1 = new JProgressBar();
  private JButton jButton1 = new JButton();
  private JScrollPane jScrollPane1 = new JScrollPane();
  private JTextArea jTextArea1 = new JTextArea();

  private int sharedData=0;
  private boolean dataAvailable=false;
  private Producer pro=null;


  //Construct the frame
  public MainFrame() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception  {
    //setIconImage(Toolkit.getDefaultToolkit().createImage(MainFrame.class.getResource("[Your Icon]")));
    contentPane = (JPanel) this.getContentPane();
    jLabel1.setFont(new java.awt.Font("Dialog", 0, 14));
    jLabel1.setHorizontalAlignment(SwingConstants.CENTER);
    jLabel1.setText("线程同步互斥");
    contentPane.setLayout(borderLayout1);
    this.setSize(new Dimension(383, 204));
    this.setTitle("JThreadSynch");
    jButton1.setFont(new java.awt.Font("Dialog", 0, 14));
    jButton1.setToolTipText("");
    jButton1.setText("Start");
    jButton1.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton1_actionPerformed(e);
      }
    });
    jProgressBar1.setOrientation(JProgressBar.VERTICAL);
    jProgressBar1.setPreferredSize(new Dimension(150, 148));
    contentPane.add(jLabel1, BorderLayout.NORTH);
    contentPane.add(jProgressBar1, BorderLayout.WEST);
    contentPane.add(jButton1, BorderLayout.SOUTH);
    contentPane.add(jScrollPane1, BorderLayout.CENTER);
    jScrollPane1.getViewport().add(jTextArea1, null);
  }
  //Overridden so we can exit when window is closed
  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }

  public synchronized int setSharedData(){
    if(this.dataAvailable){
      try{
        wait();
      }catch(Exception err){
        err.printStackTrace();
      }
    }
    this.sharedData++;
    this.jTextArea1.append("Producer working ...."+"NewData is"+String.valueOf(this.sharedData)+"\n");
    if(this.sharedData==100){
      this.jTextArea1.append("Producer has done all things"+"Consumer,it's time to wake up! "+"\n");
      this.dataAvailable=true;
      notifyAll();
    }
    return this.sharedData;

  }

  public synchronized int getSharedData(){
    if(!this.dataAvailable){
      try{
        wait();
      }catch(Exception err){
      err.printStackTrace();
      }
    }
    this.sharedData--;
    this.jTextArea1.append("Consumer is working ....."+"NewData is "+String.valueOf(this.sharedData)+"\n");
    if(this.sharedData==0){
      this.jTextArea1.append("Consumer has done all things"+"Producer,it's time to wake up! "+"\n");
      this.dataAvailable=false;
      notifyAll();
    }
    return this.sharedData;
  }

  void jButton1_actionPerformed(ActionEvent e) {
    if(((JButton)e.getSource()).getText().equals("Start")){
      ((JButton)e.getSource()).setText("Stop");
      pro=new Producer(this);
      pro.start();
    }else{
      ((JButton)e.getSource()).setText("Start");
      pro.stopped=true;

    }
  }


}