threadtest.java

金旭亮的java教案

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



public class ThreadTest {
  boolean packFrame = false;

  //构造函数
  public ThreadTest() {
    Frame1 frame = new Frame1(); //创建窗体
    //Validate frames that have preset sizes
    //Pack frames that have useful preferred size info, e.g. from their layout
    if (packFrame) {
      frame.pack();
    }
    else {
      frame.validate();
    }
    //Center the window
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    Dimension frameSize = frame.getSize();
    if (frameSize.height > screenSize.height) {
      frameSize.height = screenSize.height;
    }
    if (frameSize.width > screenSize.width) {
      frameSize.width = screenSize.width;
    }
    frame.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2);
    frame.setVisible(true);
  }
  //Main method
  public static void main(String[] args) {
    try {
      UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    }
    catch(Exception e) {
      e.printStackTrace();
    }
    new ThreadTest();  //从构造函数中启动多线程
  }
}


 class Frame1 extends JFrame {
  JPanel contentPane;
  BorderLayout borderLayout1 = new BorderLayout();
  TextArea textArea1 = new TextArea();

  //Construct the frame
  public Frame1() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      //用一个内部类实现Runnable接口
      class ThreadRunnableDemo implements Runnable
      {
        String name;
        ThreadRunnableDemo(String s)
        {
          name=s;
        }
        public void run()
        {
          textArea1.append(name+" started execution...\n");
          for(int i=0;i<10;i++)
          {
            textArea1.append(i+" ");
          }
          textArea1.append("\n"+name+" finished executing.\n");
        }

      }
         //以下代码启动多线程执行
         ThreadRunnableDemo demo1=new ThreadRunnableDemo("Thread 1");
         ThreadRunnableDemo demo2=new ThreadRunnableDemo("Thread 2");
         Thread t1=new Thread(demo1);
         Thread t2=new Thread(demo2);
         t1.start();
         t2.start();



      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception  {
    contentPane = (JPanel) this.getContentPane();
    contentPane.setLayout(borderLayout1);
    this.setSize(new Dimension(400, 300));
    this.setTitle("Frame Title");

    //textArea1.setText("Hello");
    contentPane.add(textArea1, BorderLayout.CENTER);
  }
  //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);
    }
  }
}