Counter4.java

//: c14:Counter4.java
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import com.bruceeckel.swing.*;

public class Counter4 extends JApplet {
  private JButton startB = new JButton("Start");
  private Ticker[] s;
  class Ticker extends Thread {
    private JToggleButton b = new JToggleButton("Toggle");
    private JTextField t = new JTextField(10);
    private int count = 0;
    private boolean runFlag = true;
    public Ticker() {
      b.addActionListener(new ToggleL());
      JPanel p = new JPanel();
      p.add(t);
      p.add(b);
      getContentPane().add(p); 
    }
    class ToggleL implements ActionListener {
      public void actionPerformed(ActionEvent e) {
        runFlag = !runFlag;
      }
    }
    public void run() {
      while (true) {
        if (runFlag)
          t.setText(Integer.toString(count++));
        try {
          sleep(200);
        } catch(InterruptedException e) {
          System.err.println("Interrupted");
        }
      }
    }
  }
  class StartL implements ActionListener {
    public void actionPerformed(ActionEvent e) {
        startB.setBackground(Color.red);
        startB.setEnabled(false);
        for (int i = 0; i < s.length; i++)
          s[i].start();
    }
  }
  public void init() {
    Container cp = getContentPane();
    cp.setLayout(new FlowLayout());
    s = new Ticker[4];
    for (int i = 0; i < s.length; i++)
      s[i] = new Ticker();
    startB.addActionListener(new StartL());
    cp.add(startB);
  }
  public static void main(String[] args) {
    Counter4 applet = new Counter4();
    Console.run(applet, 200, 200);
  }
} ///:
} ///: