longrunningtask.java

Thinking in JAVA第四版源代码

//: gui/LongRunningTask.java
// A badly designed program.
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.concurrent.*;
import static net.mindview.util.SwingConsole.*;

public class LongRunningTask extends JFrame {
  private JButton
    b1 = new JButton("Start Long Running Task"),
    b2 = new JButton("End Long Running Task");
  public LongRunningTask() {
    b1.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent evt) {
        try {
          TimeUnit.SECONDS.sleep(3);
        } catch(InterruptedException e) {
          System.out.println("Task interrupted");
          return;
        }
        System.out.println("Task completed");
      }
    });
    b2.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent evt) {
        // Interrupt yourself?
        Thread.currentThread().interrupt();
      }
    });
    setLayout(new FlowLayout());
    add(b1);
    add(b2);
  }
  public static void main(String[] args) {
    run(new LongRunningTask(), 200, 150);
  }
} ///:~