51 lines
1.4 KiB
Java
51 lines
1.4 KiB
Java
//: gui/InterruptableLongRunningTask.java
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// Long-running tasks in threads.
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import javax.swing.*;
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import java.awt.*;
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import java.awt.event.*;
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import java.util.concurrent.*;
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import static net.mindview.util.SwingConsole.*;
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class Task implements Runnable {
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private static int counter = 0;
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private final int id = counter++;
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@Override
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public void run() {
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System.out.println(this + " started");
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try {
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TimeUnit.SECONDS.sleep(3);
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} catch(InterruptedException e) {
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System.out.println(this + " interrupted");
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return;
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}
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System.out.println(this + " completed");
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}
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@Override
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public String toString() { return "Task " + id; }
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public long id() { return id; }
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};
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public class InterruptableLongRunningTask extends JFrame {
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private JButton
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b1 = new JButton("Start Long Running Task"),
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b2 = new JButton("End Long Running Task");
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ExecutorService executor =
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Executors.newSingleThreadExecutor();
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public InterruptableLongRunningTask() {
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b1.addActionListener((ActionEvent e) -> {
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Task task = new Task();
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executor.execute(task);
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System.out.println(task + " added to the queue");
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});
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b2.addActionListener((ActionEvent e) -> {
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executor.shutdownNow(); // Heavy-handed
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});
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setLayout(new FlowLayout());
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add(b1);
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add(b2);
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}
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public static void main(String[] args) {
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run(new InterruptableLongRunningTask(), 200, 150);
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}
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} ///:~
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