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import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.SwingWorker;
public class Main extends JFrame {
public Main() {
this.setLayout(new FlowLayout());
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JButton processButton = new JButton("Start");
JButton helloButton = new JButton("Hello");
processButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
MyTask process = new MyTask();
try {
process.execute();
} catch (Exception e) {
e.printStackTrace();
}
}
});
helloButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(null, "Hello There");
}
});
this.getContentPane().add(processButton);
this.getContentPane().add(helloButton);
this.pack();
setVisible(true);
}
public static void main(String[] args) {
new Main();
}
}
class MyTask extends SwingWorker {
protected Object doInBackground() throws Exception {
Integer result = new Integer(0);
for (int i = 0; i < 10; i++) {
result += i * 10;
try {
Thread.sleep(5000);
} catch (Exception e) {
e.printStackTrace();
}
}
return result;
}
}
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