Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.GridLayout;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.List;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JProgressBar;
import javax.swing.SwingWorker;

public class Main {
    public static void main(String[] args) {
        TwoRoot t = new TwoRoot();

    }
}

class TwoRoot extends JFrame {
    JProgressBar progressBar = new JProgressBar(0, 100);
    JLabel label = new JLabel("", JLabel.CENTER);

    public TwoRoot() {
        setLayout(new GridLayout(0, 1));
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        add(progressBar);
        add(label);
        setSize(300, 100);
        setVisible(true);

        progressBar.setIndeterminate(true);
        TwoWorker task = new TwoWorker();
        task.addPropertyChangeListener(new PropertyChangeListener() {

            @Override
            public void propertyChange(PropertyChangeEvent e) {
                if ("progress".equals(e.getPropertyName())) {
                    progressBar.setIndeterminate(false);
                    progressBar.setValue((Integer) e.getNewValue());
                }
            }
        });
        task.execute();
    }

    class TwoWorker extends SwingWorker<Double, Double> {
        int N = 5;
        double x = 1;

        @Override
        protected Double doInBackground() throws Exception {
            for (int i = 1; i <= N; i++) {
                x = x - i;
                setProgress(i * (100 / N));
                publish(x);
                Thread.sleep(1000);
            }
            return Double.valueOf(x);
        }

        @Override
        protected void process(List<Double> chunks) {
            for (double d : chunks) {
                label.setText("" + d);
            }
        }
    }
}