Code for JProgressbar for monitoring while writing into a files

Question

Could anybody help me in sample code to implement a JProgressbar while writing into a file.

Answer 1

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.lang.reflect.*; // for InvocationTargetException
public class Test extends JApplet {
     private JProgressBar pb = new JProgressBar();
     public void init() {
          Container contentPane = getContentPane();
          final JButton startButton = new JButton("start");
          contentPane.setLayout(new FlowLayout());
          contentPane.add(startButton);
          contentPane.add(pb);
          startButton.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e) {
                    GetInfoThread t = new GetInfoThread(Test.this);
                    t.start();
                    // this is okay because actionPerformed
                    // is called on the event dispatch thread
                    startButton.setEnabled(false);
     public JProgressBar getProgressBar() {
          return pb;
class GetInfoThread extends Thread {
     Runnable getValue, setValue;
     int value, currentValue;
     public GetInfoThread(final Test applet) {
          getValue = new Runnable() {
               public void run() {
                    JProgressBar pb = applet.getProgressBar();
                    currentValue = pb.getValue();
          setValue = new Runnable() {
               public void run() {
                    JProgressBar pb = applet.getProgressBar();
                    pb.setValue(value);
     public void run() {
          while(true) {
               try {
                    Thread.currentThread().sleep(500);
                    // This is okay because the getValue's run()
                    // is invoked on the event dispatch thread
                    value = (int)(Math.random() * 100);
                    try {
                         SwingUtilities.invokeAndWait(getValue);
                    catch(InvocationTargetException ite) {
                         ite.printStackTrace();
                    catch(InterruptedException ie) {
                         ie.printStackTrace();
                    if(currentValue != value) {
                         SwingUtilities.invokeLater(setValue);
               catch(InterruptedException e) {
                    e.printStackTrace();
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.lang.reflect.*; // for InvocationTargetException
public class Test extends JApplet {
     private JProgressBar pb = new JProgressBar();
     public void init() {
          Container contentPane = getContentPane();
          final JButton startButton = new JButton("start");
          contentPane.setLayout(new FlowLayout());
          contentPane.add(startButton);
          contentPane.add(pb);
          startButton.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e) {
                    GetInfoThread t = new GetInfoThread(Test.this);
                    t.start();
                    // this is okay because actionPerformed
                    // is called on the event dispatch thread
                    startButton.setEnabled(false);
     public JProgressBar getProgressBar() {
          return pb;
class GetInfoThread extends Thread {
     Runnable getValue, setValue;
     int value, currentValue;
     public GetInfoThread(final Test applet) {
          getValue = new Runnable() {
               public void run() {
                    JProgressBar pb = applet.getProgressBar();
                    currentValue = pb.getValue();
          setValue = new Runnable() {
               public void run() {
                    JProgressBar pb = applet.getProgressBar();
                    pb.setValue(value);
     public void run() {
          while(true) {
               try {
                    Thread.currentThread().sleep(500);
                    // This is okay because the getValue's run()
                    // is invoked on the event dispatch thread
                    value = (int)(Math.random() * 100);
                    try {
                         SwingUtilities.invokeAndWait(getValue);
                    catch(InvocationTargetException ite) {
                         ite.printStackTrace();
                    catch(InterruptedException ie) {
                         ie.printStackTrace();
                    if(currentValue != value) {
                         SwingUtilities.invokeLater(setValue);
               catch(InterruptedException e) {
                    e.printStackTrace();