Java – 我需要在Swing GUI程序中更新JTextFields
我有一个程序，可以查看单个记事本文件，其中包含类似于以下内容的信息：
Cardiff : 3245658 Bristol : 4726485 Manchester : 4728945 这些地方和号码来自自动系统，数字每20秒左右变化一次。 我需要创建一个循环（我猜），这样当数字改变时，我的程序将回头查看记事本文件并更新JTextField的数字
Ps我已经创建了程序，以便它查看文件，获取信息需求并使用ArrayList将其放在正确的位置，
我需要帮助的是如何在文件发生变化时自动更新代码，并且我需要在不使用任何类型的Jbuttons情况下执行此Jbuttons ，它只需要自己完成。
我的整个代码：
package window; import java.awt.Color; import java.awt.EventQueue; import java.io.BufferedReader; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.IOException; import java.util.ArrayList; import javax.swing.ImageIcon; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JTextField; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; public class MapTest { private JFrame frame; static JTextField txtCardiff; static JTextField txtBristol; static JTextField txtSheffield; static JTextField txtDerby; static JTextField txtGlasgow; static JTextField txtFalkirk; static JTextField txtNewcastle; static JTextField txtLeeds; static JTextField txtPreston; static JTextField txtManchester; static JTextField txtWolverhampton; static JTextField txtBirmingham; static JTextField txtMiltonKeynes; static JTextField txtPeterborough; static JTextField txtColindale; static JTextField txtStepneyGreen; static JTextField txtSlough; static JTextField txtFaraday; static JTextField txtGuildford; static JTextField txtSouthbank; static BufferedReader CSVFile = new BufferedReader(new FileReader ("C:/Users/606854007/workspace/NetworkAppTest/jar/window/Cardiff.txt")); // putting static infront of this Br ' CSVFile' gives: //Unhandled exception type FileNotFoundException. //but when i take away the 'static' it causes a problem in the 'FileCheckerWorker' class. // (Will comment where and what) ArrayList csv = new ArrayList(); /** private String output = ""; private String output1 = ""; private String output2 = ""; private String output3 = ""; private String output4 = ""; private String output5 = ""; private String output6 = ""; private String output7 = ""; private String output8 = ""; private String output9 = ""; private String output10 = ""; private String output11 = ""; private String output12 = ""; private String output13 = ""; private String output14 = ""; private String output15 = ""; private String output16 = ""; private String output17 = ""; private String output18 = ""; private String output19 = ""; **/ /** * Launch the application. */ public static void main(String[] args) { try { UIManager.setLookAndFeel( UIManager.getSystemLookAndFeelClassName()); } catch (ClassNotFoundException e1) { e1.printStackTrace(); } catch (InstantiationException e1) { e1.printStackTrace(); } catch (IllegalAccessException e1) { e1.printStackTrace(); } catch (UnsupportedLookAndFeelException e1) { e1.printStackTrace(); } EventQueue.invokeLater(new Runnable() { public void run() { try { MapTest window = new MapTest(); window.frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); } /** * Create the application. * * @throws IOException */ public MapTest() throws IOException { try { initialize(); } catch (FileNotFoundException e) { e.printStackTrace(); } } /** * Initialise the contents of the frame. * * @param output * @throws IOException */ private void initialize() throws IOException { csv.add(CSVFile.readLine()); csv.add(CSVFile.readLine()); csv.add(CSVFile.readLine()); csv.add(CSVFile.readLine()); csv.add(CSVFile.readLine()); csv.add(CSVFile.readLine()); csv.add(CSVFile.readLine()); csv.add(CSVFile.readLine()); csv.add(CSVFile.readLine()); csv.add(CSVFile.readLine()); csv.add(CSVFile.readLine()); csv.add(CSVFile.readLine()); csv.add(CSVFile.readLine()); csv.add(CSVFile.readLine()); csv.add(CSVFile.readLine()); csv.add(CSVFile.readLine()); csv.add(CSVFile.readLine()); csv.add(CSVFile.readLine()); csv.add(CSVFile.readLine()); csv.add(CSVFile.readLine()); System.out.println(csv.get(0)); System.out.println(csv.get(1)); System.out.println(csv.get(2)); System.out.println(csv.get(3)); System.out.println(csv.get(4)); System.out.println(csv.get(5)); System.out.println(csv.get(6)); System.out.println(csv.get(7)); System.out.println(csv.get(8)); System.out.println(csv.get(9)); System.out.println(csv.get(10)); System.out.println(csv.get(11)); System.out.println(csv.get(12)); System.out.println(csv.get(13)); System.out.println(csv.get(14)); System.out.println(csv.get(15)); System.out.println(csv.get(16)); System.out.println(csv.get(17)); System.out.println(csv.get(18)); System.out.println(csv.get(19)); /** * JPanel container = new JPanel(); container.add(txtBirmingham); * container.add(txtBristol); container.add(txtCardiff); * container.add(txtColindale); container.add(txtDerby); * container.add(txtFalkirk); container.add(txtGlasgow); * container.add(txtGuildford); container.add(txtLeeds); * container.add(txtManchester); container.add(txtMiltonKeynes); * container.add(txtNewcastle); container.add(txtPeterborough); * container.add(txtPreston); container.add(txtSheffield); * container.add(txtSlough); container.add(txtSouthbank); * container.add(txtStepneyGreen); container.add(txtWolverhampton); * //container.add(); JScrollPane jsp = new JScrollPane(container); * frame.add(jsp); **/ frame = new JFrame(); frame.setBounds(0, 0, 1000, 1086); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.getContentPane().setLayout(null); frame.setBackground(Color.CYAN); txtCardiff = new JTextField(); txtCardiff.setText(csv.get(0)); txtCardiff.setBackground(Color.GREEN); txtCardiff.setBounds(305, 699, 102, 20); frame.getContentPane().add(txtCardiff); txtCardiff.setColumns(10); txtBristol = new JTextField(); txtBristol.setText(csv.get(1)); txtBristol.setBackground(Color.GREEN); txtBristol.setBounds(416, 780, 102, 20); frame.getContentPane().add(txtBristol); txtBristol.setColumns(10); txtSheffield = new JTextField(); txtSheffield.setText(csv.get(2)); txtSheffield.setBackground(Color.GREEN); txtSheffield.setBounds(517, 356, 110, 20); frame.getContentPane().add(txtSheffield); txtSheffield.setColumns(10); txtDerby = new JTextField(); txtDerby.setText(csv.get(3)); txtDerby.setBackground(Color.GREEN); txtDerby.setBounds(582, 451, 90, 20); frame.getContentPane().add(txtDerby); txtDerby.setColumns(10); txtGlasgow = new JTextField(); txtGlasgow.setText(csv.get(4)); txtGlasgow.setBackground(Color.GREEN); txtGlasgow.setBounds(250, 94, 102, 20); frame.getContentPane().add(txtGlasgow); txtGlasgow.setColumns(10); txtFalkirk = new JTextField(); txtFalkirk.setText(csv.get(5)); txtFalkirk.setColumns(10); txtFalkirk.setBackground(Color.GREEN); txtFalkirk.setBounds(331, 41, 102, 20); frame.getContentPane().add(txtFalkirk); txtNewcastle = new JTextField(); txtNewcastle.setText(csv.get(6)); txtNewcastle.setColumns(10); txtNewcastle.setBackground(Color.GREEN); txtNewcastle.setBounds(424, 141, 111, 20); frame.getContentPane().add(txtNewcastle); txtLeeds = new JTextField(); txtLeeds.setText(csv.get(7)); txtLeeds.setColumns(10); txtLeeds.setBackground(Color.GREEN); txtLeeds.setBounds(481, 244, 102, 20); frame.getContentPane().add(txtLeeds); txtPreston = new JTextField(); txtPreston.setText(csv.get(8)); txtPreston.setColumns(10); txtPreston.setBackground(Color.GREEN); txtPreston.setBounds(356, 221, 102, 20); frame.getContentPane().add(txtPreston); txtManchester = new JTextField(); txtManchester.setText(csv.get(9)); txtManchester.setColumns(10); txtManchester.setBackground(Color.GREEN); txtManchester.setBounds(394, 394, 124, 20); frame.getContentPane().add(txtManchester); txtWolverhampton = new JTextField(); txtWolverhampton.setText(csv.get(10)); txtWolverhampton.setColumns(10); txtWolverhampton.setBackground(Color.GREEN); txtWolverhampton.setBounds(360, 486, 153, 20); frame.getContentPane().add(txtWolverhampton); txtBirmingham = new JTextField(); txtBirmingham.setText(csv.get(11)); txtBirmingham.setColumns(10); txtBirmingham.setBackground(Color.GREEN); txtBirmingham.setBounds(424, 553, 128, 20); frame.getContentPane().add(txtBirmingham); txtMiltonKeynes = new JTextField(); txtMiltonKeynes.setText(csv.get(12)); txtMiltonKeynes.setColumns(10); txtMiltonKeynes.setBackground(Color.GREEN); txtMiltonKeynes.setBounds(474, 604, 135, 20); frame.getContentPane().add(txtMiltonKeynes); txtPeterborough = new JTextField(); txtPeterborough.setText(csv.get(13)); txtPeterborough.setColumns(10); txtPeterborough.setBackground(Color.GREEN); txtPeterborough.setBounds(655, 576, 135, 20); frame.getContentPane().add(txtPeterborough); txtColindale = new JTextField(); txtColindale.setText(csv.get(14)); txtColindale.setColumns(10); txtColindale.setBackground(Color.GREEN); txtColindale.setBounds(541, 699, 107, 20); frame.getContentPane().add(txtColindale); txtStepneyGreen = new JTextField(); txtStepneyGreen.setText(csv.get(15)); txtStepneyGreen.setColumns(10); txtStepneyGreen.setBackground(Color.GREEN); txtStepneyGreen.setBounds(667, 699, 137, 20); frame.getContentPane().add(txtStepneyGreen); txtSlough = new JTextField(); txtSlough.setText(csv.get(16)); txtSlough.setColumns(10); txtSlough.setBackground(Color.GREEN); txtSlough.setBounds(525, 756, 102, 20); frame.getContentPane().add(txtSlough); txtFaraday = new JTextField(); txtFaraday.setText(csv.get(17)); txtFaraday.setColumns(10); txtFaraday.setBackground(Color.GREEN); txtFaraday.setBounds(650, 756, 102, 20); frame.getContentPane().add(txtFaraday); txtGuildford = new JTextField(); txtGuildford.setText(csv.get(18)); txtGuildford.setColumns(10); txtGuildford.setBackground(Color.GREEN); txtGuildford.setBounds(525, 822, 102, 20); frame.getContentPane().add(txtGuildford); txtSouthbank = new JTextField(); txtSouthbank.setText(csv.get(19)); txtSouthbank.setColumns(10); txtSouthbank.setBackground(Color.GREEN); txtSouthbank.setBounds(655, 807, 115, 20); frame.getContentPane().add(txtSouthbank); JLabel lblNewLabel = new JLabel("New label"); lblNewLabel.setForeground(Color.BLACK); lblNewLabel.setBackground(Color.BLACK); lblNewLabel .setIcon(new ImageIcon( "C:\\Users\\606854007\\workspace\\NetworkAppTest\\Test\\window\\England_Wales.gif")); lblNewLabel.setBounds(33, 11, 890, 1086); frame.getContentPane().add(lblNewLabel); new FileCheckerWorker(null).execute(); \\ if i dont but null in the '()' then it comes up with an error, \\and this just makes it execute: /** public FileCheckerWorker(MapTest mapTest) { this.mapTest = mapTest; } **/ \\ which is not what I want, I have tried to add commands \\to run the methods from within: \\ ' public FileCheckerWorker(MapTest mapTest)' method \\ but it gives me a null pointer exception, } }
下面是’FileCheckerWorker’课程，希望我做得对：p
package window; import java.io.BufferedReader; import java.io.File; import java.io.FileReader; import java.util.ArrayList; import java.util.List; import javax.swing.SwingWorker; public class FileCheckerWorker extends SwingWorker<Object, List> { private MapTest mapTest; public FileCheckerWorker(MapTest mapTest) { this.mapTest = mapTest; } @Override protected void process(List<List> chunks) { List values = chunks.get(chunks.size() - 1); mapTest.txtCardiff.setText(values.get(0)); mapTest.txtBristol.setText(values.get(1)); mapTest.txtSheffield.setText(values.get(2)); mapTest.txtDerby.setText(values.get(3)); mapTest.txtGlasgow.setText(values.get(4)); mapTest.txtFalkirk.setText(values.get(5)); mapTest.txtNewcastle.setText(values.get(6)); mapTest.txtLeeds.setText(values.get(7)); mapTest.txtPreston.setText(values.get(8)); mapTest.txtManchester.setText(values.get(9)); mapTest.txtWolverhampton.setText(values.get(10)); mapTest.txtBirmingham.setText(values.get(11)); mapTest.txtMiltonKeynes.setText(values.get(12)); mapTest.txtPeterborough.setText(values.get(13)); mapTest.txtColindale.setText(values.get(14)); mapTest.txtStepneyGreen.setText(values.get(15)); mapTest.txtSlough.setText(values.get(16)); mapTest.txtFaraday.setText(values.get(17)); mapTest.txtGuildford.setText(values.get(18)); mapTest.txtSouthbank.setText(values.get(19)); } @Override protected Object doInBackground() throws Exception { long lastUpdated = -1; File csvFile = new File("C:/Users/606854007/workspace/NetworkAppTest/Jar/window/Cardiff.txt"); while (true) { if (csvFile.lastModified() != lastUpdated) { BufferedReader csvReader = null; List values = new ArrayList(20); try { csvReader = new BufferedReader(new FileReader("C:/Users/606854007/workspace/NetworkAppTest/Jar/window/Cardiff.txt")); for (int index = 0; index < 20; index++) { values.add(mapTest.CSVFile.readLine()); } publish(values); lastUpdated = csvFile.lastModified(); } finally { try { csvReader.close(); } catch (Exception e) { } } Thread.sleep(5000); System.out.println("Check For Change"); } } } }
更新两个代码都是现在的代码。
此外，当我认为我的’doInBackground’工作时，如果在行value.add（mapTest.CSVFile.readLine（））上给了我一个NullPointerException;
看一下ScheduledExecutorService 。 使用此function，您可以安排一些定期任务。 （在你的情况下，每20秒将从文件中读取）。
在SwingWorker包装“查找”代码，使用Thread.sleep允许后台线程在给定时间段（例如20秒）内空闲。
加载文件的内容，确定它是否已更改，并使用pusblish方法将结果发送到process方法，这允许您使用Event Dispatching Thread处理结果
有关更多详细信息，请查看SwingWorker
简单的例子
public class PeriodicalWorker extends SwingWorker { private boolean running = true; public Object doInBackground() throws Exception { while (running) { try { Thread.sleep(20000); } catch (Exception exp) {} // Load the values... // Check to see if anything needs to updated... publish(values); // List of String array values } return null; } public void process(List values) { // Assign the values to the UI... } }
我确定你可以通过“停止”方法将running设置为false;）
更新
基本概念非常简单。 您需要跟踪文件上次更新的时间，如果值在睡眠之间发生变化，则需要重新读取文件并更新屏幕上的值。
在Java 7中，此过程变得相当容易，但在此之前，您可以使用File#lastModified来检查File#lastModified的上次修改日期/时间。
以下是简单的例子。
public class FileCheckerWorker extends SwingWorker> { @Override protected void process(List> chunks) { List values = chunks.get(chunks.size() - 1); txtCardiff.setText(values.get(0)); txtBristol.setText(values.get(1)); txtSheffield.setText(values.get(2)); txtDerby.setText(values.get(3)); txtGlasgow.setText(values.get(4)); txtFalkirk.setText(values.get(5)); txtNewcastle.setText(values.get(6)); txtLeeds.setText(values.get(7)); txtPreston.setText(values.get(8)); txtManchester.setText(values.get(9)); txtWolverhampton.setText(values.get(10)); txtBirmingham.setText(values.get(11)); txtMiltonKeynes.setText(values.get(12)); txtPeterborough.setText(values.get(13)); txtColindale.setText(values.get(14)); txtStepneyGreen.setText(values.get(15)); txtSlough.setText(values.get(16)); txtFaraday.setText(values.get(17)); txtGuildford.setText(values.get(18)); txtSouthbank.setText(values.get(19)); } @Override protected Object doInBackground() throws Exception { long lastUpdated = -1; File csvFile = new File("..."); while (true) { if (csvFile.lastModified() != lastUpdated) { BufferedReader csvReader = null; List values = new ArrayList (20); try { csvReader = new BufferedReader(new FileReader("...")); for (int index = 0; index < 20; index++) { values.add(CSVFile.readLine()); } publish(values); lastUpdated = csvFile.lastModified(); } finally { try { csvReader.close(); } catch (Exception e) { } } Thread.sleep(20000); } } } }
您可以使用new FileCheckerWorker.execute()将其置于initialise方法的末尾。
更新
而不是使您的字段static ，将MapTest的引用传递给worker ...
import java.awt.Color; import java.awt.EventQueue; import java.io.BufferedReader; import java.io.File; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.IOException; import java.util.ArrayList; import java.util.List; import javax.swing.ImageIcon; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JTextField; import javax.swing.SwingWorker; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; public class MapTest { private JFrame frame; protected JTextField txtCardiff; protected JTextField txtBristol; protected JTextField txtSheffield; protected JTextField txtDerby; protected JTextField txtGlasgow; protected JTextField txtFalkirk; protected JTextField txtNewcastle; protected JTextField txtLeeds; protected JTextField txtPreston; protected JTextField txtManchester; protected JTextField txtWolverhampton; protected JTextField txtBirmingham; protected JTextField txtMiltonKeynes; protected JTextField txtPeterborough; protected JTextField txtColindale; protected JTextField txtStepneyGreen; protected JTextField txtSlough; protected JTextField txtFaraday; protected JTextField txtGuildford; protected JTextField txtSouthbank; private BufferedReader CSVFile = new BufferedReader(new FileReader("C:/Users/606854007/workspace/NetworkAppTest/jar/window/Cardiff.txt")); ArrayList csv = new ArrayList (); public static void main(String[] args) { try { UIManager.setLookAndFeel( UIManager.getSystemLookAndFeelClassName()); } catch (Exception e1) { e1.printStackTrace(); } EventQueue.invokeLater(new Runnable() { public void run() { try { MapTest window = new MapTest(); window.frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); } /** * Create the application. * * @throws IOException */ public MapTest() throws IOException { try { initialize(); } catch (FileNotFoundException e) { e.printStackTrace(); } } /** * Initialise the contents of the frame. * * @param output * @throws IOException */ private void initialize() throws IOException { frame = new JFrame(); frame.setBounds(0, 0, 1000, 1086); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.getContentPane().setLayout(null); frame.setBackground(Color.CYAN); txtCardiff = new JTextField(); txtCardiff.setBackground(Color.GREEN); txtCardiff.setBounds(305, 699, 102, 20); frame.getContentPane().add(txtCardiff); txtCardiff.setColumns(10); txtBristol = new JTextField(); txtBristol.setBackground(Color.GREEN); txtBristol.setBounds(416, 780, 102, 20); frame.getContentPane().add(txtBristol); txtBristol.setColumns(10); txtSheffield = new JTextField(); txtSheffield.setBackground(Color.GREEN); txtSheffield.setBounds(517, 356, 110, 20); frame.getContentPane().add(txtSheffield); txtSheffield.setColumns(10); txtDerby = new JTextField(); txtDerby.setBackground(Color.GREEN); txtDerby.setBounds(582, 451, 90, 20); frame.getContentPane().add(txtDerby); txtDerby.setColumns(10); txtGlasgow = new JTextField(); txtGlasgow.setBackground(Color.GREEN); txtGlasgow.setBounds(250, 94, 102, 20); frame.getContentPane().add(txtGlasgow); txtGlasgow.setColumns(10); txtFalkirk = new JTextField(); txtFalkirk.setColumns(10); txtFalkirk.setBackground(Color.GREEN); txtFalkirk.setBounds(331, 41, 102, 20); frame.getContentPane().add(txtFalkirk); txtNewcastle = new JTextField(); txtNewcastle.setColumns(10); txtNewcastle.setBackground(Color.GREEN); txtNewcastle.setBounds(424, 141, 111, 20); frame.getContentPane().add(txtNewcastle); txtLeeds = new JTextField(); txtLeeds.setColumns(10); txtLeeds.setBackground(Color.GREEN); txtLeeds.setBounds(481, 244, 102, 20); frame.getContentPane().add(txtLeeds); txtPreston = new JTextField(); txtPreston.setColumns(10); txtPreston.setBackground(Color.GREEN); txtPreston.setBounds(356, 221, 102, 20); frame.getContentPane().add(txtPreston); txtManchester = new JTextField(); txtManchester.setColumns(10); txtManchester.setBackground(Color.GREEN); txtManchester.setBounds(394, 394, 124, 20); frame.getContentPane().add(txtManchester); txtWolverhampton = new JTextField(); txtWolverhampton.setColumns(10); txtWolverhampton.setBackground(Color.GREEN); txtWolverhampton.setBounds(360, 486, 153, 20); frame.getContentPane().add(txtWolverhampton); txtBirmingham = new JTextField(); txtBirmingham.setColumns(10); txtBirmingham.setBackground(Color.GREEN); txtBirmingham.setBounds(424, 553, 128, 20); frame.getContentPane().add(txtBirmingham); txtMiltonKeynes = new JTextField(); txtMiltonKeynes.setColumns(10); txtMiltonKeynes.setBackground(Color.GREEN); txtMiltonKeynes.setBounds(474, 604, 135, 20); frame.getContentPane().add(txtMiltonKeynes); txtPeterborough = new JTextField(); txtPeterborough.setColumns(10); txtPeterborough.setBackground(Color.GREEN); txtPeterborough.setBounds(655, 576, 135, 20); frame.getContentPane().add(txtPeterborough); txtColindale = new JTextField(); txtColindale.setColumns(10); txtColindale.setBackground(Color.GREEN); txtColindale.setBounds(541, 699, 107, 20); frame.getContentPane().add(txtColindale); txtStepneyGreen = new JTextField(); txtStepneyGreen.setColumns(10); txtStepneyGreen.setBackground(Color.GREEN); txtStepneyGreen.setBounds(667, 699, 137, 20); frame.getContentPane().add(txtStepneyGreen); txtSlough = new JTextField(); txtSlough.setColumns(10); txtSlough.setBackground(Color.GREEN); txtSlough.setBounds(525, 756, 102, 20); frame.getContentPane().add(txtSlough); txtFaraday = new JTextField(); txtFaraday.setColumns(10); txtFaraday.setBackground(Color.GREEN); txtFaraday.setBounds(650, 756, 102, 20); frame.getContentPane().add(txtFaraday); txtGuildford = new JTextField(); txtGuildford.setColumns(10); txtGuildford.setBackground(Color.GREEN); txtGuildford.setBounds(525, 822, 102, 20); frame.getContentPane().add(txtGuildford); txtSouthbank = new JTextField(); txtSouthbank.setColumns(10); txtSouthbank.setBackground(Color.GREEN); txtSouthbank.setBounds(655, 807, 115, 20); frame.getContentPane().add(txtSouthbank); JLabel lblNewLabel = new JLabel("New label"); lblNewLabel.setForeground(Color.BLACK); lblNewLabel.setBackground(Color.BLACK); lblNewLabel.setIcon(new ImageIcon( "C:\\Users\\606854007\\workspace\\NetworkAppTest\\Test\\window\\England_Wales.gif")); lblNewLabel.setBounds(33, 11, 890, 1086); frame.getContentPane().add(lblNewLabel); new FileCheckerWorker(this).execute(); } public class FileCheckerWorker extends SwingWorker> { private MapTest mapTest; public FileCheckerWorker(MapTest mapTest) { this.mapTest = mapTest; } @Override protected void process(List> chunks) { List values = chunks.get(chunks.size() - 1); mapTest.txtCardiff.setText(values.get(0)); mapTest.txtBristol.setText(values.get(1)); mapTest.txtSheffield.setText(values.get(2)); mapTest.txtDerby.setText(values.get(3)); mapTest.txtGlasgow.setText(values.get(4)); mapTest.txtFalkirk.setText(values.get(5)); mapTest.txtNewcastle.setText(values.get(6)); mapTest.txtLeeds.setText(values.get(7)); mapTest.txtPreston.setText(values.get(8)); mapTest.txtManchester.setText(values.get(9)); mapTest.txtWolverhampton.setText(values.get(10)); mapTest.txtBirmingham.setText(values.get(11)); mapTest.txtMiltonKeynes.setText(values.get(12)); mapTest.txtPeterborough.setText(values.get(13)); mapTest.txtColindale.setText(values.get(14)); mapTest.txtStepneyGreen.setText(values.get(15)); mapTest.txtSlough.setText(values.get(16)); mapTest.txtFaraday.setText(values.get(17)); mapTest.txtGuildford.setText(values.get(18)); mapTest.txtSouthbank.setText(values.get(19)); } @Override protected Object doInBackground() throws Exception { long lastUpdated = -1; File csvFile = new File("C:/Users/606854007/workspace/NetworkAppTest/Jar/window/Cardiff.txt"); while (true) { if (csvFile.lastModified() != lastUpdated) { BufferedReader csvReader = null; List values = new ArrayList (20); try { csvReader = new BufferedReader(new FileReader("C:/Users/606854007/workspace/NetworkAppTest/Jar/window/Cardiff.txt")); for (int index = 0; index < 20; index++) { values.add(mapTest.CSVFile.readLine()); } publish(values); lastUpdated = csvFile.lastModified(); } finally { try { csvReader.close(); } catch (Exception e) { } } Thread.sleep(5000); System.out.println("Check For Change"); } } } } }