Word Checker in Java

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import java.io.*; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Calendar; import java.awt.*; import java.awt.event.*; import javax.swing.*;   public class FileChooser extends JPanel implements ActionListener {    /**   *   */  private static final long serialVersionUID = 1L;    public static void main(String[] args) {   // Schedule a job for the event dispatch thread:   // creating and showing this application's GUI.   SwingUtilities.invokeLater(new Runnable() {    public void run() {     // Turn off metal's use of bold fonts     UIManager.put("swing.boldMetal", Boolean.FALSE);     createAndShowGUI();    }   });  }    static private final String newline = "\n";  static public File file = null;  JButton openButton, checkButton, loadToExcel, Clear;  JTextArea log;  JFileChooser fc;  JTextField textField;  ArrayList<string> msgstorer;  boolean foundFlag = false;  String text = null;    @SuppressWarnings("deprecation")  public FileChooser() {   super(new BorderLayout());     // Create the log first, because the action listeners   // need to refer to it.   log = new JTextArea(5, 20);   log.setMargin(new Insets(5, 5, 5, 5));   log.setEditable(false);   JScrollPane logScrollPane = new JScrollPane(log);     // Create a file chooser   fc = new JFileChooser();     // Uncomment one of the following lines to try a different   // file selection mode. The first allows just directories   // to be selected (and, at least in the Java look and feel,   // shown). The second allows both files and directories   // to be selected. If you leave these lines commented out,   // then the default mode (FILES_ONLY) will be used.   //   fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);   // fc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);     // Create the open button. We use the image from the JLF   // Graphics Repository (but we extracted it from the jar).   openButton = new JButton("Open a Folder...",     createImageIcon("images/open1.gif"));   openButton.addActionListener(this);     // Create the save button. We use the image from the JLF   // Graphics Repository (but we extracted it from the jar).   checkButton = new JButton("Check  the Files...",     createImageIcon("images/check1.gif"));   checkButton.addActionListener(this);   textField = new JTextField(50);     loadToExcel = new JButton("Load to CSV",     createImageIcon("images/csv.gif"));   loadToExcel.addActionListener(this);   // For layout purposes, put the buttons in a separate panel   JPanel buttonPanel = new JPanel(); // use FlowLayout   buttonPanel.add(openButton);   buttonPanel.add(textField);   buttonPanel.add(checkButton);     Clear = new JButton("Clear", createImageIcon("images/ee.gif"));   Clear.addActionListener(this);     JPanel buttonPanel2 = new JPanel();   buttonPanel2.add(loadToExcel);   buttonPanel2.add(Clear);     // Add the buttons and the log to this panel.   add(buttonPanel, BorderLayout.PAGE_START);   add(logScrollPane, BorderLayout.CENTER);   add(buttonPanel2, BorderLayout.PAGE_END);     checkButton.setEnabled(false);   loadToExcel.setEnabled(false);   textField.disable();    }    @SuppressWarnings("deprecation")  public void actionPerformed(ActionEvent e) {     // Handle open button action.   if (e.getSource() == openButton) {    int returnVal = fc.showOpenDialog(FileChooser.this);      if (returnVal == JFileChooser.APPROVE_OPTION) {     file = fc.getSelectedFile();       // This is where a real application would open the file.     log.append("Opening: " + file + "." + newline);    } else {     log.append("Open command cancelled by user." + newline);    }    log.setCaretPosition(log.getDocument().getLength());    checkButton.setEnabled(true);    textField.enable();    textField      .setText("Enter the word(s)/symbol(s) you want to find here");    textField.requestFocus();    textField.selectAll();    // Handle check button action.   } else if (e.getSource() == checkButton) {    try {     msgstorer = new ArrayList<string>();       text = textField.getText();     File folder = new File(file.toString());     File[] listOfFiles = folder.listFiles();     String[] fileStore = new String[listOfFiles.length];     log.append("Searching " + text       + " in the following file(s) were started:" + newline);       for (int c = 0; c < listOfFiles.length; c++) {      log.append(listOfFiles[c].getName() + newline);        fileStore[c] = file.toString() + '\\'        + listOfFiles[c].getName();       }     for (int i = 0; i < fileStore.length; i++) {      String filer = fileStore[i];        File file = new File(filer);      FileChooser fd = new FileChooser();      String s = fd.getContents(file);        String fc = s.toLowerCase();        if (fc.contains(text.toLowerCase())) {       foundFlag = true;       msgstorer.add(listOfFiles[i].getName());      }       }     if (foundFlag) {      log.append("The following file contains  '" + text + "':\n");      loadToExcel.setEnabled(true);     } else {      log.append("None of the file contains  '" + text        + "' !!!\n");      loadToExcel.setEnabled(false);     }     for (int g = 0; g < msgstorer.size(); g++)      log.append(msgstorer.get(g) + newline);      } catch (Exception e1) {     // TODO Auto-generated catch block      }   } else if (e.getSource() == loadToExcel) {    try {     Calendar currentDate = Calendar.getInstance();     SimpleDateFormat formatter = new SimpleDateFormat(       "dd-MMM-yyy HH_mm_ss");     String dateNow = formatter.format(currentDate.getTime());       String chdir = file.toString() + '\\' + "output";     File directmkr = new File((chdir));     directmkr.mkdirs();     String outputfile = file.toString() + '\\' + "output" + '\\'       + "result " + dateNow + ".csv";     File creator = new File(outputfile);     log.append("Creating" + outputfile + newline);     log.append("Adding the following Details to output file:"       + newline);     FileWriter op = new FileWriter(creator);     BufferedWriter bop = new BufferedWriter(op);     bop.write("File Name(s) Containing '" + text + "'");     bop.newLine();       for (int g = 0; g < msgstorer.size(); g++) {      String path = file.toString() + '\\' + msgstorer.get(g);        bop.write(path + newline);        log.append(path + newline);       }       bop.close();     log.append(newline + "Check the file: " + outputfile       + "  for the result" + newline);    } catch (IOException e1) {       e1.printStackTrace();    }   }     else if (e.getSource() == Clear) {    log.setText("");     }    }    /** Returns an ImageIcon, or null if the path was invalid. */  protected static ImageIcon createImageIcon(String path) {   java.net.URL imgURL = FileChooser.class.getResource(path);   if (imgURL != null) {    return new ImageIcon(imgURL);   } else {    System.err.println("Couldn't find file: " + path);    return null;   }  }    /**   * Create the GUI and show it. For thread safety, this method should be   * invoked from the event dispatch thread.   */  private static void createAndShowGUI() {   // Create and set up the window.   JFrame frame = new JFrame("Word Checker");   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);     // Add content to the window.   frame.add(new FileChooser());     // Display the window.   frame.pack();   frame.setVisible(true);  }    public String getContents(File aFile) {   StringBuilder contents = new StringBuilder();   try {    BufferedReader input = new BufferedReader(new FileReader(aFile));    try {     String line = null; // not declared within while loop     while ((line = input.readLine()) != null) {      contents.append(line);      contents.append(System.getProperty("line.separator"));     }    } finally {     input.close();    }   } catch (IOException ex) {    // message   }     return contents.toString();  }   } </string></string>