Java File Chooser Simple Application

import javax.swing.JFileChooser;
/*
import weka.core.converters.ConverterUtils.DataSource;
import weka.core.converters.XRFFSaver;
import weka.core.Instances;
*/

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
/*
 * mainFrm.java
 *
 * Created on 2007年8月13日, 下午8:43
 */

/**
 *
 * @author  Peng
 */
public class mainFrm extends javax.swing.JFrame {
    JFileChooser fileChooser = null;
    
    /** Creates new form mainFrm */
    public mainFrm() {
        initComponents();
    }
    
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc=" 生成的代码 ">                          
    private void initComponents() {
        lblArffFile = new javax.swing.JLabel();
        lblTxtFile = new javax.swing.JLabel();
        txtFieldArff = new javax.swing.JTextField();
        txtFieldTXT = new javax.swing.JTextField();
        jLabel1 = new javax.swing.JLabel();
        txtFieldXRFF = new javax.swing.JTextField();
        btnConvert = new javax.swing.JButton();
        btnArffChooser = new javax.swing.JButton();
        btnTXTChooser = new javax.swing.JButton();
        btnSaveXRFF = new javax.swing.JButton();
        lblStatus = new javax.swing.JLabel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("XRFF=ARFF+TXT");
        lblArffFile.setText("ARFF File: ");

        lblTxtFile.setText("TXT File: ");

        jLabel1.setText("XRFF File: ");

        btnConvert.setText("Convert");
        btnConvert.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnConvertActionPerformed(evt);
            }
        });

        btnArffChooser.setText("Browse");
        btnArffChooser.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnArffChooserActionPerformed(evt);
            }
        });

        btnTXTChooser.setText("Browse");
        btnTXTChooser.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnTXTChooserActionPerformed(evt);
            }
        });

        btnSaveXRFF.setText("Save to");
        btnSaveXRFF.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnSaveXRFFActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addContainerGap()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addGroup(layout.createSequentialGroup()
                                .addComponent(lblArffFile)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addComponent(txtFieldArff, javax.swing.GroupLayout.PREFERRED_SIZE, 209, javax.swing.GroupLayout.PREFERRED_SIZE))
                            .addGroup(layout.createSequentialGroup()
                                .addComponent(lblTxtFile)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addComponent(txtFieldTXT))
                            .addGroup(layout.createSequentialGroup()
                                .addComponent(jLabel1)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addComponent(txtFieldXRFF))))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(116, 116, 116)
                        .addComponent(btnConvert, javax.swing.GroupLayout.PREFERRED_SIZE, 115, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(lblStatus, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(btnTXTChooser, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(btnArffChooser, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(btnSaveXRFF, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(lblArffFile)
                    .addComponent(txtFieldArff, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnArffChooser))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(lblTxtFile)
                    .addComponent(btnTXTChooser)
                    .addComponent(txtFieldTXT, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1)
                    .addComponent(btnSaveXRFF)
                    .addComponent(txtFieldXRFF, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(btnConvert)
                    .addComponent(lblStatus))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        pack();
    }// </editor-fold>                        
    
    private void btnConvertActionPerformed(java.awt.event.ActionEvent evt) {                                           
// TODO 将在此处添加您的处理代码：
/*
        try{
            // load data
            DataSource source = new DataSource(txtFieldArff.getText());
            Instances data = source.getDataSet();
            if (data.classIndex() == -1)
                data.setClassIndex(data.numAttributes() - 1);
            
            // read and set weights
            BufferedReader reader = new BufferedReader(new FileReader(txtFieldTXT.getText()));
            for (int i = 0; i < data.numInstances(); i++) {
                String line = reader.readLine();
                double weight = Double.parseDouble(line);
                data.instance(i).setWeight(weight);
            }
            reader.close();
            
            // save data
            XRFFSaver saver = new XRFFSaver();
            saver.setFile(new File(txtFieldXRFF.getText()));
            saver.setInstances(data);
            saver.writeBatch();
            lblStatus.setText("Done");
        }catch(Exception e){
            e.printStackTrace();
            lblStatus.setText("Error");
        }
*/
        
    }                                          
    
    private void btnSaveXRFFActionPerformed(java.awt.event.ActionEvent evt) {                                            
// TODO 将在此处添加您的处理代码：
        fileChooser = new JFileChooser();
        //int arffOpt = arffChooser.showOpenDialog(this);
        fileChooser.showSaveDialog(this);
        txtFieldXRFF.setText(fileChooser.getSelectedFile().getPath());
    }                                           
    
    private void btnTXTChooserActionPerformed(java.awt.event.ActionEvent evt) {                                              
// TODO 将在此处添加您的处理代码：
        fileChooser = new JFileChooser();
        //int arffOpt = arffChooser.showOpenDialog(this);
        fileChooser.showOpenDialog(this);
        txtFieldTXT.setText(fileChooser.getSelectedFile().getPath());
    }                                             
    
    private void btnArffChooserActionPerformed(java.awt.event.ActionEvent evt) {                                               
// TODO 将在此处添加您的处理代码：
        fileChooser = new JFileChooser();
        //int arffOpt = arffChooser.showOpenDialog(this);
        fileChooser.showOpenDialog(this);
        txtFieldArff.setText(fileChooser.getSelectedFile().getPath());
    }                                              
    
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new mainFrm().setVisible(true);
            }
        });
    }
    
    // 变量声明 - 不进行修改                     
    private javax.swing.JButton btnArffChooser;
    private javax.swing.JButton btnConvert;
    private javax.swing.JButton btnSaveXRFF;
    private javax.swing.JButton btnTXTChooser;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel lblArffFile;
    private javax.swing.JLabel lblStatus;
    private javax.swing.JLabel lblTxtFile;
    private javax.swing.JTextField txtFieldArff;
    private javax.swing.JTextField txtFieldTXT;
    private javax.swing.JTextField txtFieldXRFF;
    // 变量声明结束                   
    
}