如何将Text字段的值设置为等于JTable单元格

Question

I am trying to update the value of the JTextFiwld to be equal to JTable cell one of the user told me to use setText() but this is not the way java going to recognize the cell even if he did how he will get the value from the cell and update it to the JTextField because every row have 3 cells also I am using SwingWorker to read files then show the information in the JTable then the information should be showing in the text field do I have to use ActionListener or what?

public class GuiInterface extends JFrame {
    String[] columnNames = {"#", "Start", "End", "Translation column"};


    ReadFile reader;
    private final int numberOfButton = 6;
    private final JTable table;
    JToolBar toolBar;
    private final JTextField enterText,startTime,endTime;
    private final JMenu jMenu1,jMenu2,jMenu3;
    private final JMenuBar jMenuBar1;
    private final JMenuItem itemNewSrt,itemOpenVideo,itemSavefile;
    private static JFileChooser ourFileSelector,ourVideoSelector;
    File ourVideoFile,ourSrtFile;
    Border Campound,empty,Boveld,etch;
    private final JLabel startTimeingLable,endTimeingLabel;
    public static String  mediaPath="",srtPath="";
    Canvas c;
    ImageIcon[] icon;
    JButton[] Obutton;
   static final int COLUMN = 4 ; 



         public static void main(String[] args) throws IOException 
       {
           //ReadFile.readSubtitles();
        NativeLibrary.addSearchPath(RuntimeUtil.getLibVlcLibraryName(), "C:\\Program Files\\VideoLAN\\VLC");
        Native.loadLibrary(RuntimeUtil.getLibVlcLibraryName(), LibVlc.class);
          SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                new GuiInterface("");

            }

        });

}



    public GuiInterface(String title){

    //reader = new ReadFile();

    setSize(1024, 720);
    setVisible(true);
    setTitle("AnimeFactor");
    setDefaultCloseOperation(GuiInterface.EXIT_ON_CLOSE);
    //video setting 
    MediaPlayerFactory mediaPlayerFactory = new MediaPlayerFactory();
    c = new Canvas();
    c.setBackground(Color.black);
    JPanel p = new JPanel();
    p.setLayout(new BorderLayout());
    p.add(c, BorderLayout.CENTER);
    add(p, BorderLayout.CENTER);
    EmbeddedMediaPlayer mediaPlayer = mediaPlayerFactory.newEmbeddedMediaPlayer();
    mediaPlayer.setVideoSurface(mediaPlayerFactory.newVideoSurface(c));
    mediaPlayer.playMedia("C:\\Users\\isslam\\Downloads\\gg.mp4");
    table = new JTable(new DefaultTableModel(columnNames, 0));
    table.setFillsViewportHeight(true);
    table.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);
    TableColumn columnA = table.getColumn("#");
    columnA.setMinWidth(10);
    columnA.setMaxWidth(40);
    TableColumn columnB= table.getColumn("Start");
    columnB.setMinWidth(80);
    columnB.setMaxWidth(90);
    TableColumn columnC= table.getColumn("End");
    columnC.setMinWidth(80);
    columnC.setMaxWidth(90);


    ImageIcon openIcon = new ImageIcon(
                GuiInterface.class.getResource("/resources/image/folder-icon.png"));
        ImageIcon saveIcon = new ImageIcon(
                GuiInterface.class.getResource("/resources/image/red-disk-icon.png"));
        ImageIcon newIcon = new ImageIcon(
                GuiInterface.class.getResource("/resources/image/Actionsnew-icon.png"));




        Action openAction = new AbstractAction("Open Subtitle", openIcon) {
            @Override
            public void actionPerformed(ActionEvent e) {
                ourFileSelector.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
                ourFileSelector.showSaveDialog(null);
                ourSrtFile =  ourFileSelector.getSelectedFile();
                srtPath = ourSrtFile.getAbsolutePath();
                Worker p = new Worker(srtPath, table);
                p.execute();
            }
        };

        Action saveAction = new AbstractAction("Save", saveIcon) {
            @Override
            public void actionPerformed(ActionEvent e) {

            }
        };
        Action newAction = new AbstractAction("New", newIcon) {
            @Override
            public void actionPerformed(ActionEvent e) {
                System.out.println("New File");
            }
        };
    jMenu1 = new JMenu("File");
    jMenu2 = new JMenu("Video");
    jMenu3 = new JMenu("Subtitle");
    itemNewSrt = new JMenuItem(newAction);
    jMenu1.add(itemNewSrt);
    itemSavefile = new JMenuItem(saveAction);
    jMenu1.add(itemSavefile);
    jMenuBar1 = new JMenuBar();
    jMenuBar1.setBorder(etch);
    setJMenuBar(jMenuBar1);
    jMenuBar1.add(jMenu1);
    jMenuBar1.add(jMenu2);
    jMenuBar1.add(jMenu3);
    ourFileSelector = new JFileChooser();

    Obutton = new JButton[numberOfButton];
    etch = BorderFactory.createEtchedBorder();
    //starting and ending time
    enterText = new JTextField();
    enterText.setPreferredSize(new Dimension(0,100));
    startTime = new JTextField("0:00:00.00 ");

    startTime.setPreferredSize(new Dimension(120, 20));
    startTimeingLable = new JLabel("Starting Time");
    endTimeingLabel = new JLabel("Ending Time");
    endTime = new JTextField("0:00:00.00 ");
    endTime.setPreferredSize(new Dimension(120, 20));
    //end of start and ending time filed

        toolBar = new JToolBar();
        toolBar.setBorder(new LineBorder(Color.LIGHT_GRAY, 1));
        toolBar.add(newAction);
        toolBar.add(saveAction);


        JPanel toolBarPane = new JPanel(new BorderLayout());
        toolBarPane.add(toolBar,BorderLayout.NORTH);

        JPanel timing = new JPanel(new FlowLayout(FlowLayout.TRAILING));
        timing.add(startTimeingLable);
        timing.add(startTime);
        timing.add(endTimeingLabel);
        timing.add(endTime);


        empty = BorderFactory.createEmptyBorder(30, 5, 5, 5);
        Boveld = BorderFactory.createBevelBorder(BevelBorder.RAISED);
        Campound = BorderFactory.createCompoundBorder(empty,Boveld);


        JPanel textFiled = new JPanel(new BorderLayout());
        textFiled.add(timing);
        textFiled.add(enterText,BorderLayout.SOUTH);
        textFiled.setBorder(Campound);
        JScrollPane scrollPane = new JScrollPane(table);
        add(scrollPane, BorderLayout.SOUTH);
        add(textFiled, BorderLayout.EAST);
        add(toolBarPane,BorderLayout.PAGE_START);





       toolBar.add(openAction);
       itemOpenVideo = new JMenuItem(openAction);
       jMenu1.add(itemOpenVideo);
       //itemOpenVideo.addActionListener(new MenuBarMethod());
       JPopupMenu.setDefaultLightWeightPopupEnabled(false); 
        ToolTipManager.sharedInstance().setLightWeightPopupEnabled(false);

    }


     class Worker extends SwingWorker<DefaultTableModel, Void> {
       private final String srtPath;
       private final JTable table;
       DefaultTableModel model;
        public Worker(String srtPath, JTable table) {
                this.srtPath = srtPath;
                this.table = table;
             }


     @Override
      protected DefaultTableModel doInBackground() {
     model = new DefaultTableModel(columnNames, 0);
    ArrayList<String> ends = ReadFile.getFileEndingTime(srtPath);
    ArrayList<String> starts = ReadFile.getFileStartingTime(srtPath);
    ArrayList<String> subs = ReadFile.readSubtitles(srtPath);
    ArrayList<String> lins = ReadFile.ArraylineLengths(srtPath);
    for (int i = 0; i < ReadFile.maxLine(srtPath); i++) {
        model.addRow(new Object[] {lins.get(i), starts.get(i), ends.get(i), subs.get(i)});
    }
    return model;
}
    @Override
     protected void done() {
    table.setModel(model);
    table.setFillsViewportHeight(true);
    table.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);
    TableColumn columnA = table.getColumn("#");
    columnA.setMinWidth(10);
    columnA.setMaxWidth(40);
    TableColumn columnB= table.getColumn("Start");
    columnB.setMinWidth(80);
    columnB.setMaxWidth(90);
    TableColumn columnC= table.getColumn("End");
    columnC.setMinWidth(80);
    columnC.setMaxWidth(90);
}
}



public class MenuBarMethod implements ActionListener{

    @Override
    public void actionPerformed(ActionEvent a){
        Object buttonPressed=a.getSource();
       if(buttonPressed.equals(itemOpenVideo)){
        ourVideoSelector.setFileSelectionMode(JFileChooser.FILES_ONLY);
        ourVideoSelector.showSaveDialog(null);
        ourVideoFile = ourVideoSelector.getSelectedFile();
        mediaPath = ourVideoFile.getAbsolutePath();
       }
    }

}

}   

Answer 1

Start by adding a ListSelectionListener to the table...

table.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
    public void valueChanged(ListSelectionEvent e) {
    }
});

This will let you know when the row selection has changed.

In the valueChanged method, you want to determine which row has been selected...

int row = table.getSelectedRow();

Then you will want to get the value for the specified column...

Object value = table.getValueAt(row, 0); 
// 0 represents the first column, change per your requirements...

Now, assuming that the value is simply a String you could simply use something like...

enterText.setText(value == null ? null : value.toString());

If the value is an Object of some other type, you need to cast it first and extract the required information

See How to Use Tables for more details