CODEWITHSUNDEEP
javaswinggettextjtextpane
user1845954
user1845954

Reputation: 83

Cannot get text from JTextPane

So I have a JTextPane, and I have a method that returns a String containing the text in the JTextPane. I have been trying to fix this for weeks. The getText() method returns a blank line. I tried getting the document length, but that returns 0.

Here is the code:

import java.awt.*;
import javax.swing.*;

public class CodeTabs extends JTabbedPane {
    private JTextPane codearea;
    private JScrollPane scroll;

    public CodeTabs() {
        setTabPlacement(JTabbedPane.BOTTOM);

        codearea = new JTextPane();

        scroll = new JScrollPane(codearea, ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED, ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        scroll.setPreferredSize(new Dimension(Toolkit.getDefaultToolkit().getScreenSize()));

        addTab("Code", scroll);
    }

    public String getCode() {
        String s = codearea.getText();

        System.out.println(s);

        return s;
    }
}

Upvotes: 0

Views: 3982

Answers (2)

Robin
Robin

Reputation: 36601

I took your code and added a main method and a button to trigger the getCode() method. Everything works as expected. When I type something in the text area, it gets printed when I press the button.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class CodeTabs extends JTabbedPane {
  private JTextPane codearea;
  private JScrollPane scroll;

  public CodeTabs() {
    setTabPlacement(JTabbedPane.BOTTOM);

    codearea = new JTextPane();

    scroll = new JScrollPane(codearea, ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED, ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);
    scroll.setPreferredSize(new Dimension(  300,300 ));

    JPanel panel = new JPanel( new BorderLayout() );
    panel.add( scroll, BorderLayout.CENTER );
    JButton comp = new JButton( "Print text" );
    comp.addActionListener( new ActionListener() {
      @Override
      public void actionPerformed( ActionEvent e ) {
        getCode();
      }
    } );
    panel.add( comp, BorderLayout.SOUTH );

    addTab( "Code", panel );
  }

  public String getCode() {
    String s = codearea.getText();

    System.out.println(s);

    return s;
  }

  public static void main( String[] args ) {
    EventQueue.invokeLater( new Runnable() {
      @Override
      public void run() {
        JFrame frame = new JFrame( "TestFrame" );
        frame.getContentPane().add( new CodeTabs() );
        frame.setDefaultCloseOperation( WindowConstants.EXIT_ON_CLOSE );
        frame.pack();
        frame.setVisible( true );
      }
    } );
  }
}

Note: there is no need to extend JTabbedPane. Use it instead of extending it (I left it in the code posted in this answer to match your code as closely as possible)

Upvotes: 2

Siva Charan
Siva Charan

Reputation: 18064

Do this way:-

codearea.getDocument().getText(0, codearea.getDocument().getLength());

Upvotes: 0

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