Modifying Text in a JTextComponent - Java Swing

Java examples for Swing:JTextComponent

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Description

Modifying Text in a JTextComponent

Demo Code

import javax.swing.JTextField;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import javax.swing.text.JTextComponent;

public class Main {
  public static void main(String[] args) throws Exception {
    // Create the text component
    JTextComponent textComp = new JTextField("Initial Text");
    Document doc = textComp.getDocument();

    try {//from   w w  w .  ja  v  a  2s . co m
      // Insert some text at the beginning
      int pos = 0;
      doc.insertString(pos, "some text", null);

      // Insert some text after the 5th character
      pos = 5;
      doc.insertString(pos, "some text", null);

      // Append some text
      doc.insertString(doc.getLength(), "some text", null);

      // Delete the first 5 characters
      pos = 0;
      int len = 5;
      doc.remove(pos, len);

      // Replace the first 3 characters with some text
      pos = 0;
      len = 3;
      doc.remove(pos, len);
      doc.insertString(pos, "new text", null);
    } catch (BadLocationException e) {
    }
  }
}

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