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Get Current Caret Position in JTextField Example

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  1. /*
  2.         Get Current Caret Position in JTextField Example
  3.         This java example shows how to get current position of caret in JTextField
  4.         using Java Swing JTextField class.
  5. */
  6.  
  7.  
  8. import java.awt.FlowLayout;
  9.  
  10. import javax.swing.JApplet;
  11. import javax.swing.JTextField;
  12. import javax.swing.event.CaretEvent;
  13. import javax.swing.event.CaretListener;
  14.  
  15. /*
  16. <applet code="GetCaretPositionInJTextFieldExample" width=200 height=200>
  17. </applet>
  18. */
  19.  
  20. /*
  21.  * Implement CaretListener in order to listen for caret position
  22.  * change event.
  23.  */
  24. public class GetCaretPositionInJTextFieldExample extends JApplet implements CaretListener{
  25.        
  26.         public void init(){
  27.                
  28.                 //set flow layout for the applet
  29.                 this.getContentPane().setLayout(new FlowLayout());
  30.                
  31.                 //create new JTextField
  32.                 JTextField field = new JTextField("JTextField Caret Position Example");
  33.                
  34.                 add(field);
  35.                
  36.                 //add CaretListener in order to listen for caret position changes
  37.                 field.addCaretListener(this);
  38.         }
  39.  
  40.         //override caretUpdate event to capture caret position changes
  41.         public void caretUpdate(CaretEvent e) {
  42.                
  43.                 /*
  44.                  * To get the current position of caret use,
  45.                  * int getDot()
  46.                  * method of CaretEvent class.
  47.                  */
  48.                
  49.                 int position = e.getDot();
  50.                
  51.                 //show current position in the status bar of an applet
  52.                 getAppletContext().showStatus("Caret Position :" + position);
  53.         }
  54.  
  55.        
  56. }