JFormattedTextField + SimpleDateFormat

[Ralphw]

Hi *

i am creating a Dateformat with "YYYY" a set the Dateformatter into the JFormattedTextField.

I expected a text field where i can only edit 4 digits.
But i can put in even more digits.

Whats wrong ?

import java.awt.BorderLayout;
import java.text.SimpleDateFormat;
 
import javax.swing.JFormattedTextField;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.text.DateFormatter;
 
public class JFormattedTF extends JFrame {
 
  public JFormattedTF() {
    JPanel panel = new JPanel();
    JLabel label = new JLabel("Year :");
    SimpleDateFormat yearFormat = new SimpleDateFormat("yyyy");
    DateFormatter df = new DateFormatter(yearFormat);
    JFormattedTextField tf = new JFormattedTextField(df);
    ((DateFormatter)tf.getFormatter()).setAllowsInvalid(false);
    tf.setColumns(4);
    panel.add(label);
    panel.add(tf);
    getContentPane().add(panel, BorderLayout.SOUTH);
    pack();
  }
 
  public static void main(String[] args) {
    JFormattedTF tfe = new JFormattedTF();
    tfe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    tfe.setVisible(true);
  }
}  
     

[RamyaSivakanth]

Hi,
I think no methods are avilable in the api.You have to check like this below

if(tf.getText().length() > 4 )

-Regards
Ramya