JFormattedTextField Component in Java

Submitted by donbermoy on Monday, November 17, 2014 - 11:52.

This is a tutorial in which we will going to create a program that has the JFormattedTextField Component using Java. The JFormattedTextField is a component is used to let the user to specify the valid set of characters that can be typed in a text field with some formatting. So, now let's start this tutorial! 1. Open JCreator or NetBeans and make a java program with a file name of jFormattedTextFieldComponent.java. 2. Import the following packages:

import java.text.*; //used to access the ParseException class in text
import javax.swing.*; // used to access the JFrame and JFormattedTextField class
import javax.swing.text.*; //used to access the MaskFormatter class of the swing text

3. First throw a ParseException in your Main to get access to the MaskFormatter that we will be using. Create variables below for the JFrame, MaskFormatter, and JFormattedTextField component.

    JFrame frame = new JFrame("JFormattedTextField Component");
    MaskFormatter fmt = new MaskFormatter("####-###-####");
    JFormattedTextField tft1 = new JFormattedTextField(fmt);

We used variable frame for the JFrame class with the title JFormattedTextField Component. The MaskFormatter class above indicates exactly which characters are valid in each position of the field's text as we have the formatter of a phone number. Then we used the JFormattedTextField component to put inside there the variable fmt of the MaskFormatter. 4. Now, add the JFormattedTextField to the frame using the default BorderLayout of South position of the getContentPane method. Have this code below:

frame.getContentPane().add(tft1, "South");

5. Lastly, set the size, visibility, and the close operation of the frame.

    frame.setSize(250, 100);
    frame.setVisible(true);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Output: output

Here's the full code of this tutorial:

import java.text.*; //used to access the ParseException class in text
import javax.swing.*; // used to access the JFrame and JFormattedTextField class
import javax.swing.text.*; //used to access the MaskFormatter class of the swing text
 
public class jFormattedTextFieldComponent {
        
  public static void main(final String args[]) throws ParseException {
    JFrame frame = new JFrame("JFormattedTextField Component");
    MaskFormatter fmt = new MaskFormatter("####-###-####");
    JFormattedTextField tft1 = new JFormattedTextField(fmt);
    
    frame.getContentPane().add(tft1, "South");
 
 
    frame.setSize(250, 100);
    frame.setVisible(true);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  }
}

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