Source Code : Format and validate input field in Java Swing

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Format and validate input field in Java Swing

   

import java.awt.BorderLayout;
import java.text.NumberFormat;

import javax.swing.JButton;
import javax.swing.JFormattedTextField;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class Main extends JFrame {

  public Main() {
    JPanel panel = new JPanel();
    JLabel label = new JLabel("Number :");
    JFormattedTextField tf = new JFormattedTextField(NumberFormat.getIntegerInstance());

    tf.setColumns(10);
    panel.add(label);
    panel.add(tf);
    JButton button = new JButton("Click Me");
    panel.add(button);
    getContentPane().add(panel, BorderLayout.SOUTH);
    pack();
  }

  public static void main(String[] args) {
    Main tfe = new Main();
    tfe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    tfe.setVisible(true);
  }
}

   
    
    
  

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