Hi Friend,

Try the following code:

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.*;
import java.text.*;
import java.util.regex.*;
class Validations extends JFrame{
JLabel l1,l2,l3,l;
JLabel lab1,lab2,lab3;
JTextField t1,t2,t3;
JPanel p;

Validations(){
l1=new JLabel("Enter Date: (MM/dd/yyyy)");
t1=new JTextField(20);
l2=new JLabel("Enter Phone Number: ");
t2=new JTextField(20);
l3=new JLabel("Enter Email: ");
t3=new JTextField(20);

lab1=new JLabel();
lab2=new JLabel();
lab3=new JLabel();
p=new JPanel(new GridLayout(3,3));
p.add(l1);
p.add(t1);
p.add(lab1);
p.add(l2);
p.add(t2);
p.add(lab2);
p.add(l3);
p.add(t3);
p.add(lab3);
add(p);
setVisible(true);
pack();
lab1.setVisible(false);
lab2.setVisible(false);
lab3.setVisible(false);
t1.addKeyListener(new KeyAdapter() {
public void keyTyped(KeyEvent e) {
String date=t1.getText();
try{
DateFormat df = DateFormat.getDateInstance(DateFormat.SHORT);
df.setLenient(false);
Date dt2 = df.parse(date);
lab1.setVisible(false);
}
catch(Exception ex){
lab1.setText("* Invalid Date");
lab1.setVisible(true);
lab1.setForeground(Color.red);
}
}
});

t2.addKeyListener(new KeyAdapter() {
public void keyTyped(KeyEvent e) {
String input = t2.getText();
Pattern p = Pattern.compile("[A-Z,a-z,&%$@!()*^]");
Matcher m = p.matcher(input);
if (m.find()) {
lab2.setText("* Enter only Numeric Value");
lab2.setVisible(true);
lab2.setForeground(Color.red);
}
else{
lab2.setVisible(false);
}
}
});

t3.addKeyListener(new KeyAdapter() {
public void keyTyped(KeyEvent e) {
String email=t3.getText();
String exp="^[\\w\\-]([\\.\\w])+[\\w]+@([\\w\\-]+\\.)+[A-Z]{2,4}$";
CharSequence seq = email;
Pattern pattern = Pattern.compile(exp,Pattern.CASE_INSENSITIVE);
Matcher m = pattern.matcher(seq);
if (m.matches()) {
lab3.setVisible(false);
}
else {
lab3.setText("* Invalid Email ID");
lab3.setVisible(true);
lab3.setForeground(Color.red);
}
}
});
}
public static void main(String[]args){
Validations v=new Validations();
}
}

Thanks