Subject - AJP [22517]
Practical No. 12: Write A Program To Demonstrate The Use Of Jtextfield And Jpasswordfield Using
Listener Interface..
Performed By – Pranav Jawadwar
CO5I – 11
_________________________________________________________________________________________________________________________________
X - PROGRAM CODE
Q ------------------------
------------------------------------------- PROGRAM CODE -----------------------------------------------------------
import javax.swing.*;
import java.awt.*;
public class P12XCode extends JPasswordField
public P12XCode(int columns)
super(columns);
@Override
public char getEchoChar()
return '#';
public static void main(String[] args)
JFrame f = new JFrame("To Set The Password Character As '#' instead of '*' ");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setLayout(new FlowLayout());
P12XCode pf = new P12XCode(20);
pf.setEchoChar('#');
JButton PB = new JButton("Show Password");
PB.addActionListener(e ->
{
Subject - AJP [22517]
Practical No. 12: Write A Program To Demonstrate The Use Of Jtextfield And Jpasswordfield Using
Listener Interface..
Performed By – Pranav Jawadwar
CO5I – 11
_________________________________________________________________________________________________________________________________
char echoChar = pf.getEchoChar();
if (echoChar == 0)
pf.setEchoChar('#');
else
pf.setEchoChar((char) 0);
});
JButton B1 = new JButton("Hide Password");
B1.addActionListener(e ->
char echoChar = pf.getEchoChar();
if (echoChar == -1)
pf.setEchoChar((char) 0);
else
pf.setEchoChar('#');
});
f.add(pf);
f.add(PB);
f.add(B1);
Subject - AJP [22517]
Practical No. 12: Write A Program To Demonstrate The Use Of Jtextfield And Jpasswordfield Using
Listener Interface..
Performed By – Pranav Jawadwar
CO5I – 11
_________________________________________________________________________________________________________________________________
f.pack();
f.setVisible(true);
f.setSize(500, 200);
-------------------------------------------- PROGRAM OUTPUT --------------------------------------------------
Subject - AJP [22517]
Practical No. 12: Write A Program To Demonstrate The Use Of Jtextfield And Jpasswordfield Using
Listener Interface..
Performed By – Pranav Jawadwar
CO5I – 11
_________________________________________________________________________________________________________________________________
XIII. Exercise
Q1 ------------------------
------------------------------------------- PROGRAM CODE -----------------------------------------------------------
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class P12ExQ1
private static final String VALID_USERNAME = "Atharva Bodhankar";
private static final String VALID_PASSWORD = "mustang1969";
public static void main(String[] args)
JFrame f = new JFrame("User Authentication Demo");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setLayout(new BorderLayout());
JPanel logP = new JPanel(new GridLayout(3, 2, 20, 20));
JLabel UL = new JLabel("User-name:");
JLabel pL = new JLabel("Password:");
JTextField userfi = new JTextField();
JPasswordField pf = new JPasswordField();
JButton logb = new JButton("Log in");
logb.addActionListener(new ActionListener()
@Override
Subject - AJP [22517]
Practical No. 12: Write A Program To Demonstrate The Use Of Jtextfield And Jpasswordfield Using
Listener Interface..
Performed By – Pranav Jawadwar
CO5I – 11
_________________________________________________________________________________________________________________________________
public void actionPerformed(ActionEvent e)
String username = userfi.getText();
char[] pchar = pf.getPassword();
String password = new String(pchar);
if (isValidUser(username, password))
JOptionPane.showMessageDialog(f, "Login Successful!");
else
JOptionPane.showMessageDialog(f, "Invalid Username or Password", "Error",
JOptionPane.ERROR_MESSAGE);
pf.setText("");
});
logP.add(UL);
logP.add(userfi);
logP.add(pL);
logP.add(pf);
logP.add(logb);
f.add(logP, BorderLayout.CENTER);
f.setSize(300, 200);
f.setLocationRelativeTo(null);
f.setVisible(true);
Subject - AJP [22517]
Practical No. 12: Write A Program To Demonstrate The Use Of Jtextfield And Jpasswordfield Using
Listener Interface..
Performed By – Pranav Jawadwar
CO5I – 11
_________________________________________________________________________________________________________________________________
private static boolean isValidUser(String username, String password)
return username.equals(VALID_USERNAME) &&
password.equals(VALID_PASSWORD);
-------------------------------------------- PROGRAM OUTPUT --------------------------------------------------
Subject - AJP [22517]
Practical No. 12: Write A Program To Demonstrate The Use Of Jtextfield And Jpasswordfield Using
Listener Interface..
Performed By – Pranav Jawadwar
CO5I – 11
_________________________________________________________________________________________________________________________________
Subject - AJP [22517]
Practical No. 12: Write A Program To Demonstrate The Use Of Jtextfield And Jpasswordfield Using
Listener Interface..
Performed By – Pranav Jawadwar
CO5I – 11
_________________________________________________________________________________________________________________________________
Q2 ------------------------
------------------------------------------- PROGRAM CODE -----------------------------------------------------------
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class P12ExQ2
public static void main(String[] args)
JFrame f = new JFrame("To Perform The Addition Of Two Numbers");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setLayout(new BorderLayout());
JPanel P1 = new JPanel(new GridLayout(2, 2, 10, 10));
JTextField f1 = new JTextField();
JTextField f2 = new JTextField();
JButton b1 = new JButton("Add The Numbers ");
JTextField f3 = new JTextField();
b1.addActionListener(new ActionListener()
@Override
public void actionPerformed(ActionEvent e)
try
{
Subject - AJP [22517]
Practical No. 12: Write A Program To Demonstrate The Use Of Jtextfield And Jpasswordfield Using
Listener Interface..
Performed By – Pranav Jawadwar
CO5I – 11
_________________________________________________________________________________________________________________________________
double num1 = Double.parseDouble(f1.getText());
double num2 = Double.parseDouble(f2.getText());
double num3 = num1 + num2;
f3.setText(Double.toString(num3));
catch (NumberFormatException ex)
f3.setText("Invalid input");
});
P1.add(new JLabel("1st Number : "));
P1.add(f1);
P1.add(new JLabel("2nd Number : "));
P1.add(f2);
f.add(P1, BorderLayout.NORTH);
f.add(b1, BorderLayout.EAST);
f.add(f3, BorderLayout.SOUTH);
f3.setEditable(false);
f.setSize(400, 150);
f.setLocationRelativeTo(null);
f.setVisible(true);
-------------------------------------------- PROGRAM OUTPUT --------------------------------------------------
Subject - AJP [22517]
Practical No. 12: Write A Program To Demonstrate The Use Of Jtextfield And Jpasswordfield Using
Listener Interface..
Performed By – Pranav Jawadwar
CO5I – 11
_________________________________________________________________________________________________________________________________
Subject - AJP [22517]
Practical No. 12: Write A Program To Demonstrate The Use Of Jtextfield And Jpasswordfield Using
Listener Interface..
Performed By – Pranav Jawadwar
CO5I – 11
_________________________________________________________________________________________________________________________________
Q3 ------------------------
------------------------------------------- PROGRAM CODE -----------------------------------------------------------
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class P12ExQ3
public static void main(String[] args)
JFrame f = new JFrame("To Accept Password From User With Six Charecters");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setLayout(new BorderLayout());
JPanel pan = new JPanel(new FlowLayout());
JPasswordField pf = new JPasswordField(20);
JButton sb = new JButton("Submit");
sb.addActionListener(new ActionListener()
@Override
public void actionPerformed(ActionEvent e)
{
Subject - AJP [22517]
Practical No. 12: Write A Program To Demonstrate The Use Of Jtextfield And Jpasswordfield Using
Listener Interface..
Performed By – Pranav Jawadwar
CO5I – 11
_________________________________________________________________________________________________________________________________
char[] pc = pf.getPassword();
String password = new String(pc);
if (password.length() < 6)
JOptionPane.showMessageDialog(f, "Ivalid Password - Please Enter Six or More
Charecters", "Error",
JOptionPane.ERROR_MESSAGE);
else
JOptionPane.showMessageDialog(f, " Valid Password !");
pf.setText("");
});
pan.add(new JLabel("Enter Password:"));
pan.add(pf);
pan.add(sb);
f.add(pan, BorderLayout.CENTER);
f.setSize(300, 150);
f.setLocationRelativeTo(null);
f.setVisible(true);
f.setSize(300, 200);
}
Subject - AJP [22517]
Practical No. 12: Write A Program To Demonstrate The Use Of Jtextfield And Jpasswordfield Using
Listener Interface..
Performed By – Pranav Jawadwar
CO5I – 11
_________________________________________________________________________________________________________________________________
-------------------------------------------- PROGRAM OUTPUT --------------------------------------------------
Subject - AJP [22517]
Practical No. 12: Write A Program To Demonstrate The Use Of Jtextfield And Jpasswordfield Using
Listener Interface..
Performed By – Pranav Jawadwar
CO5I – 11
_________________________________________________________________________________________________________________________________
