Login Form in Swing
This section illustrates you how to create a Login form.
To create a Login Form, we have used two class files:
1) NextPage.java
2) LoginDemo.java
In the LoginDemo.java, we have create two text fields text1 and text2 to set
the text for username and password. A button is created to perform an action.
The method text1.getText() get the text of username and the method
text2.getText()
get the text of password which the user enters. Then we have create a condition
that if the value of text1 and text2 is roseindia, the user will enter into the next page
on clicking the submit button. The NextPage.java is
created to move the user to the next page. In case if the user enters the
invalid username and password , the class JOptionPane provides the
MessageDialog to shows the error message.
Here is the code of NextPage.java
import javax.swing.*;
import java.awt.*;
class NextPage extends JFrame
{
NextPage()
{
setDefaultCloseOperation(javax.swing.
WindowConstants.DISPOSE_ON_CLOSE);
setTitle("Welcome");
setSize(400, 200);
}
}
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Here is the code of LoginDemo.java
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class Login extends JFrame implements ActionListener
{
JButton SUBMIT;
JPanel panel;
JLabel label1,label2;
final JTextField text1,text2;
Login()
{
label1 = new JLabel();
label1.setText("Username:");
text1 = new JTextField(15);
label2 = new JLabel();
label2.setText("Password:");
text2 = new JPasswordField(15);
SUBMIT=new JButton("SUBMIT");
panel=new JPanel(new GridLayout(3,1));
panel.add(label1);
panel.add(text1);
panel.add(label2);
panel.add(text2);
panel.add(SUBMIT);
add(panel,BorderLayout.CENTER);
SUBMIT.addActionListener(this);
setTitle("LOGIN FORM");
}
public void actionPerformed(ActionEvent ae)
{
String value1=text1.getText();
String value2=text2.getText();
if (value1.equals("roseindia") && value2.equals("roseindia")) {
NextPage page=new NextPage();
page.setVisible(true);
JLabel label = new JLabel("Welcome:"+value1);
page.getContentPane().add(label);
}
else{
System.out.println("enter the valid username and password");
JOptionPane.showMessageDialog(this,"Incorrect login or password",
"Error",JOptionPane.ERROR_MESSAGE);
}
}
}
class LoginDemo
{
public static void main(String arg[])
{
try
{
Login frame=new Login();
frame.setSize(300,100);
frame.setVisible(true);
}
catch(Exception e)
{JOptionPane.showMessageDialog(null, e.getMessage());}
}
}
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Output will be displayed as:
Download Source Code
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