Error on compling the Swing program

Question

Hi all,
I am trying to run a Login Swing program. I am want to go to the next page on click of the LOGIN button.Here is my code:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class login extends JFrame implements ActionListener {
     public login(){
          setTitle("Login Page");
          //setSize(500,500);
          setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          setVisible(true);
          Container pane = getContentPane();
          FlowLayout layout = new FlowLayout();
          pane.setLayout(layout);
          JLabel loginId = new JLabel("LoginId : ", JLabel.CENTER);
          JTextField Id = new JTextField(20);
          if(Id.equals("shri"))
               System.out.println("login successful");
          JLabel password = new JLabel("Password : ", JLabel.CENTER);
          TextField pwd = new TextField(20);
          pwd.setEchoChar('*');
          JButton Enter = new JButton("Log in");
          private void actionPerformed(ActionEvent e)) {
               String read = Id.getText();
               String in = new String(pwd.getText());
               //validate login and password here. validity will be done by sending login/password to the server
               if (read.equals("Shri") && in.equals("Shri")) {
               System.out.println("login successfull");
               } else {
               JOptionPane.showMessageDialog(this,"Incorrect login or password","Error",JOptionPane.ERROR_MESSAGE);
               Id.setText("");
               pwd.setText("");
               Id.requestFocusInWindow();
          pane.add(loginId);
          pane.add(Id);
          pane.add(password);
          pane.add(pwd);
          pane.add(Enter,BorderLayout.CENTER);
          setContentPane(pane);
          pack();
     public static void main(String[] args) {
          login enter = new login();
I'm getting the error->The type login must implement the inherited abstract method ActionListener.actionPerformed(ActionEvent)
     void is an invalid type for the variable actionPerformed
     Syntax error on token "(", ; expected
     Syntax error, insert ";" to complete LocalVariableDeclarationStatement
Please help me resolve this error and also to improvise the code.

Answer 1

You code had basic problem like declaration errors. Have modified your code.
Try this.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Login extends JFrame implements ActionListener {
    JLabel loginId;
    JTextField Id;
    TextField pwd;
    public Login(){
        setTitle("Login Page");
        //setSize(500,500);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
        Container pane = getContentPane();
        FlowLayout layout = new FlowLayout();
        pane.setLayout(layout);
        loginId = new JLabel("LoginId : ", JLabel.CENTER);
        Id = new JTextField(20);
        if(Id.equals("shri")) {
            System.out.println("login successful");
        JLabel password = new JLabel("Password : ", JLabel.CENTER);
        pwd = new TextField(20);
        pwd.setEchoChar('*');
        JButton Enter = new JButton("Log in");
        pane.add(loginId);
        pane.add(Id);
        pane.add(password);
        pane.add(pwd);
        pane.add(Enter,BorderLayout.CENTER);
        setContentPane(pane);
        pack();
    public void actionPerformed(ActionEvent e) {
        String read = Id.getText();
        String in = new String(pwd.getText());
        //validate login and password here. validity will be done by sending login/password to the server
        if (read.equals("Shri") && in.equals("Shri")) {
            System.out.println("login successfull");
        } else {
            JOptionPane.showMessageDialog(this,"Incorrect login or password","Error",JOptionPane.ERROR_MESSAGE);
            Id.setText("");
            pwd.setText("");
            Id.requestFocusInWindow();
    public static void main(String[] args) {
        Login enter = new Login();
}