import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class Absolute extends JFrame implements ActionListener //Error: Absolute is not abstract method actionPerformed(java.awt.event.ActionEvent) in java.awt.event.ActionListener
{
public JTextField textField1,textField2,textField3;
public JLabel label1;
String Operatn[] = {"Add","Mult","Divide","Sub"};
//Constructor
public Absolute()
{
JFrame frame = new JFrame();
frame.setLayout(null);
JLabel label1 = new JLabel ("First Number:");
label1.setBounds(20,25,100,20);
label1.setForeground(Color.BLUE);
JLabel label2 = new JLabel ("Second Number:");
label2.setBounds(20,65,100,20);
label2.setForeground(Color.BLUE);
JLabel label3 = new JLabel ("Operator");
label3.setBounds(20,105,100,20);
label3.setForeground(Color.RED);
JComboBox compBox = new JComboBox(Operatn);
compBox.setBounds(124,105,100,20);
JLabel label4 = new JLabel ("TOTAL :");
label4.setBounds(20,200,100,20);
label4.setForeground(Color.BLACK);
JTextField textField1 = new JTextField();
textField1.setBounds(124,25,100,20);
textField1.setBackground(Color.YELLOW);
JTextField textField2 = new JTextField();
textField2.setBounds(124,65,100,20);
textField2.setBackground(Color.YELLOW);
JTextField textField3 = new JTextField();
textField3.setBounds(124,200,100,20);
textField3.setBackground(Color.YELLOW);
JButton ok = new JButton("Calculate");
ok.addActionListener(this);
ok.setBounds(50, 150, 90, 25);
JButton close = new JButton ("Close");
close.setBounds(150, 150, 80, 25);
frame.add(ok);
frame.add(close);
frame.add(label1);
frame.add(label2);
frame.add(label3);
frame.add(compBox);
frame.add(label4);
frame.add(textField1);
frame.add(textField2);
frame.add(textField3);
frame.setSize(400, 350);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
public void ActionPerformed(ActionEvent e)
{
try
{
String num1 = textField1.getText();
String num2 = textField2.getText();
int number1 = Integer.parseInt(num1);
int number2 = Integer.parseInt(num2);
int Total = number1 + number2;
String dispTotal = Integer.toString(Total);
}
catch(Exception exp)
{
textField3.setText("Error");
}
}
}this is the main method
import javax.swing.JFrame;
import java.awt.*;
public class main_method
{
public static void main(String[] args)
{
JFrame frame = new JFrame();
frame.add(new Absolute());
}
}