import java.util.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.*;
import java.io.*;
public class AoT {
    
    JFrame frame = new JFrame("Area Of Triangle");
    JPanel up = new JPanel();
    JPanel center = new JPanel();
    JPanel right = new JPanel();
    JPanel left = new JPanel();
    JPanel down = new JPanel();
    JLabel inturs = new JLabel("Enter your sides a, b, & c");
    JLabel area = new JLabel("Area = ");
    JLabel answer = new JLabel();
    JButton solve = new JButton("Solve");
    JLabel side1 = new JLabel("Side a");
    JLabel side2 = new JLabel("Side b");
    JLabel side3 = new JLabel("Side c");
    JTextField sidea = new JTextField(5);
    JTextField sideb = new JTextField(5);
    JTextField sidec = new JTextField(5);

    
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        new AoT().buildGUI();
    }
    public void buildGUI() {
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        ///add panels to the frame.
        frame.getContentPane().add(BorderLayout.NORTH, up);
        frame.getContentPane().add(BorderLayout.CENTER, center);
        frame.getContentPane().add(BorderLayout.SOUTH, down);
        frame.getContentPane().add(BorderLayout.EAST, right);
        frame.getContentPane().add(BorderLayout.WEST, left);


        //add stuff to panels
        up.add(inturs);
        center.add(sidea);
        center.add(sideb);
        center.add(sidec);
        left.add(side1);
        left.add(side2);
        left.add(side3);
        left.add(area);
        right.add(solve);
        down.add(answer);
        //add listener
        solve.addActionListener(new MySolveListener());
        
        //set vis
        frame.setSize(500,500);
        frame.setVisible(true);
    }
    public class MyDownTempoListener implements ActionListener {
        public void actionPerformed(ActionEvent a) {
        int a = Integer.parseInt(sidea.getText());
        int b = Integer.parseInt(sideb.getText());
        int c = Integer.parseInt(sidec.getText());
        int s = .5 * (a+b+c);
        int N = s * ((s-a) * (s-b) * (s-c));
        int A = Math.sqrt(N);
        String Area = Integer.toString(A);
        answer.setText(A);

        }
    }
        
    

}

javac AoT.java;
java AoT;