How To Calculate Area

[User 10694570]

Can anyone aide me if figuring out how to code for calculating area? I know that I need to the length and width the input, convert them to the proper datatype, do the calculations, and display them. I just can't figure out HOW.

import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTabbedPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SwingConstants;

public class Flooring extends JFrame implements ActionListener{
JRadioButton radioWood, radioCarpet, radioGroup;
JLabel labelName, labelAddress, labelLength, labelWidth;
JTextField textName, textAddress, textLength, textWidth, textCalculateArea;
JButton buttonCalculateArea, buttonCalculateCost, buttonSubmitOrder, buttonDisplaySummary, buttonDisplayList;
int area;

public Flooring() {

	super("Flooring");
		 
	JTabbedPane tabbedPane = new JTabbedPane();
	
	//Create Customer Panel & Add To JTabbedPane
	JPanel panel1 = new JPanel(new GridLayout(5, 2, 4, 9));
	
	labelName = new JLabel("Name: ", SwingConstants.CENTER);
	panel1.add(labelName);
	textName = new JTextField(10);
	panel1.add(textName);
	
	labelAddress = new JLabel("Address: ", SwingConstants.CENTER);
	panel1.add(labelAddress);
	textAddress = new JTextField(50);
	panel1.add(textAddress);

	tabbedPane.addTab("Customer", null, panel1, "First Panel");
	
	//Create Size Panel & Add To JTabbedPane
	JPanel panel2 = new JPanel(new GridLayout(5, 2, 4, 9));
	
	radioWood = new JRadioButton("Wood");
	radioWood.setBounds(336, 157, 64, 23);
	radioWood.setSelected(false);
	panel2.add(radioWood);
	
	radioCarpet = new JRadioButton("Carpet");
	radioCarpet.setBounds(336, 157, 64, 23);
	radioCarpet.setSelected(false);
	panel2.add(radioCarpet);
	
	labelLength = new JLabel("Flooring Length: ", SwingConstants.CENTER);
	panel2.add(labelLength);
	textLength = new JTextField(10);
	panel2.add(textLength);
	
	labelWidth = new JLabel("Flooring Width: ", SwingConstants.CENTER);
	panel2.add(labelWidth);
	textWidth = new JTextField(10);
	panel2.add(textWidth);
	
	buttonCalculateArea = new JButton("Calculate Area");
	panel2.add(buttonCalculateArea);
	buttonCalculateArea.addActionListener(this);