//import packages
import java.awt.*;
import java.awt.event.*;
import java.awt.datatransfer.*;
import java.text.DecimalFormat;
import javax.swing.JOptionPane;
 
//create a subclass at the fram class
public class RectangleApp extends Frame implements ActionListener
{
	//construct variables
	private Label lengthLabel = new Label("Enter the length: ", Label.RIGHT);
	private Label widthLabel = new Label("Enter the width: ", Label.RIGHT);
	private Label areaLabel = new Label("Area: ", Label.RIGHT);
	private Label perimeterLabel = new Label("Perimeter: ", Label.RIGHT);
	private Panel topPanel;
	private Button calculateButton;
	private Button exitButton;
	private TextField lengthField = new TextField(10);
	private TextField widthField = new TextField(10);
	private TextField areaField = new TextField(10);
	private TextField perimeterField = new TextField(10);
 
	//constructor method
	public RectangleApp()
	{
		//create an instance of the menu
		MenuBar mnuBar = new MenuBar();
		setMenuBar(mnuBar); //display the previously constructed MenuBar
 
		//construct and populate File Menu
		Menu mnuFile = new Menu("File"); //create a command on the MenuBar
		mnuBar.add(mnuFile);
		MenuItem mnuFileExit = new MenuItem("Exit");
 
		//construct a command to go under a menu
		mnuFile.add(mnuFileExit);
 
		//construct and populate the edit menu
		Menu mnuEdit = new Menu("Edit");
		mnuBar.add(mnuEdit);
		MenuItem mnuEditClear = new MenuItem("Clear");
		mnuEdit.add(mnuEditClear);
 
		//register the action listener with each of the menuitems
		mnuFileExit.addActionListener(this);
		mnuEditClear.addActionListener(this);
 
		//assign an ActionCommand to each of the MenuItems
		mnuFileExit.setActionCommand("Exit");
		mnuEditClear.setActionCommand("Clear");
 
		//set layouts for the Frame and Panels
		setLayout(new BorderLayout());
		topPanel.setLayout(new GridLayout(5, 2, 5, 5));
 
 
		//allow the x to close the application
		addWindowListener(new WindowAdapter()
		{
			public void windowClosing(WindowEvent e)
			{
				System.exit(0);
			}
		} //end window adapter
		);
	} //end calculator[] constructor method
		public static void main(String args [])
		{
			//construct an instance of the Frame (Calculator)
			RectangleApp f = new RectangleApp();
			f.setTitle("Area and Perimeter of a Rectangle");
			f.setSize(350, 200);
			f.setLocationRelativeTo(null);
			f.setVisible(true);
		} //end main
		public void actionPerformed(ActionEvent e)
		{
 
 
 
		} //and action performed
	} //end class

f.setLocationRelativeTo(null);

f.setAlwaysOnTop(true)

//import packages
import java.awt.*;
import java.awt.event.*;
import java.awt.datatransfer.*;
import java.text.DecimalFormat;
import javax.swing.JOptionPane;
 
//create a subclass at the fram class
public class RectangleApp extends Frame implements ActionListener
{
	//construct variables
	private Label lengthLabel = new Label("Enter the length: ", Label.RIGHT);
	private Label widthLabel = new Label("Enter the width: ", Label.RIGHT);
	private Label areaLabel = new Label("Area: ", Label.RIGHT);
	private Label perimeterLabel = new Label("Perimeter: ", Label.RIGHT);
	private Panel topPanel;
	private Button calculateButton = new Button("Calculate");
	private Button exitButton = new Button("Exit the Program");
	private TextField lengthField = new TextField(10);
	private TextField widthField = new TextField(10);
	private TextField areaField = new TextField(10);
	private TextField perimeterField = new TextField(10);
	private boolean first;
	private boolean clearText;
	private DecimalFormat calcPattern;
	private double length;
	private double width;
	private double area;
	private double perimeter;
 
	//constructor method
	public RectangleApp()
	{
		//create an instance of the menu
		MenuBar mnuBar = new MenuBar();
		setMenuBar(mnuBar); //display the previously constructed MenuBar
 
		//construct and populate File Menu
		Menu mnuFile = new Menu("File"); //create a command on the MenuBar
		mnuBar.add(mnuFile);
		MenuItem mnuFileExit = new MenuItem("Exit");
 
		//construct a command to go under a menu
		mnuFile.add(mnuFileExit);
 
		//construct and populate the edit menu
		Menu mnuEdit = new Menu("Edit");
		mnuBar.add(mnuEdit);
		MenuItem mnuEditClear = new MenuItem("Clear");
		mnuEdit.add(mnuEditClear);
 
		//register the action listener with each of the menuitems
		mnuFileExit.addActionListener(this);
		mnuEditClear.addActionListener(this);
 
		//assign an ActionCommand to each of the MenuItems
		mnuFileExit.setActionCommand("Exit");
		mnuEditClear.setActionCommand("Clear");
 
		//construct components and initialize beginning values
		topPanel = new Panel();
		calcPattern = new DecimalFormat("###,###.##");
		topPanel.add(lengthLabel);
		topPanel.add(lengthField);
		length = 0.0;
		topPanel.add(widthLabel);
		topPanel.add(widthField);
		width = 0.0;
		topPanel.add(areaLabel);
		topPanel.add(areaField);
		area = 0.0;
		areaField.setEditable(false);
		topPanel.add(perimeterLabel);
		topPanel.add(perimeterField);
		perimeter = 0.0;
		perimeterField.setEditable(false);
		topPanel.add(calculateButton);
		topPanel.add(exitButton);
 
		//set layouts for the Frame and Panels
		setLayout(new BorderLayout());
		topPanel.setLayout(new GridLayout(5, 2, 5, 5));
 
		//add components to frame
		add(topPanel, BorderLayout.NORTH);
 
 
		//allow the x to close the application
		addWindowListener(new WindowAdapter()
		{
			public void windowClosing(WindowEvent e)
			{
				System.exit(0);
			}
		} //end window adapter
		);
	} //end calculator[] constructor method
		public static void main(String args [])
		{
			//construct an instance of the Frame (Calculator)
			RectangleApp f = new RectangleApp();
			f.setTitle("Area and Perimeter of a Rectangle");
			f.setSize(350, 200);
			f.setLocationRelativeTo(null);
			f.setVisible(true);
		} //end main
		public void actionPerformed(ActionEvent e)
		{
			//test for menu item clicks
			String arg = e.getActionCommand();
 
		//exit was clicked
		if(arg == "Exit");
		System.exit(0);
 
		//clear was clikced
		if(arg.equals("Clear"))
		{
			clearText = true;
			first = true;
 
		} //end if about
 
		//Calculate button was clicked
		{
			if(arg.equals("Calculate"))
 
			convert data in TextField to int
			double length = Double.parseDouble(lengthField.getText());
			double width = Double.parseDouble(widthField.getText());
			double area = Double.parseDouble(areaField.getText());
			double perimeter = Double.parseDouble(perimeterField.getText());
			area = length * width;
			perimeter = length + width;
		} //end the if go
 
		//exitbutton was clicked
		if(arg.equals("Exit the program"))
		{
			System.exit(0);
		} //end the if exit
 
	} //end action performed
} //end class