import java.awt.*;import java.applet.*;import java.awt.event.*;public class BookApplet extends Applet implements ActionListener{ //Declare panels Panel myInputPanel = new Panel(); Panel myButtonPanel = new Panel(); Panel myHeaderPanel = new Panel(); Panel myResultPanel = new Panel(); Color myColor = new Color(80,175,130); Font myFont = new Font("Arial",1,18); //declare all button and labels private TextField myTextField1 = new TextField(15); private TextField myTextField2 = new TextField(15); private TextField myTextField3 = new TextField(15); private TextField myTextField4 = new TextField(15); private Button myButton1 = new Button("Enter Book"); private Button myButton2= new Button("Clear Screen"); private Button myButton3= new Button("Average Book price"); private Label myLabel1 = new Label("Enter book ID",1); private Label myLabel2 = new Label("Enter book name",1); private Label myLabel3 = new Label("Enter number of books",1); private Label myLabel4 = new Label("Enter price of the book",1); private Label myResult1 = new Label("",1); private Label myResult2 = new Label("",1); private Label myHeader = new Label("Welcome to myBook Screen",1); private Book myBook; private BookList myBookList = new BookList(3); public BookApplet() //Add the action listener to the button and labels { myHeaderPanel.add(myHeader); myInputPanel.setLayout (new GridLayout(4,2)); myResultPanel.setLayout (new GridLayout(2,2)); myHeader.setFont(myFont); myHeaderPanel.setForeground(myColor); myInputPanel.add(myLabel1); myInputPanel.add(myTextField1); myInputPanel.add(myLabel2); myInputPanel.add(myTextField2); myInputPanel.add(myLabel3); myInputPanel.add(myTextField3); myInputPanel.add(myLabel4); myInputPanel.add(myTextField4); myButtonPanel.add(myButton1); myButtonPanel.add(myButton2); myButtonPanel.add(myButton3); myResultPanel.add(myResult1); myResultPanel.add(myResult2); this.myButton1.addActionListener(this); this.myButton2.addActionListener(this); this.myButton3.addActionListener(this); myButton1.addActionListener(this); myButton2.addActionListener(this); myButton3.addActionListener(this); add(myHeaderPanel); add(myInputPanel); add(myButtonPanel); add(myResultPanel); } public void loadBook() { myBook = new Book(myTextField1.getText(),myTextField2.getText()); myBook.enterdetails(myTextField3.getText(),myTextField4.getText()); if(myBookList.add(myBook)) { myResult1.setText("The Book has been Loaded"); } else { myResult1.setText("There's no more space in the array"); } } public void clearScreen() { myTextField1.setText(""); myTextField2.setText(""); myTextField3.setText(""); myTextField4.setText(""); } public void actionPerformed(ActionEvent e) { String myAverage; if(e.getSource()==myButton1) { loadBook(); clearScreen(); } if(e.getSource()==myButton3) { if (myStudent!=null) { myAverage = "Student Average is: " + myStudent.calculateAverage(); myResult1.setText(myAverage); } else { myResult1.setText("No Student has been loaded"); } } if(e.getSource()==allAveragesButton) { myResult2.setText("The average for all the books is" + myBookList.BookListAverage()); } } } {}