Problem with frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOS E)

[jim01]

When transcribing this code I receive the following error message: "The method setDefaultCloseOperation(int) is undefined for the type LoanCalculator" I do not understand why I am receiving this message or how to get rid of it. The error is on line 80.

Here is the code:

import java.awt.*;
import java.awt.event.*;  
import javax.swing.*;
import javax.swing.border.TitledBorder;

//create LoanCalcualtor class that extends the JFrame class, thus making 
//the LoanCalclator class a subclass of JFrame.
public class LoanCalculator extends Frame {
	//Create text fields for interest rate
	//year, loan amount, monthly payment, and total payment
	private JTextField jtfAnnualInterestRate = new JTextField();
	private JTextField jtfNumberOfYears = new JTextField();
	private JTextField jtfLoanAmount = new JTextField();
	private JTextField jtfMonthlyPayment = new JTextField();
	private JTextField jtfTotalPayment = new JTextField();
	
	//create a compute payment button
	private JButton jbtComputeLoan = new JButton("Compute Payment");
	
	//construct LoanCalculator() constructor
	public LoanCalculator() {
		//create p1 JPanel object to hold labels and text fields
		JPanel p1 = new JPanel(new GridLayout(5, 2));
		//add labels and text fields to p1 panel
		p1.add(new JLabel("Annual Interest Rate"));
		p1.add(jtfAnnualInterestRate);
		p1.add(new JLabel("Number of Years"));
		p1.add(jtfNumberOfYears);
		p1.add(new JLabel("Loan Amount"));
		p1.add(jtfLoanAmount);
		p1.add(new JLabel("Monthly Payment"));
		p1.add(jtfMonthlyPayment);
		p1.add(new JLabel("Total Payment"));
		p1.add(jtfTotalPayment);
		p1.setBorder(new
				TitledBorder("Enter loan amount, interest rate, and year"));
		
		//create p2 JPanel object to hold button
		JPanel p2 = new JPanel(new FlowLayout(FlowLayout.RIGHT));
		//add button to p2 panel
		p2.add(jbtComputeLoan);
		
		//add panels to the frame
		add(p1, BorderLayout.CENTER);
		add(p2, BorderLayout.SOUTH);
		
		//register listener for button
		jbtComputeLoan.addActionListener(new ButtonListener());
	}
	
	//create ButtonListener class to handle the compute payment button
	public class ButtonListener implements ActionListener {
		//create actionPerformed() method
		public void actionPerformed(ActionEvent e) {
			//Get the values from the text fields
			double interest =
					Double.parseDouble(jtfAnnualInterestRate.getText());
			int year = 
					Integer.parseInt(jtfNumberOfYears.getText());
			double loanAmount = 
					Double.parseDouble(jtfLoanAmount.getText());
			
			//create a new loan object
			Loan loan = new Loan(interest, year, loanAmount);
			
			//display monthly payment and total payment
			jtfMonthlyPayment.setText(String.format("%.2f",
					loan.getMonthlyPayment()));
			jtfTotalPayment.setText(String.format("%.2f",
					loan.getTotalPayment()));	
		}
	}
	
	public static void main(String [] args) {
		//create new frame object
		LoanCalculator frame = new LoanCalculator();
		frame.pack();
		frame.setTitle("Loan Calculator");
		frame.setLocationRelativeTo(null);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setVisible(true);	
	}
}

[Junky]

Since LoanCalculator extends Frame, I want you to go to the Java API, look up the Frame class and show me where the setDefaultCloseOperation method is.

[jim01]

That should have been JFrame, not Frame. I must have fat-fingered the J key. Thank you for your help.