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8.1

Learning Java for the 1st time (cont.2)

Asked by -CyberIT- in Java Programming Language, New to Java Programming

Tags: Java, New to Java

Im trying to continue to learn Java. Im making a mortgage calculator but with a GUI interface. I have put all the text boxes in with some coding to do the math portion of it but when I input all the information nothing adds up for me. I want it to calculate and display the mortgage payment amount from the amount of the mortgage, the term of the mortgage, and the interest rate of the mortgage. I would also like to clear the data and add different information into it then being able to quit it when done.

Im stuck! Any help would be great!

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             import java.text.*;
import java.io.*;
import java.awt.event.*;
import javax.swing.*;
 
 
public class MortgCalc extends JFrame implements ActionListener
{
 
	private JPanel panelAdder;
	private JLabel labelA, labelB, labelC, labelD;
	private JTextField textFieldLAmount, textFieldLTerm;
    private JTextField textFieldIntRate, textFieldMoPayment;
    private JTextArea textFieldPayment;
	private JButton resetCalc;
 
	//Declare Array's for calculation
   	double intRate;
   	double termInMonths;
    double loanAmount;
    double loanAmt = loanAmount;
	double monthlyInterest;
    double monthlyPayment;
    double monthlyPrinciple;
    double Balance;
    int count;
 
public static void main (String[] args)
    {
        new MortgCalc().setVisible(true);
    }
 
public MortgCalc()
{
	super("Mortgage Calculator");
 
	//Initialize Components
 	panelAdder = new JPanel();
 
 	labelA = new JLabel("Loan Amount $");
 	textFieldLAmount = new JTextField();
 
 	labelB = new JLabel("Term in Years");
 	textFieldLTerm = new JTextField();
 
 	labelC = new JLabel("Interest Rate");
 	textFieldIntRate = new JTextField();
 
	labelD = new JLabel("Monthly Payment");
	textFieldMoPayment = new JTextField();
	textFieldPayment = new JTextArea();
	resetCalc = new JButton("Reset");
 
	// Add Listener for calculate and reset button
	resetCalc.addActionListener(this);
 
	JScrollPane scrollPane = new JScrollPane (textFieldPayment, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
	JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
 
 	//Set Object Attributes
 	textFieldPayment.setEditable(false);
 	textFieldPayment.setColumns (200);
 	textFieldLAmount.setColumns(10);
 	textFieldLTerm.setColumns(2);
    textFieldIntRate.setColumns(3);
    textFieldMoPayment.setColumns(10);
 
 	Container contentPane = getContentPane();
 
 
 	//Adds the labels, text fields, and buttons to the panel
 	panelAdder.add(labelA);
 	panelAdder.add(textFieldLAmount);
 
 	panelAdder.add(labelB);
 	panelAdder.add(textFieldLTerm);
 
 	panelAdder.add(labelC);
 	panelAdder.add(textFieldIntRate);
 
	panelAdder.add(labelD);
	panelAdder.add(textFieldMoPayment);
	panelAdder.add(resetCalc);
	setContentPane(panelAdder);
	pack();
}
 
 
 public void actionPerformed(ActionEvent event)
 {
	//System.out.println("Action Button");
	//String command = event.getActionCommand();
 
		    java.text.DecimalFormat two = new java.text.DecimalFormat("###,###.00");
			NumberFormat currency = NumberFormat.getCurrencyInstance();
			double paymentAmount = loanAmount;
			textFieldMoPayment.setText("" + (currency.format(paymentAmount)));
			textFieldPayment.append ("Payment #  \t  Remaining Balance  \t  Interest Paid\n");
 
			loanAmt = Double.parseDouble (textFieldLAmount.getText());
 
			for (int count = 1; count <=(termInMonths); count++)
			{
				Balance = loanAmt;
				monthlyInterest=(((intRate/100.0)/12.0)*Balance);
				monthlyPrinciple=(paymentAmount-monthlyInterest);
				loanAmt=(Balance-monthlyPrinciple);
				textFieldPayment.append (count + " \t" + currency.format(loanAmt) + " \t\t " + currency.format(monthlyInterest)+"\n");
            }
    }
 
 
	if ("resetCalc".equals(event.getActionCommand()))
        {
            ClearFields ();
        }
 
        else
        {
            //end and close application
            System.exit(0);
        }
 
}
 
    {
        //Set all text fields to blank
        textFieldMoPayment.setText ("");
        textFieldLAmount.setText ("");
        textFieldPayment.setText ("");
    }
 
  }

           
         

Related Solutions: Learning Java for the 1st time (cont.)

	Title
1	Learning Java for the 1st time
2	Learning Java for the 1st time (cont.)

Learning Java for the 1st time (cont.2)

Asked by -CyberIT- in Java Programming Language, New to Java Programming

Tags: Java, New to Java

About this solution