For the loan payments, the user is to choose whether the loan is for a mortgage,

Question

For the loan payments, the user is to choose whether the loan is for a mortgage, a student loan, an auto loan, or a personal loan. For Mortgage: assume $250,000 balance and payment of $2000 per month; For Student Loan: assume $55,000 balance and payment of $200 per month; For Auto Loan, assume $45,000 balance and payment of $500 per month; For Personal Loan, assume $4,000 and payment of $1000 per month.

Here is the java gui code, what it does is gives the option to make payments to your actual loan amount.

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;

@SuppressWarnings("serial")
public class loan extends JFrame implements ActionListener{
JLabel paymentLabel =new JLabel("Are you making a payment on your loan",SwingConstants.CENTER);

JPanel canvasPanel =new JPanel();
JPanel buttons=new JPanel();

JButton yesButton =new JButton("Yes");
JButton noButton =new JButton("No");
public loan(){
super("Loan Payment"); // setting title of the window to Load Payment
setSize(300,150); // setting size of the window
setDefaultCloseOperation(EXIT_ON_CLOSE); // setting what should happen when window is closed

canvasPanel.setLayout(new BorderLayout()); // setting layout of the display panel to borderLayout
canvasPanel.add(paymentLabel, BorderLayout.CENTER); // displaying payment label
canvasPanel.add(buttons, BorderLayout.SOUTH); // adding buttons to the layout

buttons.add(yesButton);
buttons.add(noButton);

yesButton.addActionListener(this); // setting an action listener on yesButton
noButton.addActionListener(this); // setting an action listener on noButton

add(canvasPanel); // adding this panel to the window

setVisible(true); // setting the window visible
}

// this method gets called when yesButton or noButton is clicked
@Override
public void actionPerformed(ActionEvent e) {
if(e.getSource()== yesButton){ // do this when yesButton is clicked
String input=JOptionPane.showInputDialog(new JFrame(), "How much are you paying on your loan?"); // show input dialog that takes input
if(input!=null){
Double res=Double.parseDouble(input);
customer.makeLoanPayment(res); // make the loan payment
JOptionPane.showMessageDialog(new JFrame(),customer.displayLoan()); // show message indicating if the customer is done with the transaction.
int selectedOption = JOptionPane.showConfirmDialog(null,
"Are you done with your transaction?",
"Choose",
JOptionPane.YES_NO_OPTION);
if (selectedOption == JOptionPane.YES_OPTION) { // if yes, close the window..
this.dispose();
}
else{ // if no, redo this again
JOptionPane.showMessageDialog(new JFrame()," "+customer.displayCheck()+" "+customer.displaySav()+" "+customer.displayLoan()+" ");
}
}
}
else if(e.getSource()== noButton){ // do this when yesButton is clicked
this.dispose(); // close the window
}
}
}

Explanation / Answer

Solution:

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;

@SuppressWarnings("serial")
public class loan extends JFrame implements ActionListener{
   JLabel paymentLabel=new JLabel("Are you making a payment on your loan",SwingConstants.CENTER);


   JPanel canvasPanel=new JPanel();
   JPanel buttons=new JPanel();

   JButton yesButton=new JButton("Yes");
   JButton noButton=new JButton("No");
   public loan(){
       super("Loan Payment"); // setting title of the window to Load Payment
       setSize(300,150); // setting size of the window
       setDefaultCloseOperation(EXIT_ON_CLOSE); // setting what should happen when window is closed
    
       canvasPanel.setLayout(new BorderLayout()); // setting layout of the display panel to borderLayout
       canvasPanel.add(paymentLabel, BorderLayout.CENTER); // displaying payment label
       canvasPanel.add(buttons, BorderLayout.SOUTH); // adding buttons to the layout
    
       buttons.add(yesButton);
       buttons.add(noButton);
    
       yesButton.addActionListener(this); // setting an action listener on yesButton
       noButton.addActionListener(this); // setting an action listener on noButton
    
       add(canvasPanel); // adding this panel to the window
    
       setVisible(true); // setting the window visible
   }
   // this method gets called when yesButton or noButton is clicked
   @Override
   public void actionPerformed(ActionEvent e) {
       if(e.getSource()==yesButton){ // do this when yesButton is clicked
           String input=JOptionPane.showInputDialog(new JFrame(), "How much are you paying on your loan?"); // show input dialog that takes input
           if(input!=null){
               Double res=Double.parseDouble(input);
               customer.makeLoanPayment(res); // make the loan payment
               JOptionPane.showMessageDialog(new JFrame(),customer.displayLoan());// show message indicating if the customer is done with the transaction.
               int selectedOption = JOptionPane.showConfirmDialog(null,
                   "Are you done with your transaction?",
                   "Choose",
                   JOptionPane.YES_NO_OPTION);
               if (selectedOption == JOptionPane.YES_OPTION) { // if yes, close the window..
                   this.dispose();
               }
               else{ // if no, redo this again
                   JOptionPane.showMessageDialog(new JFrame(),"<html>"+customer.displayCheck()+"<br>"+customer.displaySav()+"<br>"+customer.displayLoan()+"</html>");
               }
           }
       }
       else if(e.getSource()==noButton){ // do this when yesButton is clicked
           this.dispose(); // close the window
       }
   }
}

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