Finish the JAVA graphical application with three labeled text fields, one each f

Question

Finish the JAVA graphical application with three labeled text fields, one each for the initial amount of savings account, the annual interest rate, and the number of years. Add a button “Calculate” and a read-only text area to display the balance of the savings account after the end of each year.

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

import javax.swing.AbstractButton;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class SavingsCalculatorFrameTester {
   public static void main(String[] args) {
              JFrame frame=new SavingsCalculatorFrame();
              frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
              frame.setVisible(true);
       }     

   public static class SavingsCalculatorFrame extends JFrame
   {

   private static final long serialVersionUID = 1L;
   private JTextField initialBalanceField;
   private JTextField annualRateField;
   private JTextField yearsField;
   private JTextArea balanceArea;

   private static final int FRAME_WIDTH = 300;
   private static final int FRAME_HEIGHT = 400;

   public SavingsCalculatorFrame()
   {
   setSize(FRAME_WIDTH, FRAME_HEIGHT);
   add(createControlPanel());
   }

   private JPanel createControlPanel()
   {
   final int FIELD_WIDTH = 10;
   final int AREA_WIDTH = 20;
   final int AREA_HEIGHT = 10;

   //Text fields and Text Area
   initialBalanceField = new
   annualRateField = new
   yearsField = new
   balanceArea = new
   balanceArea.setEditable(false);

   JPanel panel = new JPanel();
   // add to panel labels and text fields and text area
  
   return panel;
   }

   private JButton createCalculateButton()
   {
         
   JButton calculateButton = new

   class ButtonListener implements ActionListener
   {
   public void actionPerformed(ActionEvent event)
   {
  
   for (int year = 1; year <= nyears; year++)
   {
     
      
      
   }
   }
   }

   ActionListener listener = new ButtonListener();
       calculateButton.addActionListener(listener);
   return calculateButton;
   }
   }
}

Explanation / Answer

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.AbstractButton;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
public class SavingsCalculatorFrameTester {
public static void main(String[] args) {
JFrame frame=new SavingsCalculatorFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}   
public static class SavingsCalculatorFrame extends JFrame
{
private static final long serialVersionUID = 1L;
private JTextField initialBalanceField;
private JTextField annualRateField;
private JTextField yearsField;
private JTextArea balanceArea;
private static final int FRAME_WIDTH = 300;
private static final int FRAME_HEIGHT = 400;
public SavingsCalculatorFrame()
{
setSize(FRAME_WIDTH, FRAME_HEIGHT);
add(createControlPanel());
}
private JPanel createControlPanel()
{
final int FIELD_WIDTH = 10;
final int AREA_WIDTH = 20;
final int AREA_HEIGHT = 10;
//Text fields and Text Area
initialBalanceField = new
annualRateField = new
yearsField = new
balanceArea = new
balanceArea.setEditable(false);
JPanel panel = new JPanel();
// add to panel labels and text fields and text area
  
return panel;
}
private JButton createCalculateButton()
{

JButton calculateButton = new
class ButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
   double init_amt,int_rate, nyear;
       init_amt=Double.parseDouble(initialBalanceField.getText());
int_rate=Double.parseDouble(annualRateField.getText());   
int_rate=Double.parseDouble(annualRateField.getText());
   nyears=Double.parseDouble(yearsField.getText());   

   double yint,sa=0;
for (int year = 1; year <= nyears; year++)
{
       yint=init_amt*int_rate/100;
      
       init_amt=init_amt+yint;             
  
  
}
   balanceArea.setText(String.valueOf(init_amt));  
}
}
ActionListener listener = new ButtonListener();
calculateButton.addActionListener(listener);
return calculateButton;
}
}
}

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