Thread: Amortization Schedule Table Help.

Hi, I am making an Amortization Schedule and am having trouble with the table. Is there a way to set the number of rows in the table? Can I set that based off of how many payments the user will make on their loan. Thanks!

Code:

import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
import javax.swing.*;
public class AmortizationGUI extends JFrame implements ActionListener {
 
 
 
	public AmortizationGUI(){
		Font font = new Font("Arial",Font.PLAIN,16);
		Font fieldFont = new Font("Arial", Font.PLAIN,14);
		//JFrame attributes
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setTitle("Amortization Schedule");
		setSize(800,800);
		setLocationRelativeTo(null);
		setResizable(false);
		//initialize panel
		JPanel panel = new JPanel();
		panel.setLayout(null);
 
 
 
		//initialize JLabels
		JLabel lA = new JLabel("Loan Amount:");
		lA.setLocation(50,50);
		lA.setFont(font);
		lA.setSize(100,50);
		lA.setVisible(true);
		JLabel iR = new JLabel("Interest Rate:");
		iR.setSize(100,50);
		iR.setFont(new Font("Arial",Font.PLAIN,17));
		iR.setLocation(50,100);
		iR.setVisible(true);
		JLabel yL = new JLabel("Years of Loan:");
		yL.setSize(100,50);
		yL.setLocation(49,150);
		yL.setVisible(true);
		yL.setFont(font);
		//initialize JTextFields
		JTextField lAField = new JTextField(40);
		lAField.setSize(70,20);
		lAField.setLocation(150,66);
		lAField.setVisible(true);
		lAField.setFont(fieldFont);
		lAField.setBorder(BorderFactory.createLineBorder(Color.BLACK));
		JTextField iRField = new JTextField(10);
		iRField.setSize(70,20);
		iRField.setLocation(150,116);
		iRField.setVisible(true);
		iRField.setFont(fieldFont);
		iRField.setBorder(BorderFactory.createLineBorder(Color.BLACK));
		JTextField yLField = new JTextField(10);
		yLField.setSize(70,20);
		yLField.setLocation(150,166);
		yLField.setVisible(true);
		yLField.setFont(fieldFont);
		yLField.setBorder(BorderFactory.createLineBorder(Color.black));
 
		//initialize button
		JButton calc = new JButton("Calculate");
		calc.setSize(100,50);
		calc.setLocation(100,206);
		calc.setVisible(true);
		calc.setFont(font);
		calc.setBorder(BorderFactory.createLineBorder(Color.BLACK));
		//button ActionListener
 
		//initialize table
		JTable table;
 
		String columnNames[] ={"Payment #","Amount Paid","Principal","Interest","Balance"};
 
 
		Object data[][] = {
				{"","","","",""}
		};
 
		table = new JTable(data,columnNames);
		table.setPreferredScrollableViewportSize(new Dimension(400,100));
		table.setFillsViewportHeight(true);
 
		JScrollPane scrollPane = new JScrollPane(table);
		scrollPane.setBounds(250,200,500,500);
 
		//adding elements 
		panel.add(lA);
		panel.add(iR);
		panel.add(yL);
		panel.add(lAField);
		panel.add(iRField);
		panel.add(yLField);
		panel.add(calc);
		panel.add(scrollPane);
 
 
		panel.setVisible(true);
		add(panel);
 
 
	}
 
 
 
 
	public static void main(String[] args){
		AmortizationGUI gui = new AmortizationGUI();
 
		gui.setVisible(true);
 
	}
 
 
 
 
	@Override
	public void actionPerformed(ActionEvent arg0) {
		// TODO Auto-generated method stub
 
	}
 
 
 
 
 
 
}

Moderation: original moderated post "approved" and is now visible.

As for your number of rows -- that equals the number of payments and is part of the amortization formula.