JTextField event output problem

Question

Hello,
I am learning Java 2 and creating a swing program to handle mortgage amortization calcs. I have a main and event file.
In the main, I have JTextFields to display the output of the variable calculations that run in the event program.
Everything seems to be functioning properly, except that only the last run through the loop displays. I have experimented with "thread sleep" to slow the loop, but still the only output is the last run through the loop.
Is there anything simple concerning JTextField output and looping that Ive missed?
Here is my loop:
void startCalc() {
               gui.calc.setEnabled(true);
               gui.reset.setEnabled(true);
                    //get input values and convert from text to numbers
          double prin1 = Double.parseDouble(gui.principle.getText());
               double interest1 = Double.parseDouble(gui.iRate.getText());
               int term1 = Integer.parseInt(gui.years.getText());
                    // start monthly payment calc
               double moint1 = interest1/(12*100);
               double month1 = term1*12;
               double pay1 = (prin1 * (moint1/(1-(Math.pow(1 + moint1,-month1)))));
                              // output to mortgui1
          NumberFormat formatter = new DecimalFormat("0.00");
          gui.pay.setText("$"+ formatter.format(pay1));
          double begin1 = prin1;
                    for(int loan1=0;loan1 < month1;loan1++) {
                              double intpaid1 = (moint1) * begin1;
                              double prpaid1 = pay1 - intpaid1;
                              double end1 = begin1 - prpaid1;
                    begin1 = end1;
               try{
                    Thread.sleep(100);
                    }catch(InterruptedException e){ };
          gui.amortize.setText("Payment number"+(loan1+1));
                    gui.ipaid.setText("Interest paid is $" formatter.format(intpaid1) " Principal paid is $" +formatter.format(prpaid1));
                    gui.balance.setText("Ending balance is $" +formatter.format(end1));
                    }

Answer 1

Thanks, as you can see Im pretty new to Java... I will need to add gui.* to the methods you have shown me correct?
Here is my full code for the event. Mortgui2 is the main file where I have the guis set up.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import java.text.*;
import javax.swing.text.*;
public class Mort2JR implements ActionListener, ItemListener {
Mortgui2 gui;
public Mort2JR(Mortgui2 in){
gui = in;
// Array for 3 hardcode morts and one freeform
public void actionPerformed(ActionEvent event){
String command = event.getActionCommand();
if (command == "Clear")
clearAllFields();
if (command == "Calculate")
     startCalc();
public void itemStateChanged(ItemEvent event) {
     Object item = event.getItem();
     if (item == gui.sevenYear) {
          gui.iRate.setText("5.35");
          gui.years.setText("7");
          gui.iRate.setEnabled(false);
          gui.years.setEnabled(false);
     if (item == gui.fifteenYear) {
          gui.iRate.setText("5.5");
          gui.years.setText("15");
          gui.iRate.setEnabled(false);
          gui.years.setEnabled(false);
          gui.adhoc.setEnabled(true);
     if (item == gui.thirtyYear) {
          gui.iRate.setText("5.75");
          gui.years.setText("30");
          gui.iRate.setEnabled(false);
          gui.years.setEnabled(false);
          gui.adhoc.setEnabled(true);
     if (item == gui.adhoc) {
          gui.iRate.setEnabled(true);
          gui.years.setEnabled(true);
          void clearAllFields(){
gui.principle.setText(null);
gui.iRate.setText(null);
gui.years.setText(null);
gui.pay.setText(null);
void startCalc() {
               gui.calc.setEnabled(true);
               gui.reset.setEnabled(true);
                    //get input values and convert from text to numbers
          double prin1 = Double.parseDouble(gui.principle.getText());
               double interest1 = Double.parseDouble(gui.iRate.getText());
               int term1 = Integer.parseInt(gui.years.getText());
                    // start monthly payment calc
               double moint1 = interest1/(12*100);
               double month1 = term1*12;
               double pay1 = (prin1 * (moint1/(1-(Math.pow(1 + moint1,-month1)))));
                              // output to mortgui1
          NumberFormat formatter = new DecimalFormat("0.00");
          gui.pay.setText("$"+ formatter.format(pay1));
//// Delay between new Mortage amortization schedule
                    //               try{
                    //                         Thread.sleep(4000); // 4000 milliseconds
                    //                         }catch(InterruptedException e){ };
               // Amortization loop will calculate object attributes for outfile
               double begin1 = prin1;
                    for(int loan1=0;loan1 < month1;loan1++) {
                              double intpaid1 = (moint1) * begin1;
                              double prpaid1 = pay1 - intpaid1;
                              double end1 = begin1 - prpaid1;
                    begin1 = end1;
               try{
                    Thread.sleep(100);
                    }catch(InterruptedException e){ };
          gui.amortize.setText("Payment number"+(loan1+1));
                    gui.ipaid.setText("Interest paid is $" formatter.format(intpaid1) " Principal paid is $" +formatter.format(prpaid1));
                    gui.balance.setText("Ending balance is $" +formatter.format(end1));