Does it have to be swing? Are you trying to make something like this?
http://www.amortizationtable.org/amortization-calculator/

Does it have to be swing? Are you trying to make something like this?
http://www.amortizationtable.org/amortization-calculator/

Then do this on command line,
pseudo code
Display headers
for i=0 to 3
get inputs
calculate outputs
display as row
end

public class creditcardassignment

{



  public static void main(String[] args) {

    int run;
    int i=0;

    while(i < 4 ){

    String Run_Question = JOptionPane.showInputDialog(null, "How many times do you like to run the program? (Up to four runs only!)", JOptionPane.QUESTION_MESSAGE);

    run = Integer.parse(Run_Question);

    if(run > 4 && run <1) {

      JOptionPane.showMessageDialog(null, "The number is invalid,please try again!", "Error",

      JOptionPane.INFORMATION_MESSAGE);
     
      exit(0);
    }

    }
   
    List<Info> infoList = new Arraylist<Info>();
   
    for(int i=0; i<run; i++) {
//get input from users and calculate output
      //enter or calculate intialprinciple
      //enter or calculateintialpayment
      //enter or calculateAPR
      //enter or calculate noofpayments
      //enter or calculate totalinterestpaid
     
      //create info object
      //add allthe above principle, payment, apr, no of payments, interest paid to info object
      Info i = new Info();
      i.add(intialprinciple) and so on
     
     
      ArrayList.add(i);
    }
    //iterate and display content from List in tabular format

  }


}

public class Info {
    double initialPrinciple;
    double initialPayment;
    double APR;
    double noOfPayments;
    double totalInterestPaid;
   
    //add getter setter

}

/* Som ework for you  ... use you formula to calulate..just used semo formula
    use do while loop to take to input for 4 times only
*/


import javax.swing.JOptionPane;

import java.text.DecimalFormat;
import javax.swing.JFrame;
import javax.swing.JTextArea;


public class Table extends JFrame{
 private static JTextArea output;
 public Table(){
 int lp, ap,mp;
   int count=0;
    String loanPrincipal = JOptionPane.showInputDialog(null, "Enter Initial Loan Princial", JOptionPane.QUESTION_MESSAGE);
    String annualPercentage = JOptionPane.showInputDialog(null, "Enter Annual Percentage", JOptionPane.QUESTION_MESSAGE);
    String monthlyPayment = JOptionPane.showInputDialog(null, "Enter MonthlyPayment", JOptionPane.QUESTION_MESSAGE);
    if(loanPrincipal!=null && annualPercentage!=null && monthlyPayment!=null){
     lp = Integer.parseInt(loanPrincipal);
     ap= Integer.parseInt(loanPrincipal);
     mp=Integer.parseInt(loanPrincipal);
     output = new JTextArea(10,15);
     int results = lp * ap; // use your own formula to calculate : this is just a demo
     output.append("Loan Principal"+" "+"Annual %"+" "+"Monthly Payment"+" "+"Results");
     output.append("\n");
     output.append(lp +"\t"+ ap +"\t"+mp+ "\t"+ results);
     this.getContentPane().add(output,"Center");
     this.setSize(400,600);
     this.setLocation(100,200);
     this.show();
     count++;
    }else{
     JOptionPane.showMessageDialog(null, "The number is invalid,please try again!", "Error",
     JOptionPane.INFORMATION_MESSAGE);
     count++;
   }
 
 }
 public static void main(String[]args){
  Table t = new Table();
 }
}

O0ops !! that count++ in code was to take count input...forgot to remove everything....
right now it doesnt make any sense to have count ++
post if you need any further help..