I need an Array in my JAVA CODE

Question

I need an array in my java code for my last class in my Java 1 course
my code does compile in dos using javac,....and it does work
It is a mortgage calculator for 3 loans of 3 different years loaned,.... and each have a different interest rate.
I need to have my code in an ARRAY for my last week .
any help would be appreciated
here is my code :
import java.text.*;           //20 May 2008, Revision ...many
import java.io.IOException;
class memortgage     //program class name
  public static void main(String[] args) throws IOException
    double amount,moPay,totalInt,principal = 200000; //monthly payment, total interest and principal
    double rate [ ] = {.0535, .055, .0575};          //the three interest rates
    int [ ] term = {7,15,30};                        //7, 15 and 30 year term loans
    int time,ratePlace = 0,i,pmt=1,firstIterate = 0,secondIterate = 0,totalMo=0;
    char answer,test;
    boolean validChoice;
    System.in.skip(System.in.available());           //clear the stream for the next entered character
    do
      validChoice = true;
      System.out.println("What Choice would you Like\n");
      System.out.println("1-Interest rate of 5.35% for 7 years?");       //just as it reads for each to select from
      System.out.println("2-Interest rate of 5.55% for 15 years?");
      System.out.println("3-Interest rate of 5.75% for 30 years?");
      System.out.println("4-Quit");
      answer = (char)System.in.read();
      if (answer == '1')  //7 yr loan at 5.35%
        ratePlace = 0;
        firstIterate = 4;
        secondIterate = 21;
        totalMo= 84;
      else if (answer == '2') //15 yr loan at 5.55%
        ratePlace = 1;
        firstIterate = 9;      //it helps If I have the correct numbers to calcualte as in 9*20 to equal 180...that why I was off -24333.76
        secondIterate = 20;    //now it is only of -0.40 cents....DAMN ME
        totalMo = 180;
      else if (answer == '3') //30 yr loan at 5.75%
        ratePlace = 2;
        firstIterate = 15;
        secondIterate = 24;
        totalMo = 360;
      else if (answer == '4') //exit or quit
        System.exit(0);
      else
        System.in.skip(System.in.available());               //validates choice
        System.out.println("Invalid choice, try again.\n\n");
        validChoice = false;
    }while(!validChoice);  //when a valid choice is found calculate the following, ! means not, similar to if(x != 4)
    for(int x = 0; x < 25; x++)System.out.println();
    amount = (principal + (principal * rate[ratePlace] * term[ratePlace] ));
    moPay = (amount / totalMo);
    totalInt = (principal * rate[ratePlace] * term[ratePlace]);
    DecimalFormat df = new DecimalFormat("0.00");
    System.out.println("The Interest on $" + (df.format(principal) + " at " + rate[ratePlace]*100 +
    "% for a term of "+term[ratePlace]+" years is \n" +"$"+ (df.format(totalInt) +" Dollars\n")));
    System.out.println("\nThe total amount of loan plus interest is $"+(df.format(amount)+" Dollars.\n"));
    System.out.println("\nThe Payments spread over "+term[ratePlace]* 12+" months would be $"+
    (df.format (moPay) + " Dollars a month\n\n"));
    System.in.skip(System.in.available());
    System.out.println("\nWould you like to see a planned payment schedule? y for Yes, or x to Exit");
    answer = (char)System.in.read();
    if (answer == 'y')
      System.out.println((term[ratePlace]*12) + " monthly payments:");
      String monthlyPayment = df.format(moPay);
      for (int a = 1; a <= firstIterate; a++)
        System.out.println(" Payment Schedule \n\n ");
        System.out.println("Month Payment Balance\n");
        for (int b = 1; b <= secondIterate; b++)
          amount -= Double.parseDouble(monthlyPayment);
          System.out.println(""+ pmt++ +"\t"+ monthlyPayment + "\t"+df.format(amount));
        System.in.skip(System.in.available());
        System.out.println(("This Page Is Complete Press [ENTER] to Continue"));
        System.in.read();
}

Answer 1

here is what was commented from my instructor for my week 4...is what you sen in the code....but I fixed loan 2 tonight
"Week 4 Great work, the numbers were a little off on the 1st and 2nd loans. Next time
try putting the values you displayed in an array. "
import java.text.*;           //20 May 2008, Revision ...many
import java.io.IOException;
class memortgage     //program class name
  public static void main(String[] args) throws IOException
    double amount,moPay,totalInt,principal = 200000; //monthly payment, total interest and principal
    double rate [ ] = {.0535, .055, .0575};          //the three interest rates
    int [ ] term = {7,15,30};                        //7, 15 and 30 year term loans
    int time,ratePlace = 0,i,pmt=1,firstIterate = 0,secondIterate = 0,totalMo=0;
    char answer,test;
    boolean validChoice;
    System.in.skip(System.in.available());           //clear the stream for the next entered character
    do
      validChoice = true;
      System.out.println("What Choice would you Like\n");
      System.out.println("1-Interest rate of 5.35% for 7 years?");       //just as it reads for each to select from
      System.out.println("2-Interest rate of 5.55% for 15 years?");
      System.out.println("3-Interest rate of 5.75% for 30 years?");
      System.out.println("4-Quit");
      answer = (char)System.in.read();
      if (answer == '1')  //7 yr loan at 5.35%
        ratePlace = 0;
        firstIterate = 4;
        secondIterate = 21;
        totalMo= 84;
      else if (answer == '2') //15 yr loan at 5.55%
        ratePlace = 1;
        firstIterate = 9;      //it helps If I have the correct numbers to calcualte as in 9*20 to equal 180...that why I was off -24333.76
        secondIterate = 20;    //now it is only of -0.40 cents....DAMN ME
        totalMo = 180;
      else if (answer == '3') //30 yr loan at 5.75%
        ratePlace = 2;
        firstIterate = 15;
        secondIterate = 24;
        totalMo = 360;
      else if (answer == '4') //exit or quit
        System.exit(0);
      else
        System.in.skip(System.in.available());               //validates choice
        System.out.println("Invalid choice, try again.\n\n");
        validChoice = false;
    }while(!validChoice);  //when a valid choice is found calculate the following, ! means not, similar to if(x != 4)
    for(int x = 0; x < 25; x++)System.out.println();
    amount = (principal + (principal * rate[ratePlace] * term[ratePlace] ));
    moPay = (amount / totalMo);
    totalInt = (principal * rate[ratePlace] * term[ratePlace]);
    DecimalFormat df = new DecimalFormat("0.00");
    System.out.println("The Interest on $" + (df.format(principal) + " at " + rate[ratePlace]*100 +
    "% for a term of "+term[ratePlace]+" years is \n" +"$"+ (df.format(totalInt) +" Dollars\n")));
    System.out.println("\nThe total amount of loan plus interest is $"+(df.format(amount)+" Dollars.\n"));
    System.out.println("\nThe Payments spread over "+term[ratePlace]* 12+" months would be $"+
    (df.format (moPay) + " Dollars a month\n\n"));
    System.in.skip(System.in.available());
    System.out.println("\nWould you like to see a planned payment schedule? y for Yes, or x to Exit");
    answer = (char)System.in.read();
    if (answer == 'y')
      System.out.println((term[ratePlace]*12) + " monthly payments:");
      String monthlyPayment = df.format(moPay);
      for (int a = 1; a <= firstIterate; a++)
        System.out.println(" Payment Schedule \n\n ");
        System.out.println("Month Payment Balance\n");
        for (int b = 1; b <= secondIterate; b++)
          amount -= Double.parseDouble(monthlyPayment);
          System.out.println(""+ pmt++ +"\t"+ monthlyPayment + "\t"+df.format(amount));
        System.in.skip(System.in.available());
        System.out.println(("This Page Is Complete Press [ENTER] to Continue"));
        System.in.read();
}