A Simple Car Loan Payment Calculator

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#1

I made this project (https://www.codecademy.com/courses/learn-java/projects/loan-payment-calculator?action=resume_content_item) more complex than it was asked. In order to add more instances.

And it works. But I need to know is there any idea to make code better or it’s fine?

public class CarLoan {
	
  int carLoan;
  int loanLength;
  int interestRate;
  int downPayment;
 
 public CarLoan(int loan, int loanl, int interestr, int downPay) {
  
  carLoan = loan;
  loanLength = loanl;
  interestRate = interestr;
  downPayment = downPay;
   
    if (loanl <= 0) {
      System.out.println("Error! You must take out a valid car loan.");
		} else if (downPay >= loan) {
		  System.out.println("The car can be paid in full.");
	}
 }
  
  public void monthyPayment() {
    int remainingBalance = carLoan - downPayment;
    int months = loanLength * 12;
    int monthlyBalance = remainingBalance / months;
    int interest = (monthlyBalance * interestRate) / 100;
    int monthlyP = monthlyBalance + interest;
    System.out.println(monthlyP);
  }

  public static void main(String[] args) {
  
    CarLoan client1 = new CarLoan (10000, 3, 5, 2000);
    client1.monthyPayment();
    
    CarLoan client2 = new CarLoan (10000, 4, 2, 500);
    client2.monthyPayment();
  
  	}
}
#2

Since you’re not doing anything with the instance other than call a method, the whole thing could be just a method

So instead of:

CarLoan client1 = new CarLoan (10000, 3, 5, 2000);
client1.monthyPayment();

you would have:

monthyPayment(10000, 3, 5, 2000);