Question

I am an eighth grader with a tight deadline on a java project. I have my GUI all ready to go, except I need to take the two values from the two text fields, and send them to a method in a different class when I press a button. I am having trouble calling the method I need. All important code is below.

Code that is attempting to call the method:

 private void GoButtonActionPerformed(java.awt.event.ActionEvent evt) {                                         

    String Ntextfield = NumberTextField.getText();
    n = Integer.parseInt(Ntextfield);

    String Rtextfield = RateTextField.getText();
    r = Integer.parseInt(Rtextfield);
    //call PermMath class
    PermMath doTheMath = new PermMath();
    doTheMath.permutations(int n, int r);
}  

Method I am trying to call:

class PermMath {
  static long factorial(int num){
      //other code is here
  }
  static long permutations(int n, int r){
        //code I want to call is here
  }
}

Answer 1

It seems to me you have two mistakes:

1. You are passing two temporary integers called n and r instead of passing the two integers you modified earlier in your GoButtonActionPerformed function.
2. The permutations function is static, so there is no need to actually create an instance of the PermMath class.

Changing the function call to this should do it:

PermMath.permutations(n, r);