Java Program to Add Two Complex Numbers by Passing Class to a Function

In this program, you’ll learn to add two complex numbers in Java by creating a class named Complex and passing it into a function add().

Example: Add Two Complex Numbers

  1. public class Complex {
  2. double real;
  3. double imag;
  4. public Complex(double real, double imag) {
  5. this.real = real;
  6. this.imag = imag;
  7. }
  8. public static void main(String[] args) {
  9. Complex n1 = new Complex(2.3, 4.5),
  10. n2 = new Complex(3.4, 5.0),
  11. temp;
  12. temp = add(n1, n2);
  13. System.out.printf("Sum = %.1f + %.1fi", temp.real, temp.imag);
  14. }
  15. public static Complex add(Complex n1, Complex n2)
  16. {
  17. Complex temp = new Complex(0.0, 0.0);
  18. temp.real = n1.real + n2.real;
  19. temp.imag = n1.imag + n2.imag;
  20. return(temp);
  21. }
  22. }

When you run the program, the output will be:

Sum = 5.7 + 9.5i

In the above program, we created a class Complex with two member variables: real and imag. As name suggests, real stores real part of a complex number and imag stores the imaginary part.

The Complex class has a constructor with initializes the value of real and imag.

We also created a new static function add() that takes two complex numbers as parameters and returns the result as a complex number.

Inside the add() method, we just add the real and imaginary parts of complex numbers n1 and n2, store it in a new variable temp and return temp.

Then, in the calling function main(), we print it using printf() function.