public class Complex {

// These are the data of the ADT

private double real;

private double imaginary;

// These are the operations of the ADT

public Complex(double real, double anImaginary) {

this.real = real;

imaginary = anImaginary;

}

public Complex plus(Complex other) {

double resultReal = this.real + other.real;

double resultImaginary = this.imaginary + other.imaginary;

return new Complex(resultReal, resultImaginary);

}

public String toString() {

return "Complex(" + real + ", " + imaginary + ")";

}

public static void main(String[] args) {

Complex a = new Complex(1.0, 2.0);

Complex b = new Complex(3.0, 4.0);

Complex c = a.plus(b);

System.out.println(a + " plus " + b + " = " + c);

}

}