public class ComplexNumber {
        private int a;
        private int b;

        public ComplexNumber() {
        }

        public ComplexNumber(int a, int b) {
                this.a = a;
                this.b = b;
        }

        public String getComplexValue() {
                if (this.b < 0) {
                        return a + "" + b + "i";
                } else {
                        return a + "+" + b + "i";
                }
        }

        public static String addition(ComplexNumber num1, ComplexNumber num2) {
                int a1 = num1.a + num2.a;
                int b1 = num1.b + num2.b;
                if (b1 < 0) {
                        return a1 + "" + b1 + "i";
                } else {
                        return a1 + "+" + b1 + "i";
                }
        }

        public static void main(String args[]) {
                ComplexNumber com1 = new ComplexNumber(5, 3);
                ComplexNumber com2 = new ComplexNumber(-2, 3);
                System.out.println(com1.getComplexValue());
                System.out.println(com2.getComplexValue());
                System.out.println("Addition of Complex Numbers is :"
                                + ComplexNumber.addition(com1, com2));


        }
}