Hello! I need some help regarding creating a complex number calculator program in Java. The program has three classes which follows:

Complex

ComplexCalculator

And ComplexCalculatorTest

Here is a sample output:

I have done most of the TODOs in both Complex and ComplexCalculator but I need help with doing the toString method in both classes. I do not know how to chain them. Also, it would be great if you could pinpoint any errors in the code and explain how I should fix them. Thank you so much for your time.

File Edit Scurce Refatr Navigate Search Preject Rur Winduw Help 11 1 package cst8284.calculator; 3 public class Conplex t 5 private double imaE ; private double real = ; 8 Complex constructor that takes in a single string, r.e. "2-4i 9 public Complex(String eStr th1s(c5tr .split("(?=\\+) | (?:\\-)")); // splits cstr at + or into an array of strings havin to elements - Thr first elrment of thr resultant array wil1 hr the real portion, while the second is the inaginarry por tie This array is passed to the next constructor 13 14 15 16 17 1 public Complex(Sting) Str 19 / Conplex constructor that takes in an array of two strings fron the above constructor TODD: chain the input from this constructor to the next constructor, that is, pass each elrment of thr array to the next ranstructor, whirh has a (String, Strin siEnature 21 this (cStr(aj, cStr[1]); 25 26 // Complex constructor that takes to separate strings as parameters, e.g. "2" and "-4i" public Complex(String-, string i)( //TODO : chain the input from this constructor te the next constructor, which has n (An, Ant) signa Lure Note that this constructor needs to strip the 'i' fron the string storing / thr imaginary nunbrr; it must pass anly an inteeer to the next ranstructor, otherwise an error results this(Integer parseIntr, Integer.porseint(i.replace("i", ))):I 2 and -A 35 // Cmrplex ronstructor that takes in two ints as paranrter9, 36 public Complex(int r, int i) 3/ TODD: chain the input from this constructor to the next constructor, whirh has a (dauhlr, douhl) signature 39 40 this((double), (double)i); 43/ Complex constructor that takes in two ints and stores then as floats, e.g. as 2.8 and-4. Ppublic Conplex (double r, double i 45 this.setReal(); Smart Insert21 1:73