Question

How would you draw a UML chart for Intro to Java Liang (10th edition) Chapter 13 #17PE? I am confused if you start with the main application then a separate box for the class.

This is the assignment which I have the programming complete but stuck on UML Chart.

Design a class named Complex for representing complex numbers and the methods add, subtract, multiply, divide, and abs for performing complexnumber operations, and override toString method for returning a string representation for a complex number. The toString method returns (a + bi) as a string. If b is 0, it simply returns a. Your Complex class should also implement the Cloneable interface. Provide three constructors Complex(a, b), Complex(a), and Complex(). Complex() creates a Complex object for number 0 and Complex(a) creates a Complex object with 0 for b. Also provide the getRealPart() and getImaginaryPart() methods for returning the real and imaginary part of the complex number, respectively. Write a test program that prompts the user to enter two complex numbers and displays the result of their addition, subtraction, multiplication, division, and absolute

Answer 1

Note: Could you plz go this code and let me know if u need any changes in this.Thank You
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// Complex.java

public class Complex implements Cloneable {

   private double a;
   private double b;

   public Complex(double a, double b) {
       this.a = a;
       this.b = b;
   }

   public Complex(double a) {
       this.a = a;
       b = 0;
   }

   public Complex() {
       this.a = 0;
       this.b = 0;
   }

   public double getRealPart() {
       return a;
   }

   public double getImaginaryPart() {
       return b;
   }

   @Override
   public String toString() {
       return "(" + a + "+i" + b + "}";
   }

   public Complex add(Complex com1) {

       return new Complex(com1.getRealPart() + a, com1.getImaginaryPart() + b);
   }

   public Complex subtract(Complex com1) {
       return new Complex(com1.getRealPart() - a, com1.getImaginaryPart() - b);
   }

   public Complex multiply(Complex com1) {
       Complex comp = new Complex();
       comp.a = (this.a * com1.a) - (this.b * com1.b);
       comp.b = (this.a * com1.b) + (this.b * com1.a);
       return comp;

   }

   public Complex divide(Complex com1) {
       double denominator = Math.pow(com1.mod(), 2);
       return new Complex(((this.a * com1.a) + (this.b * com1.b)) / denominator, ((this.b * com1.a) - (this.a * com1.b)) / denominator);

   }
   public double mod() {
       if (a != 0 || b != 0) {
       return Math.sqrt(a * a + b * b);
       } else {
       return 0.0;
       }
       }

   public Complex abs() {

       return new Complex(Math.abs(a), Math.abs(b));
   }

   @Override
   protected Object clone() {
       return new Complex(a, b);
   }

}

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// Test.java

import java.util.Scanner;

public class Test {
   public static void main(String[] args) {
       Scanner input = new Scanner(System.in);
       System.out.print("Enter the first complex number: ");
       double a = input.nextDouble();
       double b = input.nextDouble();
       Complex c1 = new Complex(a, b);
       System.out.print("Enter the second complex number: ");
       double c = input.nextDouble();
       double d = input.nextDouble();
       Complex c2 = new Complex(c, d);
       System.out.println("(" + c1 + ")" + " + " + "(" + c2 + ")" + " = "
               + c1.add(c2));
       System.out.println("(" + c1 + ")" + " - " + "(" + c2 + ")" + " = "
               + c1.subtract(c2));
       System.out.println("(" + c1 + ")" + " * " + "(" + c2 + ")" + " = "
               + c1.multiply(c2));
       System.out.println("(" + c1 + ")" + " / " + "(" + c2 + ")" + " = "
               + c1.divide(c2));
       System.out.println("|" + c1 + "| = " + c1.mod());
       Complex c3 = (Complex) c1.clone();
       System.out.println(c1 == c3);
       System.out.println(c3.getRealPart());
       System.out.println(c3.getImaginaryPart());
   }
}

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Output:

Enter the first complex number: 3.5 5.5
Enter the second complex number: -3.5 1
((3.5+i5.5}) + ((-3.5+i1.0}) = (0.0+i6.5}
((3.5+i5.5}) - ((-3.5+i1.0}) = (-7.0+i-4.5}
((3.5+i5.5}) * ((-3.5+i1.0}) = (-17.75+i-15.75}
((3.5+i5.5}) / ((-3.5+i1.0}) = (-0.5094339622641509+i-1.7169811320754718}
|(3.5+i5.5}| = 6.519202405202649
false
3.5
5.5

_______________Could you plz rate me well.Thank You

UML Diagram

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