Question

Write a Java class (name it TwoNumbers) that will manage two numbers.

The class should have two integer variables.

The class should have the following constructors:

- TwoNumbers();

- TwoNumbers(3, 4);

The first constructor should initialize the class variables to zero.

The second constructor should initialize the class variables to the passed variables.

The class should have the following methods:

- setNumbers(3, 4);

- setFirstNum(3);

- setSecondNum(4);

- getSum();

- getDiff();

- getProd();

The setNumbers(3, 4) method should initialize the two variables of the class to the passed values.

The setFirstNum(3) method should initialize the first variable of the class to the passed value.

The setSecondNum(4) method should initialize the second variable of the class to the passed value.

The getSum() method should return the sum of the two variables in the class.

The getDiff() method should return the difference of the two variables in the class.

The getProd() method should return the product of the two variables in the class.

Also add the method main to call on the methods above.

Please write out the code. No screen shots please.

Answer 1

Java Code:

public class TwoNumbers{

   private int x,y;

   //Constructors
  
   public TwoNumbers()
   {
       x = 0;
       y = 0;
   }
  
   public TwoNumbers(int a,int b)
   {
       x = a;
       y = b;
   }

    //This will change both x and y to given arguments
   public void setNumbers(int a,int b)
   {
       x = a;
       y = b;
   }

    //This will change x to given argument
   public void setFirstNum(int a)
   {
       x = a;
   }
  
    //This will change y to given argument
   public void setSecondNum(int b)
   {
       y = b;
   }

    //returns the sum
   public int getSum()
   {
       return x+y;
   }

    //return the difference
   public int getDiff()
   {
       return x-y;
   }

    //return the product
   public int getProd()
   {
       return x*y;
   }
  
    public static void main(String []args){

       //Creating an object for the class
      
        TwoNumbers twonum = new TwoNumbers(3,4);
        System.out.println("The numbers are 3 and 4");
        System.out.println("Sum is "+twonum.getSum());
        System.out.println("Difference is "+twonum.getDiff());
        System.out.println("Product is "+twonum.getProd());

        twonum.setNumbers(5,4);
        System.out.println("The numbers are changed to 5 and 4");
        System.out.println("Sum is "+twonum.getSum());
        System.out.println("Difference is "+twonum.getDiff());
        System.out.println("Product is "+twonum.getProd());

     }
}

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