Question

Homework assignment need help

3. Create the constructor, area and toString method for the following class (2 point) public class. Square private double a; Ll...area of square is a*a In the test class replace commented lines with your code. public class. Test Square public static void main (String[] args) // Create an instance of Square I. Print the area using area method // Print the instance using toString method

Answer 1

Square.java

public class Square
{
private double a;
//constructor
public Square(double a)
{
   this.a=a;
}
//calculate area
double area()
{
return a*a;
}
//print string representation of object
public String toString()
{
return "Side of square is "+a;
}
}

TestSquare.java

public class TestSquare
{
public static void main(String[] args)
{
    //create instance of Square class
    Square square=new Square(2.4);
    System.out.println("Area of square is "+square.area());//calls area method
    System.out.println(square); //calls toString()
}
}

Output

C:\Users\hp>java Testsquare Area of square is 5.76 Side of square is 2.4 C:\Users\hp?