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# Solution: Did you find the 'right' area?

class rightAngleTriangle {
    //Define the member variables, constructor and
    // relevant area method
    private double length;
    private double height;

    public rightAngleTriangle(int l, int h) {
        length = l;
        height = h;
    }

    public double area() {
        return (length * height / 2.0);
    }
}

class challenge_one {
    public static double test(rightAngleTriangle rt) {
        return rt.area();
    }
    public static void main( String args[] ) {
        rightAngleTriangle one= new rightAngleTriangle(3,5);
        System.out.println("Area of right Angle traingle:" + test(one));
    }
}
    


# Understanding the code
$$$$

* Lines 4-5: The two **int** type variables  `length` and `height` are created. Both variables are **private** to ensure they can only be accessed by **member** methods.

* Lines 7-9: The **overloaded constructor** is created. It takes as parameters, two **int** type variables. The **first** argument is assigned to the `length` and the **second** to the `height`.
The constructor is **public** so that objects of type *rightAngleTriangle* can be made from any other class. 

* Lines 12-14: This is the **method** for calculating the `area` of the triangle. Note that the method **does not** take in any parameters as it calculates the area using the *private members*. 
It calculates the area of the **right angle triangle** by the formula `0.5* (length * height)`.The **return type** for the method is `double` as it returns the **area** calculated. 


* Lines 18-20: This creates a `static` method which simply takes in as a parameter, the `rightAngleTriangle` object and returns the **answer** of the `area` method. 

   * The method was made `static` so it will belong to the whole class it is created in and not for every object of that class.

 


In this review, solution of the challenge 'Calculating the Area' from the previous lesson is provided.

Getting Started with Java!

Variables & User Input

Simple Maths & Logic

Strings and String Processing

Conditional Statements

Loops

Methods

Arrays

Classes and Inheritance

Generics

ArrayLists

Java Exam

Solution Review: Calculating the Area

Solution: Did you find the ‘right’ area?