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Hi, this is my program on calculating an average. I tried to use classes properly, so please if their is some sort of mistake/things i can improve on, please point it out so i can get better

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PHP Code:

package developement;

import javax.swing.JOptionPane;



class Dev

{

    

    public Dev()

    {

        //making a object called objAverage

        Average objAverage = new Average();

        

        objAverage.Getammount();

        objAverage.Getnumbers();

        objAverage.Getaverage();        

    }





    public static void main(String[] args)

        

    {

        new Dev();

        System.exit(0);

    }



}



class Average

{

    //Variables    

    int ammount;

    int array[];

    int count;

    String currentnumber;

    int averageadd=0;

    int average;

    

    

    

    //constructor

    public Average()

    {

    }



    

    //method that gets the ammount of numbers

    public int Getammount()

    {

        //variables

        String inputammount;

        

        //get ammount

        inputammount =JOptionPane.showInputDialog(null,"Enter Ammount of numbers to average","Ammount of numbers", JOptionPane.QUESTION_MESSAGE);

        

        //convert string to integer

        ammount= Integer.parseInt(inputammount);

        return ammount;

        

    }



    //method which substracts two numbers

    public int Getnumbers()

    {

        array = new int [ammount]; 

        

        //get numbers

        for (count=0; count<ammount; ++count)

        {

        currentnumber = JOptionPane.showInputDialog("Enter Number:");

        array[count] = Integer.parseInt(currentnumber);

        averageadd=averageadd+array[count];

        }

        return averageadd;

    }

    

    public void Getaverage()

    {

        average= averageadd/ammount;

        String displayaverage;

        

        //convert to string

        displayaverage= Integer.toString(average);

        JOptionPane.showMessageDialog(null,"The average of those numbers is: "+displayaverage,"result", JOptionPane.PLAIN_MESSAGE);

        

    }

} 

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thanks!