Thread: Java beginner - cant calculate median from an array of integers, please help

Hi, im trying to produce a program that calculates the mean,total and median of an array of 20 numbers entered in via a textfield. The total and mean calculations seem to work fine, but when i put in the calculation for the median everything goes wrong. I'm sure the code is right for calculating the median, but when its entered although it compiles it messes up the the calculations for the total and the mean and produces an incorrect answer itself. Here is the code:

import java.applet.Applet;
import java.awt.Graphics;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
 
public class whileloopq extends Applet implements ActionListener
{
	Label label;
	TextField input;
	int num;
	int index;
	int[] numArray = new int[20];
	int sum;
	int total;
	double avg;
	int median;
 
 
 
	public void init ()
	{
		label = new Label("Enter numbers");
		input = new TextField(5);
		add(label);
		add(input);
		input.addActionListener(this);
		index = 0;
	}
 
	public void actionPerformed (ActionEvent ev)
	{
        int num = Integer.parseInt(input.getText());
		numArray[index] = num;
		index++;
		if (index == 20)
		input.setEnabled(false);
			input.setText("");
	    sum = 0;
		for (int i = 0; i < numArray.length; i++)
		{
			sum += numArray[i];
		}
        total = sum;
        avg = total / index;
 
        Arrays.sort(numArray);
		int middle = ((numArray.length) / 2);
		if(numArray.length % 2 == 0){
		 int medianA = numArray[middle];
		 int medianB = numArray[middle+1];
		 median = (medianA + medianB) / 2;
		} else{
		 median = numArray[middle + 1];
		}
 
        repaint();
 
        System.out.println( Arrays.toString( numArray ) );
 
	}
 
 
 
	public void paint (Graphics graf)
	{
 
 
 
		graf.drawString("Total   = " + Integer.toString(total), 25, 85);
		graf.drawString("Average = " + Double.toString(avg), 25, 100);
		graf.drawString("Median = " + Integer.toString(median), 25, 115);
 
 
 
	}
}

It was suggested to me to add the line "System.out.println( Arrays.toString( numArray ) );" to see what was going on and it seems as though the odd numbers are removed from the array. I cant figure it out. Any help or guidance would be very much appreciated.

Thanks