gistfile1.txt

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;

public class Calculator {

	/**
	 * @param args
	 */
	public static void main(String[] args) {

		// declaring reference to array
		int anArray[]; 
		// Create array with 3 elements
		anArray = new int[3];

		// Display"Enter three numbers"
		System.out.println("Enter three numbers");
		
		// specify the reader variable
		BufferedReader reader;
		
		// to be a standard input buffer
		reader = new BufferedReader(new InputStreamReader(System.in));
		boolean done = false;
		int position = 0;
		
		//Placing Numbers written by user into array
		while (!done) {
			try {
				String value = reader.readLine();
				Integer i = Integer.valueOf(value);
				anArray[position] = i;
				position++;
				
				//Declaring after three integers imputed by user array is "true"
				if (position >= 3) {
					done = true;
					}
				
			//Creating an exception for if user imputes non integer	
			} catch (IOException ex) {
				ex.printStackTrace();
			} catch (NumberFormatException ex) {
				System.out.println("That wasn't a number, try again.");
			}
		}

		{
			//Equation Array position 0 + Array position 1 + Array position 2
			int a = anArray [0]+ anArray[1]+anArray[2];
			
			//System out Arrays
			System.out.println("The answer is " + a);
		}
		
		
	}

}