import java.util.ArrayList;
import java.util.Random;
import java.util.Scanner;
import javax.swing.JOptionPane;


/**
 *
 * @author Bill Kraynek
 *
 * COP3337 Example
 */
public class ArrayListMaxExample {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        ArrayList<Integer> numbers = new ArrayList<>();
        Random random = new Random();
        for( int i = 0; i < 10; i++ ) {
            numbers.add(random.nextInt(20));
        }// end for
        while ( true ) {
            String input = JOptionPane.showInputDialog("Enter a number. Click cancel to quit");
            if ( input == null ) return;
            int number = new Scanner(input).nextInt();
            int numberIndex = indexOf(number,numbers);
            if( numberIndex != -1 ) {
                JOptionPane.showMessageDialog(null,number + " found in array");
            } else {
                JOptionPane.showMessageDialog(null,number + " not found in array");
            } // end if
        } 
    }
    
    static int indexOf(int number, ArrayList<Integer> array) {
        for( int i = 0; i < array.size(); i++ ) {
            if( number == array.get(i) ) return i;
        } // end for
        return -1;
    }

}