20171116 - 05 - 03

package myApp;

import java.util.Scanner;

public class class05_03 {
    /*public final static int SIZE = 5;*/

    //isIn() method, accepts 2 args: 1st int, 2nd int array
    //if the method locates the number inside the array, return true, otherwise return false
    public static boolean isIn(int number, int arr[]) {
        for (int test: arr) {
            if (test == number) { return true; }
        }

        return false;
    }

    //newArr() method, accepts 2 args: 1st int array, 2nd int array
    public static int[] newArr(int arr1[], int arr2[]) {
        /*int newArr[] = new int[SIZE];*/

        int newArr[] = new int[arr1.length];
        int newIndex = 0;

        //loop through arr1
        for (int number1: arr1) {

            //for each iteration of arr1, loop through arr2
            for (int number2: arr2) {

                //compare systematically every item from arr1, with every item from arr2
                if (number1 == number2 && !(isIn(number1, newArr))) {

                    //if condition holds true,
                    //update new array with item, and raise new array's index count by 1

                    newArr[newIndex] = number1;
                    newIndex += 1;
                }
            }
        }

        return newArr;
    }

    public static void main(String[] args) {

        //init vars
        final int SIZE = 5;
        int[]   arr1 = new int[SIZE],
                arr2 = new int[SIZE],
                arr3;

        //open in_stream
        Scanner s = new Scanner(System.in);

        //populate array #1
        System.out.printf("Enter %d numbers: ", arr1.length);
        for (int i=0; i<arr1.length; i+=1) {
            arr1[i] = s.nextInt();
        }
        s.nextLine(); //eat 'Enter', disregard it

        //populate array #2
        System.out.printf("Enter %d numbers: ", arr2.length);
        for (int i=0; i<arr2.length; i+=1) {
            arr2[i] = s.nextInt();
        }
        s.nextLine();
        s.close(); //close in_stream

        //assemble array #3
        arr3 = newArr(arr1, arr2);

        //print array #3
        System.out.print("New array: ");
        for (int number: arr3) {
            System.out.printf("%d - ", number);
        }

    }

}