Separate Even and Odd

Lecture 71:-  Separate Even and Odd

To separate even and odd numbers from an ArrayList in Java, you can create two separate ArrayList instances, one for even numbers and another for odd numbers. Then, iterate through the original list, check if each element is even or odd, and add it to the respective new lists accordingly. Here's a step-by-step implementation:

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import java.util.ArrayList;

public class SeparateEvenAndOdd {
    public static void main(String[] args) {
        ArrayList<Integer> numbers = new ArrayList<>();
        numbers.add(12);
        numbers.add(7);
        numbers.add(8);
        numbers.add(5);
        numbers.add(18);
        numbers.add(6);
        numbers.add(10);

        // Separate even and odd numbers
        ArrayList<Integer> evenNumbers = new ArrayList<>();
        ArrayList<Integer> oddNumbers = new ArrayList<>();

        for (Integer num : numbers) {
            if (num % 2 == 0) {
                evenNumbers.add(num);
            } else {
                oddNumbers.add(num);
            }
        }

        // Print the separate lists
        System.out.println("Even numbers: " + evenNumbers);
        System.out.println("Odd numbers: " + oddNumbers);
    }
}

Output:

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Even numbers: [12, 8, 18, 6, 10]
Odd numbers: [7, 5]

In this example, we create an ArrayList called numbers containing various integers. Then, we create two new ArrayList instances: evenNumbers to store even numbers and oddNumbers to store odd numbers.

We iterate through the numbers list, and for each element, we use the modulo operator % to check if it is even or odd. If it's even (i.e., the remainder of num % 2 is 0), we add it to the evenNumbers list. Otherwise, we add it to the oddNumbers list.

Finally, we print the contents of both lists to see the separated even and odd numbers.

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