Example:

import java.util.*;

public class EvenOddFunction {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int number;
        System.out.println("Input any number to check even or odd:");
        number = input.nextInt();
        evenMethod( number);
        oddMethod(number);
    }

    public static void evenMethod(int n) {
        if (n % 2 == 0){
            System.out.println("Your number " + n + " is even");
        }

    }

    public static void oddMethod(int n) {
        if (n % 2 != 0) {
            System.out.println("Your number " + n + " is odd");
        }
    }
}

Description : Number which is divisible by 2 is called even numbers and which is not divisible by 2 is called odd numbers. Here we have two separate functions for checking either number is even or odd. We are passing number as argument in methods.