where to write function in java code example

Example 1: java methods

public class MyClass {
  static int myMethod(int x) {
    return 5 + x;
  }

  public static void main(String[] args) {
    System.out.println(myMethod(3));
  }
}
// Returns 8

Example 2: what is a method example in java

public int addNum(int num1, int num2) {
  total = num1 + num2;
  System.out.println("Total: " + total);
}