public class Solution { public static void main(String[] args) { Person person = new Person(); System.out.println("Age is: " + person.age); person.adjustAge(person.age); System.out.println("Adjusted age is: " + person.age); } public static class Person { public int age = 20; public void adjustAge(int age) { age = this.age + 20; System.out.println("Age in adjustAge() is: " + age); } } }