Encapsulation

Driver.java

public class Driver
{
    public static void main(String[] args)
    {
        Person person = new Person();
        person.setName("John Wick");
        person.setAge(30);
        
        System.out.println("Person name is: " + person.getName());
        System.out.println("Person age is: " + person.getAge());
    }
}

Person.java

public class Person
{
    private String name;
    private int age;
    
    public void setName(String name)
    {
        this.name = name;
    }
   
    public void setAge(int age)
    {
        this.age = age;
    }
    
    public String getName()
    {
        return this.name;
    }
    
    public int getAge()
    {
        return this.age;
    }
}