Encapsulation example. Need to make the age variable private so no one can directly change it, and the setAge() method is checking for a valid age.
public class EncapsulationExample {
// variables
private int age;
// default constructor
public EncapsulationExample() {
}
// encapsulation
public void setAge (int newAge) {
if (newAge < 0) {
System.out.println("Invalid age");
} else {
age = newAge;
}
}
}