Practice›Java Fundamentals›Module 4. Classes & Objects›4.4 Encapsulation

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4.4 Encapsulation — validating setter

Total: 0 / 4 pts

Practice mode — check each part and get hints as you go.

Task

Fill in setAge so that it stores the value only if it is 0 or more; a negative value is ignored and the field keeps its old value.

main tries -5 first, then 20, so the program prints 0 and then 20. This is why fields are private: the setter guards them.

Your solution

class Person {
    private int age;

    int getAge() {
        return age;
    }

    // Write setAge(int age) that stores the value only if it is 0 or more.
    void setAge(int age) {

    }

}

public class Main {

    public static void main(String[] args) {
        Person p = new Person();
        p.setAge(-5);
        System.out.println(p.getAge());
        p.setAge(20);
        System.out.println(p.getAge());
    }
}

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