i do not understand lesson

Question about the task

Under discussion

package com.codegym.task.task04.task0401;

/*
This age doesn't work for me…

*/
public class Solution {
    public static void main(String[] args) {

        Person person = new Person();
        System.out.println("Age: " + person.age);
        person.adjustAge(person.age);
        System.out.println("Adjusted age: " + person.age);
    }

    public static class Person {
        public int age = 20;

        public void adjustAge(int age) {
            age = age + 20;
            System.out.println("The age in adjustAge() is " + age);
        }
    }
}

Think about what the program is doing.
Fix the programming error so that person.age changes value.

Hint:
carefully review the adjustAge method.

Requirements:

The program should display text on the screen.
The Person class should have a public int field called age.
The Person class's adjustAge method should display text on the screen.
The Person class's adjustAge method must have only one int parameter named age, and the method must be void.
The main method should call the adjustAge method only once.
The Person class's adjustAge method should increase the Person's age by 20.

package com.codegym.task.task04.task0401; /* This age doesn't work for me… */ public class Solution { public static void main(String[] args) { Person person = new Person(); System.out.println("Age: " + person.age); person.adjustAge(person.age); System.out.println("Adjusted age: " + person.age); } public static class Person { public int age = 20; public void adjustAge(int age) { age = age + 20; System.out.println("The age in adjustAge() is " + age); } } }

Comments (4)

Popular
New
Old

You must be signed in to leave a comment

Vicks

Level 4 , Mumbai, India

25 October 2019, 08:33

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

AndraxDev

Level 14

8 May 2019, 19:38

and add

this.age = age + 20;

before.

Guadalupe Gagnon

Level 37 , Tampa, United States

8 April 2019, 15:56

Add this line inside the adjustAge() method after line 20:

System.out.println("Inside adjustAge() - class variable age is " + this.age);

In IntelliJ notice how this.'age' is a different color than 'age'. This helps you to see if you are referring to a local variable or a class member variable. You should be able to solve the problem with this hint.

Denise

Level 14 , Delft, Netherlands

8 April 2019, 12:31

There are 2 variables with the same name 'age': the class variable and the local variable in the adjustAge method. You want to update the class variable, but instead you are now updating the local variable in the method. Try 'this.age' to refer to the class variable age.