Зміст курсу

Java Extended

1. Deep Java Structure

How does the compiler works?Data transfer in Java Final Keyword Importing Libraries Using Libraries In Our Code Ternary Operator Enhanced Switch Statement

2. Methods

What is a Method?Creating Our Own Methods Challenge: Names Starting with Letter B Void Methods Practice Method Overloading Recursion Sorting Even Numbers Challenge

3. String Advanced

Deeper into String Method split()Uppercase Even Words Challenge indexOf() method Character Indices Sum Challenge trim() Method Substring First and Last Characters Challenge

4. Classes

What is class?Main Class and Method Access modifiers Class Creation Cat Meowing Challenge Constructor Team Constructor Challenge Method toString()Parrot Information Display Challenge

5. Classes Advanced

Complex Classes Usage Pet and Owner Relationship Challenge Private Modifier Animal Information Display Challenge Getter and Setter Country Information Management Challenge Summary

Class Creation

Class Syntax

The syntax for creating a class is quite simple. Let's take a look at an example with the class Person:

Person


              123
            
class Person {

}

This is all it takes to create a class. However, it will be useless to us if it's empty. Therefore, we should add fields to it. Let's assume that our person has a name, gender, and age:

Person


              12345
            
class Person {
    String name;
    String gender;
    int age;
}

And now, let's write a method that allows our Person to report their name and age:

Person


              123456789
            
class Person {
    String name;
    String gender;
    int age;
    
    void introduce() {
        System.out.println("Hi, my name is " + name + " and I am " + age + " years old!");
    }
}

Завдання

Great! Now your task is to create two objects of the Person class in the main method. One will be named Bob and will be 30 years old, and the other will be named Alice and will be 27 years old. Then, use the introduce() method on each person to have them introduce themselves.

Завдання

Все було зрозуміло?

Секція 4. Розділ 4

Class Creation

Class Syntax

The syntax for creating a class is quite simple. Let's take a look at an example with the class Person:

Person


              123
            
class Person {

}

This is all it takes to create a class. However, it will be useless to us if it's empty. Therefore, we should add fields to it. Let's assume that our person has a name, gender, and age:

Person


              12345
            
class Person {
    String name;
    String gender;
    int age;
}

And now, let's write a method that allows our Person to report their name and age:

Person


              123456789
            
class Person {
    String name;
    String gender;
    int age;
    
    void introduce() {
        System.out.println("Hi, my name is " + name + " and I am " + age + " years old!");
    }
}

Завдання

Все було зрозуміло?

Секція 4. Розділ 4

Class Creation

Class Syntax

The syntax for creating a class is quite simple. Let's take a look at an example with the class Person:

Person


              123
            
class Person {

}

This is all it takes to create a class. However, it will be useless to us if it's empty. Therefore, we should add fields to it. Let's assume that our person has a name, gender, and age:

Person


              12345
            
class Person {
    String name;
    String gender;
    int age;
}

And now, let's write a method that allows our Person to report their name and age:

Person


              123456789
            
class Person {
    String name;
    String gender;
    int age;
    
    void introduce() {
        System.out.println("Hi, my name is " + name + " and I am " + age + " years old!");
    }
}

Завдання

Все було зрозуміло?

Class Syntax

The syntax for creating a class is quite simple. Let's take a look at an example with the class Person:

Person


              123
            
class Person {

}

This is all it takes to create a class. However, it will be useless to us if it's empty. Therefore, we should add fields to it. Let's assume that our person has a name, gender, and age:

Person


              12345
            
class Person {
    String name;
    String gender;
    int age;
}

And now, let's write a method that allows our Person to report their name and age:

Person


              123456789
            
class Person {
    String name;
    String gender;
    int age;
    
    void introduce() {
        System.out.println("Hi, my name is " + name + " and I am " + age + " years old!");
    }
}

Завдання

Секція 4. Розділ 4

Перейдіть на комп'ютер для реальної практикиПродовжуйте з того місця, де ви зупинились, використовуючи один з наведених нижче варіантів