トラック Java基礎 - 修了証付きオンライン学習

Java基礎

Beginner

5.0

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Javaプログラミングの強固な基礎を築くために設計された、包括的で初心者に優しいトラックです。本トラックでは、Javaの基本、重要な概念、オブジェクト指向プログラミング、データ構造、Stream APIを取り上げ、厳選されたコンテンツと独自コンテンツを組み合わせて、論理的かつ実践的な学習体験を提供し…

148

Chapters

Learning hours

235

Assignments

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学習内容

Understand Java syntax, variables, data types, and control flow

Apply object-oriented programming principles including encapsulation, inheritance, and polymorphism

Implement functional programming concepts with functional interfaces and lambda expressions

Write and debug Java programs using loops, arrays, and strings

Work with core Java data structures and generics

Handle file I/O operations and manage exceptions effectively

Grasp the essentials of the Java Virtual Machine, methods, and exception handling

Perform data processing using Java's Stream API

Solve practical coding challenges using real-world Java applications

Learning track content

Challenge: Primitive Types

Mathematical Operations in Java

Mathematical Operations on char

If-Else Statement

Switch-Case Statement

New Task Structure

Challenge: Weekday Switch

Introduction to Loops

While-Loop

Do-While Loop

Challenge: Building a Server Retry Mechanism

For-Loop

Increment and Decrement

Infinite Loop

Challenge: Filtering Numbers in a Loop

What is Array?

Using Loops with Arrays

Index Out Of Bounds

Two-Dimentional Array

Iteration In Two-Dimensional Array

For-Each Loop

What Is String?

Basic Methods In String

Practical Applications of String Methods

Challenge: Filter Failure Messages

NullPointerException

StringBuilder

String Pool, Method Equals()

How Does the Compiler Works?

Data Transfer in Java

Final Keyword

Importing Libraries

What is a Method?

Method Declaration and Invocation

Return Types and the return Statement

Challenge: Basic Method Creation

Understanding Parameters and Arguments

Pass by Value in Java

Method Parameters: Varargs

Challenge: Parameter Manipulation

Method Overloading

Recursion in Methods

Challenge: Method Overloading

What Are Exceptions?

Types of Exceptions

The Exception Hierarchy

Using try-catch Blocks

Multiple Catch Blocks

The finally Block

Throwing Exceptions

Creating Custom Exceptions

Exception Propagation

Introduction

Absolute and Relative Paths

The File Class

Basic File Operations

Creating and Writing to a File

Reading a File

Handling Errors

What is Class?

Main Class and Method

Access Modifiers

Class Creation

Challenge: Get Information About the Object

Constructor

Challenge: Team Constructor

Method toString()

Challenge: Parrot Information Display

Complex Classes Usage

Challenge: Pet and Owner Relationship

Private Modifier

Challenge: Animal Information Display

Getter and Setter

Challenge: Updating User Information

What is OOP?

OOP Principles Inheritance

OOP Principles Polymorphism

OOP Principles Encapsulation

OOP Principles Abstraction

What is Interface?

Abstract Class vs Interface

Default Methods

Static Methods

Introduction to Data Structures

List and ArrayList in Java

Challenge: Library Management System

CRUD Operations in Java

Algorithmic Complexity

LinkedList in Java

Implementing LinkedList in Java

Challenge: Implementing size and delete Methods in LinkedList

Queue Data Structure in Java

Deque Data Structure in Java

Stack Data Structure in Java

Challenge: Implementing BrowserHistory

What is Map?

Working with HashMap in Java

Challenge: Store and Retrieve User Scores

Map with Other Data Structures

Architecture

Principles

What Is a Functional Interface?

Predicate: Data Filtering

Challenge: Filtering Corporate Email Addresses

Function: Data Transformation

Challenge: Income Tax Calculation

Comparable: Natural Ordering of Data

Comparator: Custom Comparison of Data

Challenge: Sorting Employees

Consumer: Processing Data

Supplier: Data Generation

Bi-versions of Functional Interfaces

Challenge: Filtering Users by Two Criteria

BinaryOperator: Combining Two Values

Transforming Elements with the map() Method

Filtering Elements with the filter() Method

Challenge: Factory Product Filtering

Working with Nested Structures with the flatMap() Method

Arranging Items in Order with the sorted() Method

Challenge: Selecting the Best Cars on the Production Line

Eliminating Duplicates with the distinct() Method

Challenge: Factory Quality Control

Restricting and Skipping Elements with the limit() and skip() Methods

Challenge: Finding the Top 3 Hardest-Working Employees

Intermediate Processing with the peek() Method

collect() Gathering Stream Elements into a Collection

Challenge: Build a Custom Collector for Category Counting

Collectors Utility Class for Stream API

Processing Elements with the forEach() Method

Handling Values with the Optional Class

Aggregating Elements with the reduce() Method

Challenge: Calculating Total Cost with Discounts and Tax

Calculating Stream Statistics with count(), max(), and min()

Retrieving Stream Summary Metrics with summaryStatistics() Method

Retrieving Elements from a Stream with findFirst() and findAny()

Challenge: Selecting Random Products Within a Category

Checking Stream Elements Against a Condition with allMatch()

Challenge: Ensuring Fast Delivery for Expensive Products

Real-World Examples of Using Stream API

Performance in Stream API

Exception Handling in Stream API

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