Java Class Library from Coursera

Java Class Library is the fourth and final course in the Core Java Specialization. The Core Java Specialization is part of a series of programming specializations, derived from LearnQuest's private Java Bootcamps, designed to provide the skill set necessary to be hired as an IT developer using Java in many corporate environments.

After completing this course, you will be able to write reusable code that remains type-safe using Java Generics, work with collections of objects, work with files, handle runtime errors, and generally be prepared to move on to learning to use Java frameworks such as Spring Boot and Jakarta EE.

There are over 4200 classes in the Java 8 class library, with 100s of new ones compared to prior versions of Java. In this course, we will cover additional language features that enable the class library, essential library areas, and provide roadmaps to areas for self-exploration.

To be successful in this course, you should have taken:

- Course 1: Introduction to Java

- Course 2: Introduction to Object-Oriented Programming with Java

- Course 3: Object-Oriented Hierarchies in Java

or have equivalent knowledge.

What's inside

Syllabus

Course Overview

This module provides an overview of the Core Java - Java Class Library course. There are over 4200 classes in the Java 8 class library, with hundreds of new ones compared to prior versions of Java. In this course, we will cover additional language features that enable the class library, essential library areas, and provide roadmaps to areas for self-exploration.

Java Generics

In this module, we will learn about a major Java feature, Generics (known as template or parameterized types in some other languages), introduced in Java 5. Generics are a key tool in ensuring type safety.

Java Collections

In this module, we'll talk about the Java Collection classes, which were introduced in Java 5 and have been expanded upon in Java 8 with the introduction of Java Streams (java.util.stream) technology. Collections give us much more power and capability for managing collections of data than the simple, linear, arrays we have used up to this point in the curricula.

Exception Handling

Different programming models handle error conditions in different ways. Some, for example, require programmers to check error codes after every function call. Java, learning from other environments such as C++, takes a different approach known as exception handling. In this module, you will learn how Java deals with exceptions, and learn to both handle and -- when necessary -- create exceptions.

Input and Output

Java has rich Input and Output (I/O) capabilities, which have evolved constantly over the years. Java can handle network I/O, file I/O; blocking and non-blocking I/O and more. In this module we will look at an overview of I/O, and focus mostly on simple text I/O using files. We will also take a brief look at the extensive improvements made to I/O in Java 7 and Java 8, with readings to provide additional information.

Enums

Java Enums provide us with the ability to create a fixed set of constant values. They are objects, so they can have methods and properties, but they are a fixed, constant, set, nonetheless. The simplest ones might merely be something like the suits of a deck of cards, but we'll take a more complete look at their capabilities, and how you might use them.

Annotations

Annotations are a way of attaching meta-data to Java code. Added in Java 5, this passive meta-data facility might not seem important at first, but is the key to how modern Java frameworks work. Spring, Spring Boot, Spring Cloud, NetFlix OSS, Java Persistence Architecture, Jakarta EE (née Java EE) containers, JAX-WS, JAX-RS, and so many others. In this module, we will look at the Java Annotations technology, look at existing annotations, and -- in the lab -- create a custom annotation, and write code to see that annotation at run-time. This means that you will not only have the ability to use annotations, but also have at least the rudiments necessary to write and process your own annotations, such you have the need.

Good to know

Know what's good

, what to watch for

, and possible dealbreakers

Excellent for novice Java programmers seeking to increase their foundational knowledge

Teaches type safety through Java Generics, essential for ensuring code robustness

Provides a strong foundation for handling errors and exceptions, a vital skill in programming

Covers Input and Output capabilities, enabling learners to work with files and network I/O

Introduces Enums and Annotations, important concepts for modern Java frameworks

Reviews summary

Java programming foundation

Learners say that this Java course is a great resource that's well-structured and engaging. Many mention topics like Generics and Streams as concepts that are taught well and easy to understand. They also describe hands-on exercises as being effective and the lectures as clear.

Well-structured and engaging

"Best organized Java course I've seen."

"The course is well-structured and engaging."

"Clear and concise explanations."

Effective hands-on exercises

"Lots of hands-on exercises that really helped me understand the concepts."

"The hands-on exercises were very helpful in reinforcing the material."

"The exercises were challenging but fair."

Clear and concise explanations

"The instructor is very clear and concise in his explanations."

"The instructor's pacing is perfect."

"The instructor is very knowledgeable and passionate about the subject."

Difficult concepts made easy to understand

"This course surprisingly well explains some difficult concepts of Java language like Generics, Collections and Streams."

"These sections truly allowed to reimagine my view on them."

"I understood many of these topics already but I got much more a detailed comprehension."

Activities

Be better prepared before your course. Deepen your understanding during and after it. Supplement your coursework and achieve mastery of the topics covered in Java Class Library with these activities:

Review object-oriented programming concepts

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Refresh your knowledge of object-oriented programming principles to strengthen your foundation for this course, ensuring a smoother learning experience.

Browse courses on Object-Oriented Programming

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Review notes or textbooks on OOP concepts
Go through online tutorials or videos on OOP
Solve simple coding exercises related to OOP
Discuss OOP with peers or mentors to clarify understanding
Complete a practice project that incorporates OOP principles

Follow tutorials on Java Exception Handling

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Deepen your understanding of Java Exception Handling by following comprehensive tutorials, enhancing your ability to manage runtime errors effectively.

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Identify tutorials or courses on Java Exception Handling
Choose a tutorial or course
Follow the tutorial's instructions and complete the exercises
Create your own code examples to practice Exception Handling
Discuss Exception Handling concepts with peers or mentors

Solve LeetCode problems on Generics

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Practice applying Generics concepts through LeetCode problems to solidify your understanding.

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Choose a LeetCode problem related to Generics
Read the problem statement and constraints
Code the solution using Java Generics
Test and debug your solution
Review the solution and identify areas for improvement

Four other activities

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Participate in a study group for Java Class Library

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Join a study group to engage with peers, discuss course content, and enhance your understanding of the Java Class Library through collaborative learning.

Browse courses on Java Class Library

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Find or create a study group for Java Class Library
Attend regular study sessions and participate actively
Discuss course topics, assignments, and projects
Work together on practice problems and exercises
Provide support and encouragement to fellow group members

Practice Java Collections exercises

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Enhance your Java Collections skills through targeted exercises, improving your ability to work with data structures effectively.

Browse courses on Java Collections

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Find exercises or coding challenges related to Java Collections
Select an exercise or challenge
Implement the solution using Java Collections
Test and analyze the performance of your solution
Compare your solution with others or explore alternative approaches

Develop a Java Enums cheat sheet

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Solidify your understanding of Java Enums by creating a comprehensive cheat sheet, providing you with a quick reference for their usage and capabilities.

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Gather information and resources on Java Enums
Create an outline for your cheat sheet
Write down the syntax, usage, and examples of Java Enums
Include additional notes or explanations for clarity
Review and refine your cheat sheet

Create a presentation on Java Annotations

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Enhance your understanding of Java Annotations by creating a presentation, enabling you to effectively communicate their purpose and applications.

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Research the concepts and usage of Java Annotations
Develop an outline and structure for your presentation
Create slides that cover the main aspects of Java Annotations
Include examples and demonstrations to illustrate their functionality
Practice delivering your presentation and seek feedback

Career center

Learners who complete Java Class Library will develop knowledge and skills that may be useful to these careers:

Java Developer

A Java Developer creates and maintains enterprise Java software applications. They also provide technical support to internal and external customers. To succeed as a Java Developer, you should take Java Class Library. This course will teach you the necessary skills to write reusable code and work with collections of objects. You will also learn how to handle runtime errors and generally be prepared to move on to learning to use Java frameworks.

See salaries and explore the career path for Java Developer

Software Engineer

A Software Engineer designs, develops, and maintains software systems. They also work with other engineers to create and implement new features. To succeed as a Software Engineer, you should take Java Class Library. This course will teach you the necessary skills to write reusable code and work with collections of objects. You will also learn how to handle runtime errors.

See salaries and explore the career path for Software Engineer

Systems Analyst

A Systems Analyst studies the needs of an organization and designs and implements systems to meet those needs. They also work with users to ensure that the systems meet their requirements. To succeed as a Systems Analyst, you should take Java Class Library. This course will teach you the necessary skills to write reusable code and work with collections of objects. You will also learn how to handle runtime errors.

See salaries and explore the career path for Systems Analyst

Web Developer

A Web Developer designs and develops websites. They also work with other developers to create and implement new features. To succeed as a Web Developer, you should take Java Class Library. This course will teach you the necessary skills to write reusable code and work with collections of objects. You will also learn how to handle runtime errors.

See salaries and explore the career path for Web Developer

Technical Consultant

A Technical Consultant provides technical advice and support to clients. They also help clients to solve problems and improve their systems. To succeed as a Technical Consultant, you should take Java Class Library. This course will teach you the necessary skills to write reusable code and work with collections of objects. You will also learn how to handle runtime errors.

See salaries and explore the career path for Technical Consultant

Database Administrator

A Database Administrator manages and maintains databases. They also work with users to ensure that the databases meet their needs. To succeed as a Database Administrator, you should take Java Class Library. This course will teach you the necessary skills to write reusable code and work with collections of objects. You will also learn how to handle runtime errors.

See salaries and explore the career path for Database Administrator

Project Manager

A Project Manager plans, executes, and closes projects. They also work with stakeholders to ensure that projects are completed on time and within budget. To succeed as a Project Manager, you should take Java Class Library. This course will teach you the necessary skills to write reusable code and work with collections of objects. You will also learn how to handle runtime errors.

See salaries and explore the career path for Project Manager

Quality Assurance Analyst

A Quality Assurance Analyst tests software to ensure that it meets requirements. They also work with developers to identify and fix defects. To succeed as a Quality Assurance Analyst, you should take Java Class Library. This course will teach you the necessary skills to write reusable code and work with collections of objects. You will also learn how to handle runtime errors.

See salaries and explore the career path for Quality Assurance Analyst

Business Analyst

A Business Analyst studies the needs of an organization and designs and implements solutions to meet those needs. They also work with stakeholders to ensure that solutions meet their requirements. To succeed as a Business Analyst, you should take Java Class Library. This course will teach you the necessary skills to write reusable code and work with collections of objects. You will also learn how to handle runtime errors.

See salaries and explore the career path for Business Analyst

Information Technology Consultant

An Information Technology Consultant provides technical advice and support to clients. They also help clients to solve problems and improve their systems. To succeed as an Information Technology Consultant, you should take Java Class Library. This course will teach you the necessary skills to write reusable code and work with collections of objects. You will also learn how to handle runtime errors.

See salaries and explore the career path for Information Technology Consultant

Data Analyst

A Data Analyst collects, analyzes, and interprets data to identify trends and patterns. They also work with stakeholders to present their findings and recommendations. To succeed as a Data Analyst, you should take Java Class Library. This course will teach you the necessary skills to write reusable code and work with collections of objects. You will also learn how to handle runtime errors.

See salaries and explore the career path for Data Analyst

Network Administrator

A Network Administrator manages and maintains computer networks. They also work with users to ensure that the networks meet their needs. To succeed as a Network Administrator, you should take Java Class Library. This course will teach you the necessary skills to write reusable code and work with collections of objects. You will also learn how to handle runtime errors.

See salaries and explore the career path for Network Administrator

Information Security Analyst

An Information Security Analyst protects an organization's computer systems and networks from unauthorized access, use, disclosure, disruption, modification, or destruction. To succeed as an Information Security Analyst, you should take Java Class Library. This course will teach you the necessary skills to write reusable code and work with collections of objects. You will also learn how to handle runtime errors.

See salaries and explore the career path for Information Security Analyst

Computer Programmer

A Computer Programmer writes, tests, and maintains computer programs. They also work with other programmers to develop and implement new features. To succeed as a Computer Programmer, you should take Java Class Library. This course will teach you the necessary skills to write reusable code and work with collections of objects. You will also learn how to handle runtime errors.

See salaries and explore the career path for Computer Programmer

Computer Systems Analyst

A Computer Systems Analyst studies the needs of an organization and designs and implements systems to meet those needs. They also work with users to ensure that the systems meet their requirements. To succeed as a Computer Systems Analyst, you should take Java Class Library. This course will teach you the necessary skills to write reusable code and work with collections of objects. You will also learn how to handle runtime errors.

See salaries and explore the career path for Computer Systems Analyst