Java Tutorial for beginners

Welcome to Java Tutorial by Android Example!

In this Java Tutorial, we shall start with learning the basic and core concepts of Java. We shall also learn how to program and build applications using Java.

In this Java tutorial for beginners, we are going to learn about java evolution, development of Java language, java features, Java frameworks, and Java support systems. Java tutorial covers various development tools, classes in Java programming, and Java methods which comprises the Java environment. This tutorial on Java will help you get a quick insight into the Java programming language and thus, help you learn java language.

About

Java is a widely used programming language in developing software. This Java Tutorial is aimed to help beginners to get started with Java Programming language.

Java Programming Language is one of the most popular languages among developers. Most of the production servers, regular desktops, workstations, smartphones etc., are powered by Java.

Java Tutorials Index

The following is a complete list of tutorials that we cover in this series of Java Tutorials.

Get Started

These Java tutorials help you understand what Java is, how to install Java on your personal computer, and how to start programming in Java using an Integrated Development Environment.

• What is Java
• Install Java
• List of IDEs for Java programming
• HelloWorld Java Example Program

Basics

Following tutorials deal with the basic building blocks of Java programs, like how to write looping statements, decision-making statements; how to declare variables and how to understand their scope; what type of data can be stored in a variable.

Structure of a Java Program

• Java – Data Types
• Java – Variable Types
• Java – Access Modifiers in Java

Operators

• Java – Arithmetic Operators
• Java – Relational Operators

Decision Making Statements

• Java – Decision Making
• Java If Else
• Java Switch Case

Looping Statements

• Java – Loops
• Java For Loop
• Java While Loop
• Java forEach

Type Conversions

• Java – String to Int
• Console Operations
• Java – Read Integer from Console

Exception Handling

• Call Stack
• Try Catch Block

Object Oriented Concepts

• Classes and Objects
• Inheritance in Java
• Polymorphism in Java
• Java Method Overriding
• Java Method Overloading
• Java Final Keyword
• Abstraction in Java
• Encapsulation in Java
• Interfaces in Java

Strings

Strings and different operations on the Strings is usually the most used by Java programmers for developing software.

Java String Tutorial

• java.lang.String class Constructors and Methods

Arrays

Array is a collection of elements.

Elements in an array are ordered. Therefore, we can access the elements of an array using index.

Array has a fixed length. Once an array is initialized with a specific size, we cannot alter the size of it.

The following tutorials help us understand what an Array is, and how to work with arrays in programs.

• Java Array
• Java Array – Initialize
• Java Array – Print
• Java Array of Integers
• Java Array of Strings
• Java Array of Objects
• Java Array of Arrays
• Java Array – Iterate over Elements
• Java Array – For Loop
• Java Array – While Loop
• Java Array – ForEach
• Java Array – Append Element(s)
• Java Array – Check if Empty
• Java Array – Average
• Java Array – Check if Array contains Element
• Java Array – Find Index of Item in Array
• Java Array – Sum
• Java Array – Concatenate
• Java Array – Find Smallest Number
• Java Array – Find Largest Number
• Java Array – Reverse

File Operations

Java provides an inbuilt library to handle file operations like reading a file; writing to a file; appending data to an existing file; or deleting a file. Following example help you with the execution of file operations programmatically using Java.

• Read contents of a File line by line using BufferedReader
• Read contents of a File line by line using Stream in Java 8
• Filter list of files or directories in a folder using Java
• Java Copy File
• Java Delete File
• Java Rename File
• Java – Download File from URL
• Java – Replace a String in File

ArrayList Operations

ArrayList is a Class in Java that is used as a Collection. Following tutorials help you deal some of the operations that can be performed on ArrayLists.

• Print all elements of an ArrayList in Java
• Insert an Element at a specific position in ArrayList in Java
• Delete Nth element of an ArrayList in Java
• Convert String Array to ArrayList in Java

Date and Time

Access Date and Time in Java using java.util.Date()

Design Patterns

Singleton Class

Exceptions

• ArithmeticException
• ArrayIndexOutOfBoundsException
• ArrayStoreException
• NullPointerException
• NumberFormatException
• StringIndexOutOfBoundsException

Java StringBuilder

• Java StringBuilder – append()
• Java StringBuilder – appendCodePoint()
• Java StringBuilder – capacity()
• Java StringBuilder – charAt()
• Java StringBuilder – chars()
• Java StringBuilder – codePointAt()
• Java StringBuilder – codePointBefore()
• Java StringBuilder – codePointCount()
• Java StringBuilder – codePoints()
• Java StringBuilder – delete()
• Java StringBuilder – deleteCharAt()
• Java StringBuilder – ensureCapacity()
• Java StringBuilder – getChars()
• Java StringBuilder – indexOf()
• Java StringBuilder – insert()
• Java StringBuilder – lastIndexOf()
• Java StringBuilder – length()
• Java StringBuilder – offsetByCodePoints()
• Java StringBuilder – replace()
• Java StringBuilder – reverse()
• Java StringBuilder – setCharAt()
• Java StringBuilder – setLength()
• Java StringBuilder – subSequence()
• Java StringBuilder – substring()
• Java StringBuilder – toString()
• Java StringBuilder – trimToSize()

Java ArrayList

• Java ArrayList
• Java ArrayList – add()
• Java ArrayList – addAll()
• Java ArrayList – clear()
• Java ArrayList – clone()
• Java ArrayList – contains()
• Java ArrayList – ensureCapacity()
• Java ArrayList – forEach()
• Java ArrayList – get()
• Java ArrayList – indexOf()
• Java ArrayList – isEmpty()
• Java ArrayList – iterator()
• Java ArrayList – lastIndexOf()
• Java ArrayList – listIterator()
• Java ArrayList – remove()
• Java ArrayList – removeAll()
• Java ArrayList – removeIf()
• Java ArrayList – removeRange()
• Java ArrayList – retainAll()
• Java ArrayList – set()
• Java ArrayList – size()
• Java ArrayList – spliterator()
• Java ArrayList – subList()
• Java ArrayList – toArray()
• Java ArrayList – trimToSize()

Java HashMap

• Java HashMap – clear()
• Java HashMap – clone()
• Java HashMap – compute()
• Java HashMap – computeIfAbsent()
• Java HashMap – computeIfPresent()
• Java HashMap – containsKey()
• Java HashMap – containsValue()
• Java HashMap – entrySet()
• Java HashMap – get()
• Java HashMap – isEmpty()
• Java HashMap – keySet()
• Java HashMap – merge()
• Java HashMap – put()
• Java HashMap – putAll()
• Java HashMap – remove()
• Java HashMap – size()
• Java HashMap – values()

Java HashSet

• Java HashSet – add()
• Java HashSet – clear()
• Java HashSet – clone()
• Java HashSet – contains()
• Java HashSet – isEmpty()
• Java HashSet – iterator()
• Java HashSet – remove()
• Java HashSet – size()
• Java HashSet – spliterator()

Other Example Programs

• Sorting Algorithms
• Useful Resources
• Java Interview Questions

Conclusion

We have gone through the basics of Java Programming, Object Oriented Programming concepts with Java, and some of the useful classes and their methods in Java.