Learn Java For Android App Development – A Complete Guide
Java is one of the powerful general-purpose programming languages, created in 1995 by Sun Microsystems (now owned by Oracle). Java is Object-Oriented. However, it is not considered as pure object-oriented as it provides support for primitive data types (like int, char, etc). Java syntax is similar to C/C++. But Java does not provide low-level programming functionalities like pointers. Also, Java code is always written in the form of classes and objects. Android heavily relies on the Java programming language all the SDKs required to build for android applications use the standard libraries of Java. If one is coming from a traditional programming background like C, C++, Java is easy to learn. So in this discussion, there is a complete guide to learn Java specifically considering Android App Development.
So in this article, we have covered the following things:
- Basics of Java
- Decision Making Statements in Java
- Type Conversion in Java
- Comments in Java
- Operators in Java
- Strings in Java
- Object-Oriented Programming Concepts in Java
- Exception Handling in Java
- Interfaces and Abstract Classes
- Essential collections in Java required for Android Development
- Complete Java Tutorial
Step-by-Step Guide to Learn Java for Android App Development
Basics of Java
Decision Making Statements in Java
- Decision Making in Java (if, if-else, switch, break, continue, jump) – A programming language uses control statements to control the flow of execution of a program based on certain conditions.
- Switch Statement in Java – The switch statement is a multi-way branch statement. It provides an easy way to dispatch execution to different parts of code based on the value of the expression.
- Loops in Java – Looping in programming languages is a feature that facilitates the execution of a set of instructions/functions repeatedly while some conditions are evaluated to be true.
- For-each loop in Java – For-each is another array traversing technique like for loop, while loop, do-while loop is introduced in Java5.
Type Conversion in Java
- Type conversion in Java with Examples – If the data types are compatible, then Java will perform the conversion automatically known as Automatic Type Conversion, and if not, then they need to be cast or converted explicitly.
Comments in Java
- Comments in Java – Comments take part in making the program become more human-readable by placing the details of code involved and proper use of comments makes maintenance easier and finding bugs easier.
Operators in Java
- Operators in Java – Java provides many types of operators which can be used according to the need. They are classified based on the functionality they provide.
Strings in Java
Object-Oriented Programming Concepts in Java
- Classes and Objects in Java – The basic OOPs components Class and Object in the java programming language.
- Different ways to create objects in Java – Get to know the various ways of creating objects in Java.
- Inheritance in Java – It is the mechanism in Java by which one class is allowed to inherit the features(fields and methods) of another class.
- Encapsulation in Java – Encapsulation is defined as the wrapping up of data under a single unit.
- Abstraction in Java – Data Abstraction is a property by virtue of which only the essential details are displayed to the user.
- Access Modifiers in Java – As the name suggests, access modifiers in Java help to restrict the scope of a class, constructor, variable, method, or data member.
- ‘this’ reference in Java – ‘this’ is a reference variable that refers to the current object.
- Overloading in Java – Overloading allows different methods to have the same name, but different signatures of methods.
- Overriding in Java – Overriding is a feature that allows a subclass or child class to provide a specific implementation of a method that is already provided by one of its super-classes or parent classes.
- Object class in Java – Object class is present in the java.lang package. Every class in Java is directly or indirectly derived from the Object class.
- Static class in Java – Some classes can be made static in Java. Java supports Static Instance Variables, Static Methods, Static Block, and Static Classes.
Exception Handling in Java
Interfaces and Abstract Classes
Essential collections in Java required for Android Development
- ArrayList in Java – ArrayList is a part of the collection framework and is present in the java.util package. It provides us with dynamic arrays in Java.
- HashMap in Java with Examples – It stores the data in (Key, Value) pairs, and you can access it via an index of another type.
- Java Naming Conventions – Naming conventions must be followed while developing software in Java for good maintenance and readability of code.
- Generics in Java – Generics mean parameterized types. The idea is to allow types ( Ingers, strings, … etc, and user-defined types) to be a parameter for methods, classes, and interfaces.
- Annotations in Java – Annotations are used to provide supplemental information about a program.
- Lambda Expressions in Java 8 – Lambda expressions basically express instances of functional interfaces (An interface with a single abstract method is called a functional interface.
For a complete Java Tutorial, you may refer to this article: Java Programming Language
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