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Functions of Java Programming

Java is an Object-Oriented Programming (OOP) language which is based on creating blueprints (classes) for data and objects. Classes are blueprints that allow us to structure a program based on properties, methods, attributes, and fields. Java applications are compiled into bytecode that may be executed by a JVM.

Java based applications can run on any Operating System (OS), or environment due to is its runtime environment using JVM. Moreover, there are several key features of Java such as the following:

FeaturesDescription
1. Object OrientedA programming paradigm that focuses on the concepts of object - an idea where data is structured in classes, fields, properties, code, and methods.
2. Multi-threadedThis is an act of executing complex processes in a series of virtual processes in threads independent of each other. It simply means that we can run two tasks synchronously and asychronously in a program.
3. InterpretedJava is considered both interpreted and compiled language. The source class file is first converted into binary byte code, then that byte code runs on the JVM. This allows the compiled byte code inside JVM to be fast and efficient.
4. AbstractionJava allows to hide complexities of processes and data through Process Abstraction and Data Abstraction
5. PolymorphismClasses can "morph" into different methods and implementations through interfaces and class instances.
6. InheritanceWe can extend classes in Java and ensure that its functionality is inherited by its subclasses.
7. EncapsulationHiding or exposing data properties through access modifiers such as private, public, and protected
8. Platform independentJava programs can run on different machines and operating systems with the help of its JVM.
9. Garbage collectionDeleting code that is no longer useful to free up memory space.
10. SecureJava has a solid foundation in security due to its core features. There are security APIs which developers can use to add more security features to their applications.
11. DistributedUsers are allowed to create distributed applications.
12. ClassesThese serve as blueprints to create objects. Objects are instances of classes.
13. Sandbox executionAllows code to run in an isolated environment, minimizing security risks and potential system failures.
14. ReferencesPointers to memory. When an object is created from a class Java allocates a space for it in memory.
15. LambdaThis is an expression to write a short block of code which takes in parameters and returns a value.
16. ArchitectureA good example of this is Model-View-Controller Architecture (MVC).

Practice and Skill Development

Just like any other technical skill, Java requires patience, perseverance, and daily practice. It is very hard, confusing, and when something goes wrong this language will throw in a gazillion errors in your terminal. And so, an engineer must be patient with this because this language is an art.

Writing a simple class:

public class GenerateAES {

    // Class member
    private int bits;

    // Constructor 
    public GenerateAES(int bits) { ... }

    // Method
    long createStoredEncryption(int bits) {
        // returns a long encrypted key
    }
}

Writing a Main class:

public class Main {

    private int bits = 256;

    // An instanceof GenerateAES
    private GenerateAES generateAES = new GenerateAES(bits);

    public static void main(String[] args) {
        // Code runs here
    }

}

Logic and Problem Solving

Java is a versatile language. Its elegant way of integrating real world concepts such as blueprints and objects have helped in creating efficient solutions. We can design classes that contain properties, data, methods, and code to enact procedures and algorithms which can produce output to satisfy the needs of the user.