Features of Java
Java provides some special features which make it better for learning Java language before you learn any other Object-Oriented Programming Language. So, let us see all the features provided by java and the reason behind the mass usage of it. The following are the features of Java:
Java is very easy to learn, and its syntax is simple, clean, and easy to understand and is a simple programming language because:
- The syntax of Java is similar to the syntax of C++ (so easier for programmers to switch from learning experience from C++).
- No need to worry about unreferenced objects because there is an Automatic Garbage Collection in Java.
- Java updates by their huge community and has removed many complicated and rarely-used features, for example, explicit pointers, operator overloading, etc.
Java is an object-oriented programming language. Everything in Java is an object.
But why Java is not 100% Object-Oriented Programming Language?
Although it not 100% Object Oriented Programming Language as it uses predefined data types like int, float, etc.
What Is Object-Oriented Programming(OOPs)?
Object-oriented programming (OOPs) is a methodology that simplifies software development and maintenance of the code by providing some rules which we will cover later in this tutorial.
Basic concepts of OOPs are:
Java is a platform-independent programming language because as it doesn’t compile into platform-specific machines while Java is a write once, run anywhere (WORA) language. Basically , there are two types of platforms: Software and Hardware-based , in which Java provides a software-based platform.
Java provides a different type of agility as it is a software-based platform that runs on the top of other hardware-based platforms.
Once Java code is compiled by the compiler and converted into bytecode, it is ready to be run on any platform as this bytecode is a platform-independent code and needs JVM to be executed which can be easily installed on any platform like MacOS, Windows, Solaris, Linux, etc.
Java is a dynamic language. It supports dynamic loading of classes. It means classes are loaded on demand.
Java is robust(strong) because:
- A strong memory management system is used in Java.
- It doesn’t use pointers hence it is devoid of security problems.
- There are exception handling and the type checking mechanism in Java. All these points make Java robust.
Now if you have used C programming earlier, then you might have been kept confused about int data type, as it occupies 2 bytes of memory for 32-bit architecture and 4 bytes of memory for 64-bit architecture
However, it occupies 4 bytes of memory for both 32 and 64-bit architectures in Java. Hence, Java is an Architectural neutral programming language.
Java is best known for its security features and is secured because:
- No explicit pointer is used as it will make the program vulnerable to some threats which can easily reconstruct the code or destroy it.
- Use of JVM: As it uses JVM, it doesn’t need to access library functions of Operating Systems.
- Bytecode Verifier: It keeps an eye on code fragments for illegal code that can violate access right to objects.
- Security Manager: It determines what resources a class can access such as reading and writing to the local disk.
- Classloader: Classloader which used in Java is a part of the Java Runtime Environment(JRE) which is used to load Java classes into the Java Virtual Machine dynamically. It adds security by separating the package for the classes of the local file system from those that are imported from network sources which can be vulnerable for the constructed code.
Java is portable because it facilitates you to run the Java bytecode to any platform once it is created on any certain platform.
Java is an interpreted language that is why it is slower than compiled languages, e.g., C, C++, etc but it is faster than other traditional interpreted programming languages.
A thread is like a separate program, executing concurrently. A Java program can be made which deal with many tasks at once by defining multiple threads. The main advantage of multi-threading is that it doesn’t occupy memory for each thread whereas it shares a common memory area. Threads are important for multi-media, Web applications, etc.