Features of Java Programming Language that justifies its Popularity
Java is very easy to learn, and its syntax is simple, clear, and easy to understand.
Java syntax is based on C++ (so easier for programmers to learn it after C++).
Java has removed many complex and rarely used features, for example, explicit pointers, operator overloading, etc.
2)object – oriented:
Java is an object-oriented programming language. Everything in Java is an object.
Object-oriented programming (OOP) is a methodology that simplifies software development and maintenance by providing certain rules.
Java is platform independent because it is different from other languages like C, C++, etc.Which are compiled in platform specific machines whereas Java is a write once, run anywhere language. Platform is the hardware or software environment in which a program runs.
There are two types of platforms software-based and hardware-based. Java provides a software-based platform.
It has two components:The Java platform differs from most other platforms in the sense that it is a software-based platform that runs on top of other hardware-based platforms.
API(Application Programming Interface)
Java code is compiled by the compiler and converted into bytecode. This bytecode is a platform-independent code because it can run on multiple platforms, i.e., write once and run anywhere (WORA).
Java is best known for its security. With Java, we can develop virus-free systems. Java is secured because:
No explicit pointer to Java program running inside virtual machine sandbox
This adds security to the local file system’s classes by separating the package from classes imported from network sources.
It checks code fragments for illegal code that may violate access rights to objects.
It determines what resources a class can access such as reading and writing to the local disk.
Java language provides these securities by default. Some security may also be provided explicitly by an application developer through SSL, JAAS, cryptography, etc.
There is a lack of indicators to avoid security problems.
It uses strong memory management.
There are exception handling and the type checking mechanism in Java. All these points make Java robust.
Java provides automatic garbage collection which runs on the Java Virtual Machine to get rid of objects which are not being used by a Java application anymore.
Java provides automatic garbage collection that runs on the Java Virtual Machine to get rid of objects that are no longer being used by the Java application.
6) Dynamic :
Java supports dynamic compilation and automatic memory management (garbage collection).
Java is a dynamic language. It supports the dynamic loading of classes. It means classes are loaded on demand. It also supports functions from its native languages, i.e., C and C++.
The main advantage of multi-threading is that it does not occupy memory for each thread. It shares a common memory area. Threads are important for multi-media, Web applications, etc.