The first reason is the platform independent feature of Java. Platform independent means programmers who developed their software in one platform can execute it on any platform or operating system regardless of underlying configuration, because of Java Virtual Machine. In other words, we can say that Java follows WORA rule which says Write Once Run Anywhere. Besides that Java provides security over eavesdropping, tampering, impersonation, and virus threat. Java also provides a multi-threading feature through which we can create multiple threads under any process which works independently and simultaneously. Other than these, the performance of Java is also impressive. It uses JIT(Just In Time Compiler) that is capable of compiling only that method which is being called and not the whole program. This saves a lot of time and makes the overall development efficient. Due to its high performance, Java has a wide variety of applications. Java is one of the oldest programming languages used for the development of android applications. It is also used for scientific and web applications.
Java is a simple programming language and easy to understand because it does not contain complexities that exist in prior programming languages. In fact, simplicity was the design aim of Javasoft , because it has to work on electronic devices where less memory/resources are available. Java contains the same syntax as in C, C++, so the programmers who are switching to Java will not face any problem in terms of syntax. Secondly, the concept of pointers have been completely removed from Java which leads to confusion for a programmer and pointers are also vulnerable to security.
Java is an object-oriented programming language. Everything in Java is an object. Object-oriented means we organize our software as a combination of different types of objects that incorporate both data and behavior. Object-oriented programming (OOPs) is a methodology that simplifies software development and maintenance by providing some rules.
The WORA (Write Once Run Anywhere) concept and platform independent feature make Java portable. Now using the Java programming language, developers can yield the same result on any machine, by writing code only once. The reason behind this is JVM and bytecode. Suppose you wrote any code in Java, then that code is first converted to equivalent bytecode which is only readable by JVM. We have different versions of JVM for different platforms. Windows machines have their own version of JVM, linux has its own and macOS has its own version of JVM. So if you distribute your bytecode to any machine, the JVM of that machine would translate the bytecode into respective machine code. In this way portability lets the programmers focus on development and productivity rather than writing different code for different platforms.
In Java, Java source code is compiled to bytecode and this bytecode is not bound to any platform. In Fact, this bytecode is only understandable by the Java Virtual Machine which is installed in our system. What I meant to say is that every operating system has its own version of JVM, which is capable of reading and converting bytecode to an equivalent machine native language. This reduces the overhead of programmers writing system specific code. Now programmers write programs only once, compile it, to generate the bytecode and then export it anywhere.Java code can be executed on multiple platforms, for example, Windows, Linux, Sun Solaris, Mac/OS, etc. Java code is compiled by the compiler and converted into bytecode. This bytecode is a platform-independent code because it can be run on multiple platforms
Java is robust because It uses strong memory management. There is a lack of pointers that avoids security problems. 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. There are exception handling and the type checking mechanism in Java. All these points make Java robust.
Java is best known for its security.Java is secured because Java programs run inside a virtual machine which is known as a sandbox. Java does not support explicit pointer. Byte-code verifier checks the code fragments for illegal code that can violate access right to object.JVM is an interpreter which is installed in each client machine that is updated with latest security updates by internet . When this byte codes are executed , the JVM can take care of the security
Java is architecture neutral because there are no implementation dependent features, for example, the size of primitive types is fixed.
Java is faster than other traditional interpreted programming languages because Java bytecode is "close" to native code.
Thread is a lightweight and independent subprocess of a running program (i.e, process) that shares resources. And when multiple threads run simultaneously is called multi-threading.A thread is like a separate program, executing concurrently. We can write Java programs that 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. It shares a common memory area
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++. and get free Coins
Java can be considered both a compiled and an interpreted language because its source code is first compiled into a binary byte-code. This byte-code runs on the Java Virtual Machine (JVM), which is usually a software-based interpreter.