why java is best programming language?

It's difficult to say that Java is objectively the "best" programming language because the "best" language depends on various factors such as the purpose of the project, the programming paradigm needed, the team's skillset, and the available resources, among other things.

However, Java is considered one of the most popular and widely used programming languages today because of its benefits and features, such as:

Platform independence: Java programs can run on any platform with a Java Virtual Machine (JVM), making them highly portable.
Object-oriented programming: Java is an object-oriented programming (OOP) language, which provides modularity and reusable code, making it easier to develop and maintain large-scale applications.
Rich libraries: Java has a vast collection of standard libraries, which simplifies coding and makes it easier to perform various tasks.
Memory management: Java's garbage collection feature automates memory management and eliminates the need for developers to manually allocate and free memory, making programming more efficient.
Security: Java has a robust security model that protects systems from viruses and malicious software.
Community support: Java has a large and active developer community, which provides a wealth of resources, documentation, and support to new and experienced developers.

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These advantages have made Java a popular choice for developing various applications such as web, mobile, desktop, and enterprise applications. However, the "best" programming language ultimately depends on the specific needs of the project and the team's expertise.