There are many reasons why a developer or business might prefer Java over C#.NET. Some of these reasons include:
Java is a more widely used language than C#, so there is a larger pool of developers to choose from.
Java is platform independent, so it can be run on any operating system.
Java is more suited for large-scale projects than C#.
Java has better support for web applications than C#.
Java is more flexible and can be easily integrated with other languages.