Thread: BUILDING APPS?

Is java easy to learn?Will it give me long carrer?
Will it cope up for building desktop applications as well as mobile applications?

from Oracle.com:

Why Java?

Java is the foundation for virtually every type of networked application and is the global standard for developing and delivering enterprise software, web-based content, games and mobile applications. Java enjoys a large and mature ecosystem with strong tools support. Java delivers application portability and robust performance across many computing environments.

from Java.com:

Why Software Developers Choose Java
Java has been tested, refined, extended, and proven by a dedicated community of Java developers, architects and enthusiasts. Java is designed to enable development of portable, high-performance applications for the widest range of computing platforms possible. By making applications available across heterogeneous environments, businesses can provide more services and boost end-user productivity, communication, and collaboration—and dramatically reduce the cost of ownership of both enterprise and consumer applications. Java has become invaluable to developers by enabling them to:

• Write software on one platform and run it on virtually any other platform
• Create programs that can run within a web browser and access available web services
• Develop server-side applications for online forums, stores, polls, HTML forms processing, and more
• Combine applications or services using the Java language to create highly customized applications or services
• Write powerful and efficient applications for mobile phones, remote processors, microcontrollers, wireless modules, sensors, gateways, consumer products, and practically any other electronic device

that should answer your question
And if it will you give a long career? Personaly i think yes, or at least it will give you a rock solid ground for other programming languages, like c# (or c or c++) or ruby etc. Learning java is not wasting time..