Can I make applications using java?

Answer 1

You can make any application with Java.
For example
1. You can make deskop application. eg. JavaFx, Swing
2. Web application using JSP, JSF with Spring
3. app with android etc

Answer 2

Yes you can ;)

- Mobile app development (Android)
- Website development (JSP)
- Database Stuff (JDBC)
- GUI based programs (JFC/Swing)
- Networking (Socket Programming)
- Image processing
- ...

So you could nearly do evertything with java.
Somethings are maybe a bit harder in Java (super fancy 3D games for example), but Java is a really allrounder

Answer 3

Well that is the idea of java... You can do anything you want