Core Java Book By Nageswara Rao Pdf 12

I would recommend not to do it manually, its hard to get it correct and why to reinvent the wheel when there are plenty of solutions already exists? -

Dependency injection specification for java is JSR-299 and you can use Weld library as an reference implementation if you don't want to use Spring

You can consider Guice framework as well , its a lightweight DI framework.