public interface Foo {
  int foo();
}

public interface Bar {
  int bar();
}

public class FooImpl implements Foo {
  @Override public int foo() { return 1; }
}

public class BarImpl implements Bar {
  @Resource private Foo foo;

  @Override public int bar() { return 10 + foo.foo(); }
}

// usage:
InjectionContext context = new DefaultInjectionContext();
context.registerBean(new FooImpl());
context.registerBean(new BarImpl());
context.freeze(); // "locks" context, so that it becames read-only

final Foo foo = context.getBean(Foo.class);
// actions on foo

<dependency>
  <groupId>com.truward.di</groupId>
  <artifactId>micro-di</artifactId>
  <version>1.0.5</version>
</dependency>