bind(String.class)
        .annotatedWith(Names.named("JDBC URL"))
        .toInstance("jdbc:mysql://localhost/pizza");

class SomeClass {
  @Inject
  SomeClass(@Named("JDBC URL") String jdbcUrl);
    this.jdbcUrl = jdbcUrl;
  }
}

class SomeClass {
  @Inject
  SomeClass(@JdbcUrl String jdbcUrl);
    this.jdbcUrl = jdbcUrl;
  }

  @Retention(RetentionPolicy.RUNTIME)
  @Target({ElementType.FIELD, ElementType.PARAMETER})
  @BindingAnnotation
  public @interface JdbcUrl {}
}

public class SomeModule extends AbstractModule {
  private final String jdbcUrl; // set in constructor

  protected void configure() {
    bindConstant().annotatedWith(SomeClass.JdbcUrl.class).to(jdbcUrl);
  }
}

class SomeOtherClass {
  @Inject
  SomeOtherClass(SomeClass someClass);
    this.someClass = someClass;
  }

SomeClass instance = Guice.createInjector(new MyModule("any string i like to use")).getInstance(SomeClass.class);