public static void addFactoryImpl(Class impl) { }

BugReportFactory.addFactoryImpl(new BugReportFactoryAndroid());

private static IBugReportFactory INSTANCE = null;
public static void addFactoryImpl(Class impl) {
INSTANCE = (IBugReportFactory)impl;
}

BugReportFactory.addFactoryImpl(new BugReportFactoryAndroid().getClass());

BugReportFactory.addFactoryImpl(BugReportFactoryAndroid.class);

private static IBugReportFactory INSTANCE = null;
public static void addFactoryImpl(Class impl) {
     INSTANCE = (IBugReportFactory)impl;
}

private static Class INSTANCE = null;
public static void addFactoryImpl(Class impl) {
     INSTANCE = impl;
}

BugReportFactory.addFactoryImpl(BugReportFactoryAndroid.class);

BugReportFactory.addFactoryImpl(BugReportFactoryAndroid.class);

BugReportFactory.addFactoryImpl((new BugReportFactoryAndroid()).getClass());

BugReportFactory.addFactoryImpl(BugReportFactoryAndroid.class);

public static void addFactoryImpl(Object impl) { }

public static <T> void addFactoryImpl(T impl) { }

public interface BugReportFactory {
  public A createA();
  public B createB();
}

public class BugReportFactoryAndroid implements BugReportFactory {..}

public class BugReportFactoryIOS implements BugReportFactory {..}

public class Foo {
  private List<BugReportFactory> factories = new ArrayList<BugReportFactory>();

  public void addFactoryImpl(BugReportFactory factory) {
    factories.add(factory);
  }

  public void createAll() {
    for (BugReportFactory f : factories) {
      A a = f.createA();
      B b = f.createB();
      ...
    }
  }
}

private static IBugReportFactory INSTANCE = null;
public static void addFactoryImpl(Class<?> impl) {
    Object factoryImpl = null;
    try {
        factoryImpl = impl.newInstance();
    } catch (InstantiationException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IllegalAccessException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    INSTANCE = (IBugReportFactory) factoryImpl;
}

BugReportFactory.addFactoryImpl(BugReportFactoryAndroid.class);