Understand, thank you
On Oct 26, 5:03 pm, Stuart McCulloch <[email protected]> wrote:
> 2009/10/26 eric <[email protected]>
>
>
>
>
>
> > Hi, I met a problem when trying @Singleton of Guice:
>
> > import com.google.inject.Singleton;
>
> > @Singleton
> > public class ConfigManager {
> > private String data;
>
> > public void setData(String data) {
> > this.data = data;
> > }
>
> > public String getData(){
> > return this.data;
> > }
>
> > public static void main(String[] args){
> > ConfigManager config1 = Guice.createInjector().getInstance
> > (ConfigManager.class);
> > ConfigManager config2 = Guice.createInjector().getInstance
> > (ConfigManager.class);
> > config1.setData("data");
> > System.out.println(config2.getData());
> > }
>
> > }
>
> > Why this simple sample always print null?
>
> as the Guice javadoc states, @Singletons are per-injector:
>
> http://google-guice.googlecode.com/svn/trunk/javadoc/com/google/injec...
>
> (strictly speaking they are per-injector, per-binding-key)
>
> so config1 and config2 are two different instances from two different
> injectors
>
>
>
> --
> Cheers, Stuart
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