Sorry, the code is:
import javax.swing.JPanel;
import com.google.inject.AbstractModule;
import com.google.inject.Guice;
import com.google.inject.Inject;
import com.google.inject.Injector;
import com.google.inject.name.Named;
import com.google.inject.name.Names;
public class AnnotationDemo3 {
@Inject
@Named("panel")
public JPanel panel=null;
public AnnotationDemo3(){
System.out.println(panel);
}
public JPanel getPanel() {
return panel;
}
public void setPanel(JPanel panel) {
this.panel = panel;
}
public static void main(String[] args) {
Injector injector = Guice.createInjector(new AbstractModule() {
@Override
protected void configure() {
bind(JPanel.class).annotatedWith(Names.named("panel")).to(
MyPanel.class);
}
});
AnnotationDemo3 demo3 =
injector.getInstance(AnnotationDemo3.class);
System.out.println(demo3.panel);
}
}
class MyPanel extends JPanel {
}
On Aug 19, 7:00 am, Stuart McCulloch <[email protected]> wrote:
> 2009/8/19 zhaoyi <[email protected]>
>
>
>
> > Below is my code. The class AnnotationDemo3 has a panel field which
> > will be injected by annotation. The output of this program is:
>
> > null
> > demo.bindinganontation.MyPanel[,
>
> > 0,0,0x0,invalid,layout=java.awt.FlowLayout,alignmentX=0.0,alignmentY=0.0,border=,flags=9,maximumSize=,minimumSize=,preferredSize=]
>
> > In the constructor, the printf will print a null value which means the
> > panel field doesn't have been created at this time. How can I let it
> > creates the field at the very beginning time of the create created.
>
> I don't see any code here, but it sounds like you need to use constructor
> injection:
>
> http://code.google.com/p/google-guice/wiki/Injections
>
> thanks.
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