public interface Animal {

void say();

}

public class Cat implements Animal {

String name;

public void setName(String name) {

this.name = name;

}

@Override

public void say() {

System.out.println("i am a cat");

}

@Override

public String toString() {

return "name==>" + this.name;

}

}

import com.google.inject.AbstractModule;

public class AnimalModule extends AbstractModule {

@Override

protected void configure() {

bind(String.class).toInstance("Tom");

bind(Animal.class).toProvider(AnimalProvider.class);

System.out.println("run configure");

}

}

import com.google.inject.Inject;

import com.google.inject.Provider;

public class AnimalProvider implements Provider<Animal>{

String name;

@Inject

public AnimalProvider(String name) {

this.name = name;

}

public Animal get() {

Cat cat = new Cat();

cat.setName(name);

System.out.println("run Provider.get()");

return cat;

}

}

import com.google.inject.Guice;

import com.google.inject.Injector;

public class Test {

public static void main(String[] args) {

Injector injector = Guice.createInjector(new AnimalModule());

AnimalProvider provider = injector.getInstance(AnimalProvider.class);

Animal cat = provider.get();

System.out.println(cat);

cat.say();

}

}