import javax.inject.Inject;
import javax.inject.Singleton;

import com.google.inject.Guice;
import com.google.inject.Injector;

@Singleton
public class HelloDemo {
	@Inject
	private HelloPrinter printer;

	public void hello() {
		printer.print();
	}

	public static void main(String[] args) throws Exception {
		Injector injector = Guice.createInjector();
		HelloDemo helloDemo = injector.getInstance(HelloDemo.class);
		helloDemo.hello();
	}
}

@Singleton
class HelloPrinter {
	public void print() {
		System.out.println("Hello, guice");
	}
}

https://gitee.com/dyyx/hellocode/blob/master/demo/guicedemo/src/main/java/dyyx/hellodemo/HelloDemo.java