alex-ber

public class MyDriver {
  public static void main(String[] args){
    System.out.println("Hello World!")
  }
}

alex-ber

static class Bar {
    public static void main(String[] args) {
        Class<?> cl=new Object(){}.getClass().getEnclosingClass();
        System.out.println(cl==Bar.class);  //will print true
    }
}

alex-ber

public class SomeClass {
   public void foo(){
      class Local {};
      String name = Local.class.getEnclosingMethod().getName();
   }
 }

alex-ber

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class SomeClass {
	private static final Logger log = LoggerFactory.getLogger(new Object() {
	}.getClass().getEnclosingClass());
	
	public void foo(){
	  log.debug("foo()");
	}

alex-ber

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class SomeClass {
	private static final class Local {}; 
	private static final Logger log = LoggerFactory.getLogger(Local.class.getEnclosingClass());
	
	public void foo(){
	  log.debug("foo()");
	}

alex-ber

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class SomeClass {
	private static final Logger log = LoggerFactory.getLogger(new Object() {
	}.getClass().getEnclosingClass());
	
	public void foo(){
	  class Local {};
	  String name = Local.class.getEnclosingMethod().getName();

alex-ber

public class Horse extends Animal{
    @Override
    public void sound(){
        System.out.println("Neigh");
    }
}

alex-ber

public class Driver {
    public static void main(String args[]){
    	Animal obj = new Horse();
    	obj.sound();
    }
}

alex-ber

// changing the implementing object in run-time (normally done in compile time) 
class C implements I {
	private I i;
	// forwarding
	public C(I i){ this.i = i; }
	public void f() { i.f(); }
	
}
 

alex-ber

public class Main {
	public static void main(String[] arguments) {
		C c = new C(new A());
		c.f();	// output: A: doing f()
                c = new C(new B());
		c.f();	// output: B: doing f()

	}
}