/******************************************************/
class Thing1 { } // using default constructor Thing1(){}

class Thing2 { 
    public String toString() {return "I am a Thing2!";}
}   

public class references {
    public static void main(String[] args) {
	
	new Thing1(); new Thing2();

	System.out.println(new Thing1());

	Thing1 t1 = new Thing1();
	Thing2 t2 = new Thing2();

	System.out.println(t1);

	System.out.println(t2);
    }
}

/* Output:
Thing1@_______
Thing1@_______
______________
*/