Object.toString(), System.identityHashCode()

Object obj = new Object();

System.out.println("1. " + obj.toString());

System.out.print("2. ");

System.out.print(obj.getClass().getName());

System.out.print("@");

System.out.print(Long.toHexString(System.identityHashCode(obj)));

System.out.println();

// console

1. java.lang.Object@1c78e57

2. java.lang.Object@1c78e57