In this sneppet you will learn how to check if string is not empty and not null in Java. Note, a String with just whitespace is not considered as empty in Java. The following are the ways to test whether… Read More!
In Java abstraction is accomplished by using Abstract class and Interfaces. Abstraction is one of the most important concept of OOPs. Abstract class is similar to Interfaces in Java, except that it can contain methods with implementations also. Abstract Class… Read More!
AbstractCollection is an abstract class that extends Object and implements Collection interface. This class provides a skeletal implementation of the Collection interface, to minimize the effort required to implement this interface. This is a member of the Java Collections Framework.… Read More!
Enumeration interface is part of java.util package. An object that implements this interface generates a series of elements, one at a time. Successive calls to the nextElement() method return successive elements of the series. Enumeration Interface Java SE public interface… Read More!
A Map interface is an object that maps keys to values or handles key-value pairs. It cannot contain duplicate keys and each key can map to at most one value. Map interface hierarchy The Map interface Java SE The methods… Read More!
