Set is the child interface of Collection. It is introduced in the java 1.2 version. If our requirement is to represent a group of individual objects in a single entity, where insertion order is not preserved and duplicate is also not allowed then we can use set. Set Interface doesn’t contain any new methods ….  Read More

  When we want to get each object one by one from the collection we should go for cursors. There are three types of cursors available in java Collection framework. Enumeration Iterator ListIterator   Enumeration: It is introduced in the java 1.0 version. Using Enumeration we can get objects One by One from the old ….  Read More

Vector Vector is a part of the Java Collection framework since the java 1.2 version. It is implements the List interface, It is found in the java.util package. Vector is the best choice if our frequent operation is retrieval operation. SO if we are want to search and get data from the list then Vector is ….  Read More

  Introduction List Interface is the child interface of collection. The List interface is present in java.util package. When we want to represent a group of individual objects in a single entity, where duplicates are allowed and insertion order preserved. Then we should go for the list interface. In List Interface insertion Order is preserve ….  Read More

  Introduction: When we are representing a group of individual objects in a single entity then we should go for Collection Interface. Collection interface is the root interface of  collection framework. Collection framework holds all the collection classes and interfaces. Collection interface defines the most common methods which are applicable for any collection object. The ….  Read More

The need for Collection: Array: An Array is an indexed collection of a fixed number of homogeneous data elements. Using arrays the main advantage is we can represent multiple values in a single variable by using arrays. So that Readability of the Code will be Improved.   There are some limitations of object type arrays: ….  Read More

Introduction Inner class means a class is declared inside another class that type of class is called inner classes. Inner classes introduced in 1.1 version as part of “EventHandling” to resolve GUI bugs. Inner classes are very powerful features and also so many benefits that’s why nowadays programmers start using regular coding.     Without ….  Read More

Introduction: In old languages like C/C++ programmer is responsible for both the creation and destruction of objects. Usually, programmers are taking very much care while creating objects and neglect the destruction of useless objects. Due to his negligence at a certain point of time for the creation of a new object if sufficient memory may ….  Read More

Java ClassLoader The Java ClassLoader is a part of the (JRE)Java Runtime Environment that dynamically loads Java classes into the (JVM)Java Virtual Machine at run time. Java ClassLoader is an abstract class. It belongs to java.lang package. Java classes aren’t loaded into memory all at once, but when required by an application at that time, ….  Read More

Introduction: Exception: An exception is an unwanted or unexpected event, that disturbs the normal flow of the program i.e at run time is called an exception.   It is highly recommended to handle exceptions so that the program terminates normally. The main objective of exception handling is graceful (normal) termination of the program.   What ….  Read More