• What is java?

Java is a programming language and a platform. Java is a high level, robust, secured and object-oriented programming language
  •  What is platform in java programming?

Any hardware or software environment in which a program runs, is known as platform. Since java as its own runtime environment (JER) and (API), it is called a platform
  • Java OOPs Concepts
Object oriented programing is a paradigm that provides many concepts such as inheritance, data, binding, polymorphism etc.
  • Java Strings
Java string provides a lot of concepts that can be performed on a string such as compare, concat, equals, split, length, replace, compareTo, substring etc.
  • Java Inner Class
Java inner class or nested class is a class i.e. declared inside the class ort interface. We use inner classes to logically group classes and interface in one place so that it can be more readable and maintainable.
  • Java Regex
The java regex or regular expression is an API to define pattern for searching or manipulating strings such as passwords and email validation. After learning java regex tutorial, you will be able to test your own regular expressions by the java Regex Tester Tools
  • Exception Handling in Java
The exception handling in java is one of the powerful mechanism to handle the runtime errors so that normal flow of the application can be maintained. In this page, we will learn about java exception, its types and the differences between checked and unchecked exceptions.
  • Multithreading in Java
Multithreading in java is a process of executing multiple threads simultaneously. Thread is basically a lightweight sub-process, a smallest unit of processing.  Multiprocessing and multithreading, both are used to achieve multitasking.
  • Synchronization in Java
Synchronization in java is the capability to control the access of multiple threads to any shared resources. Java Synchronization is better option where we want to allow only one thread to access the sheared resources.
  • Java I/O (input & output)
Java I/O (input and output) is used to process the input and produce the output based on the input. Java uses the concept of stream to make I/O operation fast. The package contains all the classes required for input and output operations.
  • Serialization in Java
Serialization in Java is a mechanism of writing the state of an object into a byte stream. It is mainly used in Hibernate, RMI, JPA, EJB, JMS technologies. The reserve operation of serialization is called deserialization.
  • Java Networking
Java Networking is a concept of connecting two or more computing devices together so that we can share resources. Java socket programming provides facility to share data between different computing devices.
  • Java AWT
Java AWT (Abstract windowing toolkit) is an API to develop GUI window-based application in java. Java AWT components are platform-dependent i.e. components are displayed according to the views of operating system. AWT is a heavyweight i.e. its components uses the resources of a system. The java.awt package provides classes for AWT api such as TextField, Label, TextArea, RadioButton, CheckBox, Choice, list etc.
  • Layout Managers
The Layout Manager are used to arrange components in a particular manner. Layout Manager is an interface that is implemented by all the classes of layout managers.
  • Java Applet
Applet is a special type of program that is embedded in the webpage to generate the dynamic content. It runs inside the browser and works at client side.
  • Java Reflection API
Java Reflection is a process of examining or modifying the run time behavior of class at run time. The java.lang.Class provides many methods that can be used to get metadata, examine and change the run time behavior of class
  • Java Date
The java.util, java.sql and java.text package contains classes for representing date and time. Following classes are important for dealing with date in java.
  • Java String to int
We can convert string to int In java using integer.parseint() method
  • Collection in Java
Collections in java is a framework that provides an architecture to store and manipulate group of objects. All the operations that you perform on a data such as searching, sorting, insertion, manipulation, deleting etc. can be perform by java collections. Java collections simply means a single unit of objects java collection framework provides many interface (Set, List, Queue, Deque etc) and classes (ArrayList, vector, LinkedList, priorityQueue, HashSet, LinkedHashset, TreeSet etc).
  • Java JDBC
 Java JDBC is a java API to connect and execute query with the data base. JDEC API uses jbdc drivers to connect with the database.
  • New Features in Java
There are many new features that have been added in java. There are major enhancement made in java5, java6 and 7 like auto-boxing, generics, var-args, java annotation, enum, premain method etc.
  • RMI (Remote Method Invocation)
The RMI is an API that provides a mechanism to create distributed application in java. The RMI allows an object to invoke methods on an object running to another JVM
  • Internationalization and Localization
Internationalization is also abbreviated as I18N because there are total 18 characters between the first letter “I” and the last letter “N”. Localization is also abbreviated as I10N because there are total 10 character between the first letters “L” and last letter “N”. Localization is the mechanism to create such an application that can be adapted to a specific language and region by adding locale-specific text and  component.

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