Java Assignment Help

Classe, Object, Constructor, Java Variable, Access Modifier,Java Operators, Keywords, Overloading, 

Overriding, Exception, Collection, Inheritance, Strings, Arrays.

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Class − A class can be defined as a template/blueprint that describes the behavior/state that the object of its type support.

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Object − Objects have states and behaviours. Example: A dog has states - color, name, breed as well as behaviors – wagging the tail, barking, eating. An object is an instance of a class.

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Constructors: A constructor initialises an object when it is created. It has the same name as its class and is syntactically similar to a method. However, constructors have no explicit return type.

Java Variables: A variable provides us with named storage that our programs can manipulate. Each variable in Java has a specific type, which determines the size and layout of the variable's memory; the range of values that can be stored within that memory; and the set of operations that can be applied to the variable.

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Access Modifiers: Modifiers are keywords that you add to those definitions to change their meanings. Java language has a wide variety of modifiers, including the following −

• Java Access Modifiers

• Non Access Modifiers

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Java Operators: Java provides a rich set of operators to manipulate variables. We can divide all the Java operators into the following groups − Arithmetic Operators, Relational Operators, Bitwise Operators, Logical Operators,

Assignment Operators, Misc Operators

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Keywords: Keywords or Reserved words are the words in a language that are used for some internal process or represent some predefined actions

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Overloading: Overloading allows different methods to have the same name, but different signatures where the signature can differ by the number of input parameters or type of input parameters or both.

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Overriding: Overriding is a feature that allows a subclass or child class to provide a specific implementation of a method that is already provided by one of its super-classes or parent classes.

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Exception: An exception (or exceptional event) is a problem that arises during the execution of a program. When an Exception occurs the normal flow of the program is disrupted and the program/Application terminates abnormally, which is not recommended, therefore, these exceptions are to be handled.

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Collection: The Collection in Java is a framework that provides an architecture to store and manipulate the group of objects

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Inheritance: Inheritance is an important pillar of OOP(Object Oriented Programming). It is the mechanism in java by which one class is allowed to inherit the features(fields and methods) of another class.

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Strings: String is basically an object that represents a sequence of char values. An array of characters works the same as Java string.

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Arrays: Java array is an object which contains elements of a similar data type. Additionally, The elements of an array are stored in a contiguous memory location. It is a data structure where we store similar elements. We can store only a fixed set of elements in a Java array.

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Advanced Java includes: Regular expressions, Logging, Bit manipulation, Serialization, Networking with sockets,

Remote Method Invocation, Java Database Connectivity 

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Regular expressions: A regular expression is a special sequence of characters that helps you match or find other strings or sets of strings, using a specialized syntax held in a pattern. They can be used to search, edit, or manipulate text and data.

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Logging: Logging in Java requires using one or more logging frameworks. These frameworks provide the objects, methods, and configuration necessary to create and send log messages.

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Bit manipulation: Java enables you to manipulate integers on a bit level, which means operating on specific bits, which represent an integer number. It used OR, AND, etc for manipulating bit.

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Serialization: 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 and JMS technologies.

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Networking with Sockets: Java Socket programming is used for communication between the applications running on different JRE. Java Socket programming can be connection-oriented or connection-less.

Socket and ServerSocket classes are used for connection-oriented socket programming and DatagramSocket and DatagramPacket classes are used for connection-less socket programming.

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Remote Method Invocation: Remote Method Invocation (RMI) is an API that allows an object to invoke a method on an object that exists in another address space, which could be on the same machine or on a remote machine.

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Java Database Connectivity: There are 5 steps to connect any java application with the database using JDBC. These steps are as follows:

• Register the Driver class

• Create a connection

• Create a statement

• Execute queries

• Close connection