Wrapper Classes in Java

Generally, the wrapper class in Java is used to wrap or represent the value of primitive data types (int, boolean, etc.) as an object. It is a type of class whose object contains primitive data types. Here also include some methods which are used to unwrap the object back into a primitive data type. The wrapper class in java provide under java.lang package. There are two types of features are available to convert primitives into objects and objects into primitives i.e.: Autoboxing & Unboxing.

Operator Precedence and Associativity in Java

The operator is applied and evaluated based on precedence. For example (+,-) has less precedence compared to (*,/). Hence * & / are evaluated first.
In case we like to change this order we use parenthesis.

Keywords in JAVA

Keywords in Java are reserved words by the compiler which has a special function and set of definitions.  Here the meaning of the reserved words is that these keywords are already predefined by Java so these cannot be used or not allowed for any other program elements like variable or identifier or object name or class name, methods etc. These are the fixed word which is used for a particular purpose. Till now there are 52 keywords in java these are: abstract continue for new switch
assert default goto package synchronized
boolean do if private this
break double implements protected throw
byte else import public transient
case enum instanceof return try
catch extends int short void
char final interface static volatile
class finally long strictfp while
const float native super

Operators in Java

Operators in Java – The symbol that is used to perform some logical and mathematical operations are called operators. These are very important to perform an operation on variables and values. There are different types of operators which are available in Java based on their functionalities these are as given below: Arithmetic Operator
Assignment Operator
Relational Operator (Comparison Operator)
Logical Operator
Bitwise Operator

Non-Primitive Data Types in Java

Data types are basically used for declaring variables and functions of different types. It can define different sizes and values which are used to store variables. Non-primitive data types are also called reference types. This is because these data types are directly referred to as objects. It means like primitive data types these data types are not pre-defined. These are popular for user-defined which are created by programmers. There are various types of non-primitive data types in java i.e.:
Class
Object
String
Array
Interface

Data Types in Java

Data types are basically used for declaring variables and functions of different types. It can define different sizes and values which are used to store variables. In Java, data types are two types i.e.: Primitive Data Types (Intrinsic)
Non-Primitive Data Types (Derived)

Variable, Constant & Literals in JAVA

A variable is a data name that is used for storing a data value. The value of the variable may be changed during the program execution, Example: – int number = 8; Here ‘int’ is a data type, ‘number’ is a variable name and 8 is a value that it stores.

Structure of Java Program

Structure of Java Program There are various concepts used in a java program i.e.: Classes
Objects
Packages
Methods
Interface
OOPs Concept
Exception Handling
Multi-Threading
Collection Framework

Difference between C++ and Java

Difference between C++ and Java It is better to learn more about Java due to the diversity and flexibility it provides. On other hand, people are looking forward to building operating systems, gaming engines, etc. those where high performance is needed, so to get benefits C++ can provide a better experience for these requirements.

Applications of Java

Java is one of the popular, demanded programming languages. It is most popular because of its high security, and easy-to-use-like features. The biggest benefit is that by using java we can develop various numbers of applications. But in today’s topic, we will focus on the application of Java. We all know that java has n number of applications. So today we discuss about few applications of java