08 Data types | Core Java | Murari Walake

In Java, data types are used to define the type of data that a variable can hold. Each data type has a specific range of values and operations that can be performed on it. Here are some commonly used data types in Java:

Primitive Data Types:

byte: Represents a signed 8-bit integer. Range: -128 to 127.
short: Represents a signed 16-bit integer. Range: -32,768 to 32,767.
int: Represents a signed 32-bit integer. Range: -2,147,483,648 to 2,147,483,647.
long: Represents a signed 64-bit integer. Range: -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807.
float: Represents a single-precision 32-bit floating-point number.
double: Represents a double-precision 64-bit floating-point number.
boolean: Represents a boolean value, either true or false.
char: Represents a single Unicode character.
Reference Data Types:

String: Represents a sequence of characters.
Array: Represents a collection of elements of the same type.
Class: Represents a class type.
Interface: Represents an interface type.
Enumeration: Represents a set of predefined constants.
Object: Represents a reference to an object of any class.
Java also supports type conversion between compatible data types, such as implicit conversion (widening) and explicit conversion (narrowing). Additionally, Java allows for user-defined data types through the use of classes and interfaces.

Understanding data types in Java is crucial because it determines the memory allocation and operations that can be performed on variables. It is essential to choose the appropriate data type based on the nature of the data and the requirements of the program to ensure proper storage and manipulation of data.


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