Java is a widely-used programming language that supports a wide range of data types. In programming, data types define the type of data that can be stored in a variable. Understanding the different data types available in Java is crucial for writing efficient and effective programs. In this article, we will explore the different data types available in Java.

 

Primitive Data Types

 

Java has eight primitive types of data, which are the most basic data types that can be used in a program. These data types are:

 

  1. byte: A byte data type is an 8-bit integer that can store values between -128 and 127.
  2. short: A short data type is a 16-bit integer that can store values between -32,768 and 32,767.
  3. int: An int data type is a 32-bit integer that can store values between -2,147,483,648 and 2,147,483,647.
  4. long: A long data type is a 64-bit integer that can store values between -9,223,372,036,854,775,808 and 9,223,372,036,854,775,807.
  5. float: A float data type is a 32-bit floating-point number that can store decimal values up to 7 decimal digits.
  6. double: A double data type is a 64-bit floating-point number that can store decimal values up to 15 decimal digits.
  7. char: A char data type is a 16-bit Unicode character that can store a single character.
  8. boolean: A boolean data type is a true/false value that can store either true or false.

 

Reference Data Types

 

Java also has four reference data types, which are used to refer to objects:

 

  1. Class: A Class data type refers to a class or interface.
  2. Array: An Array data type refers to an array of values.
  3. Interface: An Interface data type refers to an interface.
  4. String: A String data type refers to a string of characters.

 

Java also supports the use of the null value, which is used to represent an absence of a value.

 

Wrapper Classes

 

Java provides wrapper classes for each primitive data type. These classes are used to convert primitive data types into objects. The wrapper classes are:

 

  1. Byte
  2. Short
  3. Integer
  4. Long
  5. Float
  6. Double
  7. Character
  8. Boolean

 

Conclusion
In conclusion, Java supports a wide range of data types that are used to store different types of values. The primitive data types are the most basic data types and are used to store values such as integers and floating-point numbers. The reference data types are used to refer to objects such as classes, interfaces, and strings. Finally, the wrapper classes are used to convert primitive data types into objects. Understanding the different data types available in Java is essential for writing efficient and effective programs.

 

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