What Is a Simple Data Type in Java?


Angela Bailey

In Java, a simple data type refers to the basic building blocks used to store and manipulate data. These data types are predefined in Java and are not created by the programmer. There are eight primitive data types in Java: byte, short, int, long, float, double, char, and boolean.

Numeric Data Types:

The numeric data types in Java are used to represent numbers. These include:

  • byte: This is the smallest integer data type in Java, which can hold values from -128 to 127.
  • short: This data type can store larger values than byte, ranging from -32,768 to 32,767.
  • int: The int data type is commonly used for storing whole numbers and has a range of -2,147,483,648 to 2,147,483,647.
  • long: This data type is used for storing larger whole numbers that exceed the range of int. It can hold values from approximately -9 quintillion to 9 quintillion.
  • float: Float is a single-precision floating-point number that can represent decimal values with up to seven digits of precision.
  • double: Double is a double-precision floating-point number that provides greater precision than float. It can hold decimal values with up to fifteen digits of precision.

The Character Data Type:

The char data type is used to represent a single character. It can store characters from the Unicode character set, such as letters, numbers, and special symbols. For example, ‘A’, ‘7’, or ‘@’.

The Boolean Data Type:

The boolean data type is used to store either true or false values. It is commonly used in conditional statements and loops to control the flow of the program.


In Java, simple data types provide the foundation for storing and manipulating data. Understanding these data types is crucial for writing effective and efficient Java programs.

The eight primitive data types – byte, short, int, long, float, double, char, and boolean – cover a wide range of data storage needs. By utilizing these simple data types effectively, programmers can build complex applications that handle various types of information.

Now that you have a better understanding of what simple data types are in Java, you can start exploring their usage and explore more advanced topics in programming!

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