How to Find Size of an int in Java

The int data type is a primitive data type in Java. The size of int is fixed as defined by Java language specification. The size of an int is 32 bits and it is consistent across all platforms that support Java language.

Determining the Size of an int

We can confirm the size of an int using a simple piece of code.

public class IntSize {
    public static void main(String[] args) {
        System.out.println("Size of int: " + (Integer.SIZE / 8) + " bytes");
    }
}

Explanation

• Integer.SIZE returns the number of bits required to represent an int.
• Since 8 bits equal to 1 bytes, dividing the retuned value by 8 converts the size from bits to bytes.

Output

The program produces following output

Size of int: 4 bytes

This confirms that the size of int in Java is 4 bytes.