Integer data types - Java Language Tutorial

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There are four different integer types in Java with the only difference that they differ in number of bits, and these are.

byte
short
int
long

When typing a number in java code it's assumed to be of type 32-bit integer. If it's supposed to be of type long that has to be explicitly marked by an L or l.

1234 //assumed integer, 32-bit

1234L //the L tells the compiler to operate on it as a 64-bit number.

Each of the integer types has a corresponding wrapper class with the same name as the data type except it is capitalized:

Byte
Short
Int
Long

These classes are for example helpful when wanting to convert between numbers and strings.

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