Easy Way To Memorize The Size of Java Primitive Types int, char, float, double, long, boolean

Question

This is a very common question for online java exams. Can we find an easy mnemonic to memorize this size of primitives. Read a textual answer here . We need to find a shortcut to keep it in mind.

Answer 1

One way I found was to reorder the list into groups with same size and create a mnemonic to memorize it.

• boolean (1 bits)
• byte (8 bits)
• char, short (16 bits)
• int, float (32 bits)
• long, double (64 bits)

Now the Spell :

1 hooligan got 8 bites and his 16 wheeled car was shot into floating waters double the size of london 64

• hooligan : boolean
• bites : byte
• car - char
• shot - short
• double - double
• london 64 - long

Tip : Note that that the unit is bits and each group increment the size twice its predecessor except for byte.