What is the purpose of long, double, byte, char in Java?

Question

So I\'m learning java, and I have a question. It seems that the types int, boolean and string will be good for just about everything I

Answer 1

It's relative to the data you're dealing with. There's no point using a data type which reserves a large portion of memory when you're only dealing with a small amount of data. For example, a lot of data types reserve memory before they've even been used. Take arrays for example, they'll reserve a default amount (say, 256 bytes <-- an example!) even if you're only using 4 bytes of that.

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