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doubts about primitives types

André Asantos
Ranch Hand

Joined: Nov 23, 2009
Posts: 234
please anybody else knows what Wrappers means? Are from JSE 5 right? And any primitive type has a wrapper class as java.lang.Double from double right?

Thank you very much,
André AS
Jesper de Jong
Java Cowboy
Saloon Keeper

Joined: Aug 16, 2005
Posts: 15081

Googling for "java wrapper classes" gives you a lot of useful information in a fraction of a second.

For example:

Java Beginners FAQ - JavaRanch SCJP FAQ - The Java Tutorial - Java SE 8 API documentation
Ahmed Attyah

Joined: Apr 02, 2010
Posts: 4
sorry repeated post

Coming for you SCJP
Ahmed Attyah

Joined: Apr 02, 2010
Posts: 4
here is Sang Shin slide explains Primitives & Wrapper Types in easy way

Good Luck
marc weber

Joined: Aug 31, 2004
Posts: 11343

André Asantos wrote:... Are from JSE 5 right? ...

As Jesper's Wikipedia link explains, autoboxing was introduced in Java 5. However, the wrapper classes themselves have been around since Java 1.1.

"We're kind of on the level of crossword puzzle writers... And no one ever goes to them and gives them an award." ~Joe Strummer
I agree. Here's the link:
subject: doubts about primitives types
It's not a secret anymore!