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Is there a specific reason why Java does not have an in-built external sort algorithm implemented ?

rakeshr
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Because the JDK contains only the mostly used components.

It is the same thing with any external framework content. Why isn't it directly built-in ?

Simply because it doesn't need to be built-in. And because it's not developed by the same people.

But still you can use an external framework, or a library which will help you with that.

Resources :

Colin Hebert
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  • Quick question: how do you differentiate between what does into part of a framework and what goes into libraries – rakeshr Sep 18 '10 at 06:37
  • You can check this out : http://stackoverflow.com/questions/724438/what-is-the-difference-between-a-class-library-and-a-framework – Colin Hebert Sep 18 '10 at 06:51
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I don't think any modern language has external sorting built-in. Usually, it's just not part of the scope of a programming language. Also, think of embedded (or specialized) devices that have limited (or no) external memory, only RAM. Language features such as external sorting would be purposeless.

David Titarenco
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  • Well, so would be file IO in general on those devices, that point isn't very convincing ;-). But agreed that it is well out of scope for a general programming framework. – Joey Sep 18 '10 at 06:29
  • I don't think any language *ever* has external sorting built-in. – Chris Sep 18 '10 at 06:31
  • @Chris SQL has external sort built in - which is another reason java doesn't need it. – emory Sep 18 '10 at 06:37