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Query

 
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Could someone please tell me what is this ClASSPATH and what is it's use?
Secondly can constructors be private?
Suppose I have to define only one interface in a FILE and no other code (no other class except interface )how should I save this file ?As .java ???


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M.Kartik
 
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You can read about CLASSPATH here.

Yes, constructors can be private. Only code within the class can use such a constructor, of course, but sometimes this is handy -- for example, if you need to create a Singleton class.

If the interface is named Foo, then name the file Foo.java , just as you would do for a class.
 
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