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we know that Object class is super class of every class & a class extends only one class. so how is it possible to a class to extend other than Object class?
Because java supports multilevel inheritance.
mandyjoshi
- Nov 11th, 2005
The half answer is explain by Krishna Prasad and Other half lies in answer of question why java does not support multiple inheritance. And how it has solved that problem using interfaces.
krishna prasad
- Nov 4th, 2005
case 1suppose you have a class Test, which doesn't extend any other class. So by default, Object becomes it's super class. ...
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what is difference between string and stringtokenizer?
prasanna_b2001@yahoo.com
- Dec 16th, 2005
String and stringtokenizer serves different string operations. there is no point in comparing these two.
katam
- Nov 14th, 2005
stringtokeniser can devide the the string into tokens.where string is group of characters within " ">
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if interface & abstract class have same methods & abstract class also not contain any implementation for those methods which one you prefer ?
use abstract class because we implement only requried methods of abstract class but for interface we must implement all methods whether or requried or not
msarada
- Aug 24th, 2006
if we want to have all the other properties of the abstract class along with the unimplemented methods, then we prefer an abstract class otherwise we go for an interface(in order to have multiple inheritance).
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what is difference between array & arraylist?
arraylist is resizable where as using array it is not possible.
Sukhrob
- Dec 24th, 2015
First difference: array is already with fixed size while array lists size could be dynamically changed.
Secondly, array can include only the same type of data while array list can consist of different primitive data types as well as objects.rakesh
- Nov 18th, 2015
Array is collection of similar data type values. We cant resizable and growable of array. It is already fixed when you declared while array list works as a dynamic in which size could be grow. It is a part of collection framework to handle or store the collection of object not any type of values.
