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December 02, 2008

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What is the differenc between Enumeration interface and iterator interface according to accessing?

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Asked By: charan

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Enumeration and Iterator both are using looping statement.Enumeration is legacy class.iterator is cotains extra
method than Enumeration.
Enumeration is a read only interface, by using this we can loop thro' the elements only. But using iterator interface we can traverse and also remove the object.

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interface, java, enumeration, iteraor

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java

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interface

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PC support technician

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Describe differences between a class and an interface

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Asked By: cool |

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A class can contain default implementation, while an interface should not contain any implementation at all.

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Thursday, April 03, 2008

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class, interface

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Software Development Engineer

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How is user interfaces powerful in AJAX?

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Asked By: ganesh |

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AJAX helps in refreshing / requerying parts of web page without reloading the entrie webpage there by increasing performance and ultimately user interface

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Tuesday, March 18, 2008

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interface, AJAX, user

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ajax

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what is difference b/w abstraction and interface?

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Asked By: charan |

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Abstract class contains one or more unimplemented methods left for future implementation by its derived class.it has all property of class it cannot be instantiated.it provides default behaviour.

Interface is mear specification nothing is implemented its just a declaration.in java using interface we can model multiple inheritance. it provides design flexibility.

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Sunday, March 16, 2008

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interface, abstraction, jva

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java

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Why can't we declare a static method in an interface?

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Asked By: charan |

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Because all methods declared in an interface are (implicitly) also "abstract" methods, by definition, they do not define the (implementation of) the method.
This would cause problems with multiple inheritance.

For example, If object C implemented interfaces A and B, and both A and B defined a static method F(), then some method invoked C.F(), then which F() would get invoked?
The one from A() or the one from B()? We don~t know which, and can~t know, so Java doesn~t let us complicate matters thus.

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Sunday, March 16, 2008

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interface, java, static, method

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java

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