what is the main usage of an abstract keyword?please follow the program class A { void display() { System.out.println("hai"); } void print() { } } class B extends A { void print() { System.out.println("Hello"); } } In this program i was gives the implementation of print() according to my requirements in subclass.And there is no definition in superclass then why we can use abstract keyword before a method that i want to gives definition in other classes,is any mistakes in the above usage of method?

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what is the purpose of postback?

2 Answers   Nth Solution,

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WHAT IS MAIN IMPORTANT THING IN SOFTWARE?

0 Answers   Infosys,

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why main() method should not return any value

2 Answers   Accenture,

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What is abstract Method i want the exact definition and is there any possibility to declare class as abstract without any abstract methods in that class?If it is possible then tell me why and how?

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What Is The Difeerence Between C & C++

2 Answers   HCL,

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along with oracle which language will be beneficial to have knowledge with,java,.net,since i m doing oracle have appeared for 8th sem BEIT,plz suggest

0 Answers  

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Please anyone tell me coding to print prime numbers from 1 to 5000 in c#....

2 Answers  

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what is difference between sap and java ?

1 Answers  

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in network security,how we identified threat?some one say we found threat according to it's signature,but how we get signature or pattern of the virus?

0 Answers  

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what is diff bet ref variable & instance of class

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the systematic access of small computers in a distributed data processing system is referred as?

0 Answers   Mphasis,

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