IN java collections we have both interfaces and classes. instead of using interfaces why we can't use classes only like that why we can't use interfaces only. why we need two things interface and class.

6 Answers   Accenture, CTS,

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class{ ... ... interface myinterface{ ... ... } abstract class{ .. .. } ... .. .. } is this possible to write "Interface and/ or Abstract class inside a class ? if possible whcich one is possible is only interface? is only abstract?

2 Answers   Logica CMG,

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What is deadlock and how to avoid this?

2 Answers  

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Does java have extension methods?

0 Answers  

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What happens if a constructor is declared private?

0 Answers  

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Why declare Main() method as a static in java ?

0 Answers   HCL,

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What is OOP?

2 Answers   BMC, Microsoft,

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What is meant by object?

0 Answers  

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How much ram can a 64 bit processor theoretically?

0 Answers  

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Can we call the Thread.sleep in Synchyronozed block?

5 Answers   Logica CMG,

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explain the concept of virtual method invocation in polymorphism in detail?

0 Answers   TCS,

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How multipleInheritance is possible in java?

18 Answers   Satyam,

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