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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What is the type of lambda expression?

0 Answers  

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How long will it take to learn java?

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What is ++ a in java?

0 Answers  

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"we cannot create an object of interface but we can create a variable of it".diacuss the statement with the help of an example.

2 Answers  

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how to handle http request in struts

2 Answers   Polaris,

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Which of the following can be referenced by a variable? A. The instance variables of a class only B. The methods of a class only C. The instance variables and methods of a class

2 Answers  

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What is the purpose of the File class?

3 Answers  

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What is thread safe java?

0 Answers  

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What happens when I use / and % with a negative numerator?

0 Answers  

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Is special character in java?

0 Answers  

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What is comparable and comparator interface? List their differences

0 Answers  

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