Can we place the any object to key attribute of HashMap<key,value>?

4 Answers   HCL,

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public class Base { public void myMethod(int a,intb) {} } // Uses myMethod and then hides it. public class DerivedOne extends Base { private void myMethod(int a,int b); } will this compile or not .yes or no. why

2 Answers  

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what is difference between validation.xml & validation rules.xml?

8 Answers   BirlaSoft,

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How will you create the class for the following scenario? Employees under one employee?

2 Answers   Bally Technologies,

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Is oracle charging for java?

0 Answers  

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What is a Null object?

1 Answers   Wipro,

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Why packages are used?

5 Answers  

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What is the purpose of methodology?

0 Answers  

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What is casting?

5 Answers  

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What are the benefits of immutable objects?

0 Answers  

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Why do we need hashmap in java?

0 Answers  

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Can we cast any other type to boolean type with type casting?

0 Answers  

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