Answer Posted / janardhan

yes we can add object in Hashmap

example:--

ArrayList l=new ArrayList();
l.add(10);

HashMap map=new HashMap();
map.put(l,"13");

here l is object

Can a class have multiple superclasses?

1154

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What are methods?

1017

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Write an algorithm program in java for the following question.. 1) S is a set of integers.X is an integer obtained by sum of two digits in S. Write logic for whether or not the X is from the S. The time of algorithm should not exceed o(n logn).

2137

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What are the properties of thread?

924

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What is off heap memory?

1003

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What does system out println () do?

1004

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In a container there are 5 components. I want to display all the component names, how will you do that?

2186

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What exactly is methodology?

916

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How do you declare an array that will hold more than 64KB of data?

1281

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Why multiple inheritance is not supported by java?

973

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What is instance synchronization?

1044

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How are multiple inheritances done in Java?

1131

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Can we overload the main() method?

1039

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What is the use of 'super' keyword inside a constructor?

962

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What is classes in java?

935

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