import java.io.*; class Demo { public static void main(String args[]) { File f=new File("1234.msg"); String arr[]=f.list(); System.out.println(arr.length); } }

3 Answers   IBM, Ramco,

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I have a sorting issue with a Hashmap. My constraint is that I MUST use the Hashmap and work with existing code. I do a database query and place the results in a Hashmap. When I iterate thru the Hashmap, it loses the original alphabetical sorting done by the database. So, my problem is that I must sort the results coming out of the Hashmap which is then placed into another class.

1 Answers  

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What is difference between static class and singleton pattern?

0 Answers  

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What is the difference between numeric and integer?

0 Answers  

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What are the two types of java?

0 Answers  

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How do you pass by reference?

0 Answers  

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without using arthematic operation ,how can you write the logic for adding/substraction/multiplication?

7 Answers   Tanla Solutions, Wipro,

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what is difference between method overloading & method overridding with example?

4 Answers   IBM,

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Explain about doubly linked list

0 Answers   Aditi Placement Service,

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How do you identify if jvm is 32-bit or 64-bit from java program?

0 Answers  

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Differentiate between == and equals().

0 Answers  

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Explain inner classes ?

0 Answers  

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