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initialization collection in entity class

 
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Hi,

I am using this initialization of collection:



but is it the best practice ? Why not following ?


 
Greenhorn
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Dear The second code will not compile.
This will give you a compile time error - incompatible types error , required:java.util.List<javax.swing.Document> found :java.util.HashSet
 
manu chaox
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Pawan Kr Gupta wrote:Dear The second code will not compile.
This will give you a compile time error - incompatible types error , required:java.util.List<javax.swing.Document> found :java.util.HashSet



Sorry, my mistake. I have edited it. Thank you for reply.
But the question remains.
 
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Both are valid.

In general lazy initialization is more efficient, as you will not incur the cost of allocating the list unless you use it.

However, lazy initialize is more prone to null-pointers, as you must ensure you use the get method, not access the variable directly.
 
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