I need to store millions of string with common prefixes (they don\'t c开发者_开发百科orrespond to file system paths) in a Set like structure in memory, and query the Collection to see if a path exists
I am having some trouble as follows: When i add a new user,it works fine but when I add the second user, it forgets the first one. It keeps forgetting the preceding user added before it. Here is the c
I have the following Java Collection List<Map<String, Object>> I\'ve written a custom converter class which can flatten this down to a List of MyEntity (where MyEntity is basically Stri
I want to be able to combine sublists into a single list using lambdaj. I have an iterative version that works:
I have an ArrayCollection we\'ll call \"Items\". It is essentially a flat collection of hierarchical data (each item has Parent and Children properties). I want an AdvancedDataGrid to display the data
This question relates to one of my previous ones. I\'d like to have a thr开发者_运维问答ead-safe set which I can access and modify in various classes, some Runnables and some not.
Is there a pre-implemented linked list out there that would have been implemented using id\'s instead of array indexes?
Let\'s say we have a bunch of Car objects. Each Car has some distinguishing properties e.g. manufacturer, model, year, etc. (these can be used to create distinct hashCodes).
Why does ICollection<T> implement both IEnumerable<T> and IEnumerable? What is the purpose of开发者_开发百科 this? How does IEnumerable benefit ICollection<T>?IEnumerable<T> i
I have a list of objects and I want to print them in a jasper pdf output as a table. The objects have 3 String istances. So I want something like this:
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