Thanks for raising this. If you think you can make the quesiton good, please edit it accordingly!

I think that the computer engineering-good question in there may not be a good CS question; it seems to me the user wants to write a Java program with lots of data and wants to know which class to use. That question would be for SO or programmers.SE.

If the question was "What data structure to use for lots of data?", we are a back to square one: the user has to specify the usage characteristics, otherwise we can't answer.

In short, I don't know what the OP wants. Until specified, this question should remain closed, imho.

Thanks for raising this. If you think you can make the quesiton good, please edit it accordingly!

I think that the Stack-Exchange-good question in there may not be a CS question; it seems to me the user wants to write a Java program with lots of data and wants to know which class to use. That question would be for SO or programmers.SE.

If the question was "What data structure to use for lots of data?", we are a back to square one: the user has to specify the usage characteristics, otherwise we can't answer.

In short, I don't know what the OP wants. Until specified, this question should remain closed, imho.

Thanks for raising this. If you think you can make the quesiton good, please edit it accordingly!

I think that the SE-good question in there may not be a CS question; it seems to me the user wants to write a Java program with lots of data and wants to know which class to use. That question would be for SO or programmers.SE.

If the question was "What data structure to use for lots of data?", we are a back to square one: the user has to specify the usage characteristics, otherwise we can't answer.

In short, I don't know what the OP wants. Until specified, this question should remain closed, imho.

Thanks for raising this. If you think you can make the quesiton good, please edit it accordingly!

I think that the computer engineering-good question in there may not be a good CS question; it seems to me the user wants to write a Java program with lots of data and wants to know which class to use. That question would be for SO or programmers.SE.

If the question was "What data structure to use for lots of data?", we are a back to square one: the user has to specify the usage characteristics, otherwise we can't answer.

In short, I don't know what the OP wants. Until specified, this question should remain closed, imho.