How to open directory in run time using java

Hi All
i hava problem for open a directory in run time in java.please help me with code.

Please elaborate what you mean by opening a directory. You can at all times access directory content via the File class.
File myDir=new File(<pathToDir>);
File[] directoryContent=myDir.listFiles();

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well....the issue is,by the above mentioned code,I m able to open all text files like .txt or .doc....but I want to open a file having an extension .eprt or .easm.....these are all drawing related files....how to do that?
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[url http://www.javaworld.com/jw-12-2000/jw-1229-dates.html]Calculating Java dates: Take the time to learn how to create and use dates
[url http://www.javaalmanac.com/egs/java.text/FormatDate.html]Formatting a Date Using a Custom Format

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How to open directory in run time using java

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