Read multiples files with same extension

how to read multiples files with same extension in java.
for ex : i would like to read all .DAT files from C drive using java.
How is it done

- You create the filter
- You get the list of files
- You open and read each file.
For the first two above you look at java.io.File and listFiles(FileFilter filter).
For the third you find whatever input stream is appropriate from java.io.*

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