OutOfMemoryError while using File.list()

I'm facing OutOfMemoryError while using file.list(). Below is the description of the requirement
We have a directory structure of the following format -
**sourcedir\<date folders>\No Retry\<reason folders>\..\..\....\<*.ini files>**
sourcedir will be passed as argument to the program. The directories present in between "<>" can be in multiples of 10. The *.ini files can be in multiple of lacs in each directory.
The program is required to browse through the directory structure and look for *.ini files. The *.ini files are parsed for some data which needs to be stored in data base. We are using "File.list()" to load the name of files and FileFilter to find *.ini" files. As the number of files are huge the program is throwing OutOfMemoryError. We have increased heap space, it solved the problem. But we are looking for a solution which will not throw this error in future as the number of files may increase.
Can you please suggest us a technique to solve this permanently as we are beginners to java.

I suggest you try using a memory profiler to see where your memory is being used.
The problem you suggest shouldn't consume so much memory.

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