How to get digital meter reading?

how can i get the exact reading from a digital meter in my java program can any help me or give me any suggestion about it??

If the meter is part of your Java code then you need to ask the question in a Java forum.

...R

You may also need to consult the manual for your meter.

You didn't say what kind of "meter" this is, or if it even has any kind of external connection.