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Is the counter++; statement ever executed? If not, then the value of counter will stay at 0.doesn't seem to be incrementing within the program
Add a call to println() next to that statement to see if it is ever executed.
You should use the equals() method to compare the contents of objects like Strings, not the == operator.
If you don't understand my answer, don't ignore it, ask a question.
javaiscool (February 8th, 2013)