Java 6 Illuminated: An Active Learning Approach, 2nd Edition

11.5 Programming Activity 1: Reading from a Structured Text File 779

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Begin with a checkbook balance of 0.00.

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To process the transactions, you will need to read one line at a time

from the transactions.txt file and parse the String that you retrieve.You

can use the StringTokenizer class for this. The delimiter will be a colon.

Then process the transaction; you do not need to check the type of

transaction. Just add the amount of the transaction to the checkbook

balance. Adding a negative transaction amount will decrease the bal-

ance, as expected. Be sure to use try/catch blocks where appropriate.

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After you have processed each transaction, call the ...