java answers

This a list of problems in the Java file, in order of importance (the biggest problems are on top):

• it's not really a class, but a collection of utility procedures (see)
• it is doing two many things at the same time: saving, loading, filtering
• the class is not thread-safe, despite the promise in JavaDoc
• there is an obvious code duplication in getContent* methods
• unicode filtering is done wrong, will break the content instead of filtering it
• variable names are very short and non-informative
• string concatenation is very ineffective in terms of performance
• while ((data = i.read()) > 0) is a bad style, should be while (true) and then break inside
• input stream and output stream are not buffered
• both streams are not closed after use
• all non-modifiable variables should be final
• i += 1 is not the best method of variable increment
• file is not prepended with this.

If you miss all three problems listed at the top, we won't work with you.