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
• One-byte reading is ineffective, we should read to the memory buffer
• 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 the first three problems, we won't work with you.