For example, as a post-compilation step you could massage the .class data to make the byte code either harder to read when decompiled or harder to decompile into valid Java code (or both).

Here's my problem: I need to scan through the byte array returned by decrypting a .pdf and replace some hard-coded values in the file before sending it along to a servlet response.In Perl this is ...

The Java input/output (I/O) facilities provide a simple, standardized API for reading and writing character and byte data from various data sources. This article explores the I/O classes ...