Tag: bytecode

Articles

• Java Bytecode Manipulation

  9 Apr, 2017

  Statically analyze and programmatically modify compiled .class files without decompilation. Covers a practical example of changing a bytecode equality operator to alter program behavior, along with additional capabilities like method injection and code insertion.

• Java String Concatenation and Performance

  8 Nov, 2009

  Performance comparison of Java string concatenation methods — the + operator, String.concat(), StringBuffer.append(), and StringBuilder.append() through benchmarking with Perf4J and bytecode analysis.

• Dynamically Load Compiled Java Class

  21 Oct, 2009

  Dynamically load and execute compiled Java classes from byte array using a custom ClassLoader, without writing physical class files to disk. Highlights use cases like license validation, encrypted class delivery, and secure remote code execution.