Tag: java

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.

• Dynamic Columns in JSP Model with Struts Framework

  18 Apr, 2010

  A design pattern for implementing dynamic, user-configurable column layouts in JSP applications using Apache Struts, leveraging a singleton class to store per-user column preferences in the servlet container's Application Context.

• 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.

• Recursive File Tree Traversing in Java

  26 Oct, 2009

  Recursive file tree traversal in Java using NIO.2's FileVisitor and SimpleFileVisitor interfaces, including pattern-based file searching with PathMatcher, symbolic link handling via FileVisitOption, and traversal control through FileVisitResult.

• 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.

• Monitor a Directory for Changes using Java

  17 Oct, 2009

  Monitoring a directory for file system changes using Java NIO.2 WatchService API introduced in JDK 7, offering a more efficient alternative to manual polling threads.