Code Snippets and Tips for Java

Java Classes

• Base64Coder: A Base64 encoder/decoder class
• LRUCache: An LRU cache class
• MiniConnectionPoolManager: A JDBC connection pool manager
• DecayingCounter: An exponentially time-decaying counter

Java Code Snippets

• Resize an array
• Parse an URL query string
• Decode a time value and add it to the current date
• Parse quoted strings with java.util.Scanner
• Encrypt 64-bit blocks with Blowfish

Java Applets

• "Station clock" applet (with anti-aliasing)

Java Tips

• How to run a Java Program as a daemon (service) on Linux (SUSE) using a shell script