Regex Tester & Validator

This regex is a lexer/tokenizer pattern designed to parse Java source code into individual tokens. It matches whitespace sequences, word characters (keywords/identifiers), specific punctuation like parentheses and semicolons, and common operators (1-2 characters) including arithmetic, comparison, and logical operators. It's commonly used in code editors, syntax highlighters, or static analysis tools to break Java code into meaningful lexical units.