Java Tools Library

A collection of utility classes providing various text processing and mathematical calculations.

Overview

This project contains several utility classes that offer different functionalities:

• Text processing and search operations
• Mathematical calculations
• Word manipulation and validation

Classes

LongestWord

Finds the longest French word that can be constructed from a given set of characters.

Features:

• Case-insensitive character matching
• Pre-defined list of French words
• Optional return type for safe handling

Usage Example:

String characters = "abcd";
Optional<String> longestWord = extractLongestWord(characters);
if (longestWord.isPresent()) {
    logger.info("The longest word is: " + longestWord.get());
} else {
    logger.info("No word found.");
}

FindKeyWord

Finds all occurrences of a given keyword within a specified text.

Features:

• Case-insensitive keyword searching
• Accent and diacritical mark normalization
• Multiple occurrence detection
• Returns list of starting indices
• Support for French text processing

Usage Example:

String keyword1 = "ali";
String text1 = "Alice aux pays des merveilles et ali baba";
logger.log(Level.INFO, FOLLOWING_INDICES, 
           new Object[]{keyword1, text1, findOccurrences(text1, keyword1)});

FactorialCalculator

Calculates the factorial of a given integer n (0 <= n <= 100).

Features:

• Supports calculation of factorials for numbers 0 to 100
• Uses BigInteger for precise large number calculations
• Input validation with IllegalArgumentException
• Recursive implementation
• Thread-safe calculation

Usage Example:

try {
    int n = 10;
    BigInteger factorialResult = factorial(n);
    logger.log(Level.INFO, "The factorial of {0} is : {1}", 
                    new Object[]{n, factorialResult});
} catch (IllegalArgumentException e) {
    logger.severe(e.getMessage());
}