<ul><li>The compareTo() method in Java is crucial for sorting and comparing objects, defining natural ordering based on a three-way comparison.</li><li>It is essential for sorting collections like lists and arrays, implementing logic based on object hierarchy, and filtering data in real-time applications.</li><li>Common usage includes comparing strings lexicographically and numbers when wrapped in their respective wrapper classes.</li><li>Implementing compareTo() in custom classes allows full control over the comparison criteria, ensuring consistency and avoiding issues.</li></ul>

Mastering compareTo() in Java: A Complete Guide with Examples

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