Java.util.Collections
lastmod 2026-11-10created 2016-09-032 edits
java.util.Collections is a class in the Java Collections Framework that gathers static utility methods for working with collections. It provides algorithms such as sort, shuffle, reverse, and binarySearch, wrappers such as unmodifiableList and synchronizedMap, and constant collections such as emptyList. It is a different class from the Collection interface, so the names should not be confused.
Cheat sheet
Java_collection_cheat_sheet.png