Web Reference: Mar 26, 2026 · HashSet in Java implements the Set interface of the Collections Framework. It is used to store the unique elements, and it doesn't maintain any specific order of elements. This Java Programming Tutorial is an introduction to HashSet Collection. In this tutorial, I provide Java code examples within Eclipse to explain the HashSet class and how a HashSet... From Java 10, you can use the var keyword to declare a HashSet variable without writing the type twice. The compiler figures out the type from the value you assign.
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