HashSet是覆盖元素还是保持不变?

When working with Java's HashSet, many developers often find themselves in a conundrum when it comes to understanding how the collection handles duplicate elements. Specifically, there appears to...

Java的HashSet不允许重复元素,add()方法在添加重复元素时不会覆盖旧元素,而是返回false,保持集合不变,从而确保唯一性。

HashSet是覆盖元素还是保持不变?
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