t)" title="class or interface in java.util" class="external-link">equals</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Set.html#hashCode()" title="class or interface in java.util" class="external-link">hashCode</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Set.html#isEmpty()" title="class or interface in java.util" class="external-link">isEmpty</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Se