- o
- element to be removed from this queue, if present
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Type Reason Java.Lang.ClassCastException if the class of the specified element is incompatible with this queue (optional) Java.Lang.NullPointerException if the specified element is null (optional)
Removes a single instance of the specified element from this queue, if it is present. More formally, removes an element e such that o.equals(e), if this queue contains one or more such elements. Returns true if this queue contained the specified element (or equivalently, if this queue changed as a result of the call).