# Class: com.pnfsoftware.jeb.util.concurrent.WeakConcurrentSet A thread\-safe set with weak values. Entries are based on a key's system hash code and keys are considered equal only by reference equality. This class does not implement the [java.util.Set](java.util.Set) interface because this implementation is incompatible with the set contract. While iterating over a set's entries, any value that has not passed iteration is referenced non\-weakly. ## Constructor: WeakConcurrentSet - parameter: `cleaner`, type: `com.pnfsoftware.jeb.util.concurrent.WeakConcurrentSet.Cleaner` Description: Create a weak\-value concurrent set. parameter: cleaner: cleanup strategy for stale entries ## Method: add - parameter: `value`, type: `V` - return type: `boolean` Description: parameter: value: The value to add to the set. return: `true` if the value was added to the set and was not contained before. ## Method: approximateSize - return type: `int` Description: Returns the approximate size of this set where the returned number is at least as big as the actual number of entries. return: the approximate size of this set ## Method: clear Description: Clears the set. ## Method: contains - parameter: `value`, type: `V` - return type: `boolean` Description: parameter: value: The value to check if it is contained in the set. return: `true` if the set contains the value. ## Method: expungeStaleEntries Description: Cleans all unused references. ## Method: getCleanerThread - return type: `java.lang.Thread` Description: return: The cleaner thread or `null` if no such thread was set. ## Method: iterator - return type: `java.util.Iterator` Description: Iterate over live values. return: an iterator over values that have not been collected ## Method: remove - parameter: `value`, type: `V` - return type: `boolean` Description: parameter: value: The value to remove from the set. return: `true` if the value is contained in the set. ## Method: run Description: Run the underlying cleaner loop until interrupted.