clear() throws java.lang.UnsupportedOperationException: remove

[maxim5]

Create a map and call .clear():

java.lang.UnsupportedOperationException: remove

	at java.base/java.util.Iterator.remove(Iterator.java:102)
	at java.base/java.util.AbstractCollection.clear(AbstractCollection.java:431)
	at java.base/java.util.AbstractMap.clear(AbstractMap.java:297)

[sanastas]

Indeed those optional APIs are not yet implemented. They are on the TODO list. Meanwhile instead of Iterator.remove() it is possible to use an iterator and invoke remove() on relevant key-value mapping. For clear() there is no good alternative. Using close() and building again will release the entire off-heap memory and allocate again.