Java BitSet.clear() is a method in the Java BitSet class that sets all bits in the bit set to false, effectively clearing its contents. This method is commonly used for resetting a bitset after it has been used for flagging or tracking purposes. Introduced in Java 1997 with Java 1.2, clear() is useful for efficiently managing large sets of binary data or flags in applications like cryptography, data compression, and optimization problems.

https://docs.oracle.com/javase/8/docs/api/java/util/BitSet.html