What is BitSet.andNot() in Java?
Overview
andNot() is an instance method of the BitSet class that is used to clear all of the bits in the current BitSet object. The current BitSet object’s corresponding bit is set in the specified BitSet object.
Let’s say there are two BitSet objects. The bits at indexes 2 and 3 are set in the first object, and the bits at indexes 3 and 4 are set in the second object.
Invoking the method andNot() on the first object, while passing the second object, will modify the first object where the bit at index 2 is set, because the index 3 is the common set bit between the objects and it will be masked.
The andNot method is defined in the BitSet class. The BitSet class is defined in the java.util package. To import the BitSet class, use the following import statement.
import java.util.BitSet;
Syntax
public void andNot(BitSet set)
Parameters
BitSet set: TheBitSetobject with which to mask the currentBitSetobject.
Return value
This method does not return anything.
Code
import java.util.Arrays;import java.util.BitSet;public class Main{public static void main(String[] args) {// Create empty BitSet objectBitSet bitSet1 = new BitSet();// Set the bit at index 2bitSet1.set(2);// Set the bit at index 3bitSet1.set(3);// Create empty BitSet objectBitSet bitSet2 = new BitSet();// Set the bit at index 3bitSet2.set(3);// Set the bit at index 4bitSet2.set(4);// andNot operation on bitset1bitSet1.andNot(bitSet2);// print the result of the operationSystem.out.printf("%s.andNot(%s) = %s", bitSet1, bitSet2, bitSet1);}}
