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Bitset is a common base class for mutable and immutable bitsets. Bitsets are sets of non-negative integers and are represented as variable-size arrays of bits packed into 64-bit words. The memory footprint of a bitset is represented by the largest number stored in it.
Declaring BitSet Variables
The following is the syntax for declaring an BitSet variable.
Syntax
var z : BitSet = BitSet(0,1,2)
Here, z is declared as an bit-set of non-negative integers which has three members. Values can be added by using commands like the following −
Command
var myList1: BitSet = myList + 3;
Processing BitSet
Below is an example program of showing how to create, initialize and process BitSet −
Example
import scala.collection.immutable.BitSet object Demo { def main(args: Array[String]) = { var mySet: BitSet = BitSet(0, 1, 2); // Add an element var mySet1: BitSet = mySet + 3; // Remove an element var mySet2: BitSet = mySet - 2; var mySet3: BitSet = BitSet(4, 5); // Adding sets var mySet4: BitSet = mySet1 ++ mySet3; println(mySet); println(mySet1); println(mySet2); println(mySet4); } }
Save the above program in Demo.scala. The following commands are used to compile and execute this program.
Command
>scalac Demo.scala >scala Demo
Output
BitSet(0, 1, 2) BitSet(0, 1, 2, 3) BitSet(0, 1) BitSet(0, 1, 2, 3, 4, 5)
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