BitSet toLongArray() Method in Java with Examples Last Updated : 27 Dec, 2018 Comments Improve Suggest changes Like Article Like Report The java.util.BitSet.toLongArray() is an inbuilt method of BitSet class that is used to produce a new long array containing all of the bits of the existing BitSet. As per the official documentation, this process works in the following way: if, long[] longs = bit_set.toLongArray(); then, longs.length == (bit_set.length()+63)/64 and, bit_set.get(n) == ((longs[n/64] & (1L<<(n%64))) != 0) for all n < 64 * longs.length Syntax: Bit_Set.toLongArray() Parameter: The method does not take any parameters. Return value: The method returns the set consisting of LongArray representation of the elements of the given BitSet. Below programs illustrate the working of java.util.BitSet.toLongArray() method: Program 1: Java // Java code to illustrate toLongArray() import java.util.*; public class BitSet_Demo { public static void main(String args[]) { // Creating an empty BitSet BitSet init_bitset = new BitSet(); // Use set() method to add elements into the Set init_bitset.set(10); init_bitset.set(20); init_bitset.set(30); init_bitset.set(40); init_bitset.set(50); // Displaying the BitSet System.out.println("BitSet: " + init_bitset); long[] arr = init_bitset.toLongArray(); System.out.println("The LongArray is: " + arr); // Displaying the byteArray System.out.println("The elements in the LongArray:"); for (int i = 0; i < arr.length; i++) System.out.print(arr[i] + ", "); } } Output: BitSet: {10, 20, 30, 40, 50} The LongArray is: [J@232204a1 The elements in the LongArray: 1127000493261824, Program 2: Java // Java code to illustrate toLongArray() import java.util.*; public class BitSet_Demo { public static void main(String args[]) { // Creating an empty BitSet BitSet init_bitset = new BitSet(); // Use set() method to add elements into the Set init_bitset.set(48); init_bitset.set(64); init_bitset.set(15); init_bitset.set(95); init_bitset.set(105); init_bitset.set(21); // Displaying the BitSet System.out.println("BitSet: " + init_bitset); long[] arr = init_bitset.toLongArray(); System.out.println("The LongArray is: " + arr); // Displaying the byteArray System.out.println("The elements in the LongArray:"); for (int i = 0; i < arr.length; i++) System.out.print(arr[i] + ", "); } } Output: BitSet: {15, 21, 48, 64, 95, 105} The LongArray is: [J@232204a1 The elements in the LongArray: 281474978840576, 2201170739201, Comment More infoAdvertise with us Next Article Introduction to Java C chinmoy lenka Follow Improve Article Tags : Misc Java Java - util package Java-Functions Java-BitSet +1 More Practice Tags : JavaMisc Similar Reads Java Tutorial Java is a high-level, object-oriented programming language used to build web apps, mobile applications, and enterprise software systems. 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