BitSet toLongArray() Method in Java with Examples
Last Updated :
27 Dec, 2018
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:
import java.util.*;
public class BitSet_Demo {
public static void main(String args[])
{
BitSet init_bitset = new BitSet();
init_bitset.set( 10 );
init_bitset.set( 20 );
init_bitset.set( 30 );
init_bitset.set( 40 );
init_bitset.set( 50 );
System.out.println( "BitSet: " + init_bitset);
long [] arr = init_bitset.toLongArray();
System.out.println( "The LongArray is: " + arr);
System.out.println( "The elements in the LongArray:" );
for ( int i = 0 ; i < arr.length; i++)
System.out.print(arr[i] + ", " );
}
}
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Output:
BitSet: {10, 20, 30, 40, 50}
The LongArray is: [J@232204a1
The elements in the LongArray:
1127000493261824,
Program 2:
import java.util.*;
public class BitSet_Demo {
public static void main(String args[])
{
BitSet init_bitset = new BitSet();
init_bitset.set( 48 );
init_bitset.set( 64 );
init_bitset.set( 15 );
init_bitset.set( 95 );
init_bitset.set( 105 );
init_bitset.set( 21 );
System.out.println( "BitSet: " + init_bitset);
long [] arr = init_bitset.toLongArray();
System.out.println( "The LongArray is: " + arr);
System.out.println( "The elements in the LongArray:" );
for ( int i = 0 ; i < arr.length; i++)
System.out.print(arr[i] + ", " );
}
}
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Output:
BitSet: {15, 21, 48, 64, 95, 105}
The LongArray is: [J@232204a1
The elements in the LongArray:
281474978840576, 2201170739201,
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