Java BitSet toLongArray() method
The toLongArray() method of Java
BitSet
class returns a new long array which contains all the bits of this bit set.
This method works on the basis of following algorithm:
long[] longs = bitset.toLongArray();
then longs.length == (bitset.length()+63)/64 and
bitset.get(n) == ((longs[n/64] & (1L<
for all n < 64 * longs.length.
Syntax:
public long[] toLongArray()
Parameter:
Returns:
This method returns a long array which contains all the bits of this bit set.
Exception:
Compatibility Version:
Java 1.7 and above
Example 1
import java.util.BitSet;
public class BitSetToLongArrayExample1 {
public static void main(String[] args) {
BitSet bitset = new BitSet();
bitset.set(0);
bitset.set(1);
bitset.set(3);
bitset.set(5);
bitset.set(6);
System.out.println("bitset: "+bitset);
long[] lngArray = bitset.toLongArray();
System.out.println("byte array: "+lngArray[0]);
Test it Now
Output:
bitset: {0, 1, 3, 5, 6}
byte array: 107
Example 2
Each long array of the BitSet is set at the interval of each long bit space (64 bit). The length of a long bit space increases if the set bit is set above the previous long size.
In this example, the set bits from index 0 to 9 are placed in the first long bit space and the set bit from index 64 and 65 are placed at second long bit space.
import java.util.BitSet;
public class BitSetToLongArrayExample2 {
public static void main(String[] args) {
BitSet bitset = new BitSet();
bitset.set(0);
bitset.set(1);
bitset.set(3);
bitset.set(5);
bitset.set(6);
bitset.set(8);
bitset.set(9);
bitset.set(64);
bitset.set(65);
System.out.println("bitset: "+bitset);
long[] lngArray = bitset.toLongArray();
for(int i=0;i
Test it Now
Output:
bitset: {0, 1, 3, 5, 6, 8, 9, 64, 65}
byte array1 to long: 875
byte array2 to long: 3
Next TopicBitSet toString() Method
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