There are three variants of clear() method:
-
clear() : The clear() method sets all of the bits in this BitSet to false.
public void clear() Return Value This method does not return a value.
// Java code to demonstrate the working
// of clear() in BitSet
import
java.util.*;
public
class
BitClr1 {
public
static
void
main(String[] args)
{
// Declaring Bitset
BitSet bset =
new
BitSet(
8
);
// assigning values to bitset
for
(
int
i =
0
; i <
5
; i++)
bset.set(i);
// printing original bitset
System.out.println
(
"The bitset before clear() operation is : "
+ bset);
// using clear() to clear contents of bitset
bset.clear();
// printing bitset after clear() operation
// empty bitset
System.out.println
(
"The bitset after clear() operation is : "
+ bset);
}
}
Output:
The bitset before clear() operation is : {0, 1, 2, 3, 4} The bitset after clear() operation is : {}
-
clear(int pos) : The clear(int pos) method sets the bit specified by the index to false. i.e removes from bitset.
public void clear(int pos) Parameters pos : the index of the bit to be cleared. Return Value This method does not return a value. Exception IndexOutOfBoundsException : if the specified index is negative.
// Java code to demonstrate the working
// of clear(int pos) in BitSet
import
java.util.*;
public
class
BitClr2 {
public
static
void
main(String[] args)
{
// Declaring Bitset
BitSet bset =
new
BitSet(
8
);
// assigning values to bitset
for
(
int
i =
0
; i <
5
; i++)
bset.set(i);
// printing original bitset
System.out.println
(
"The bitset before clear(pos) operation is : "
+ bset);
// using clear(pos) to clear element at specified position
bset.clear(
3
);
// printing bitset after clear(pos) operation
// removes 3
System.out.println
(
"The bitset after clear(pos) operation is : "
+ bset);
}
}
Output:
The bitset before clear(pos) operation is : {0, 1, 2, 3, 4} The bitset after clear(pos) operation is : {0, 1, 2, 4}
-
clear(int frompos, int topos) : The clear(int frompos, int topos) method sets the bits from the specified frompos (inclusive) to the specified topos (exclusive) to false i.e performs removal in a range.
public void clear(int frompos, int topos) Parameters frompos : index of the first bit to be cleared topos : index of the last bit to be cleared Return Value This method does not return a value. Exception IndexOutOfBoundsException: if frompos is negative, or topos is negative, or frompos is larger than topos.
// Java code to demonstrate the working
// of clear(int frompos, int topos) in BitSet
import
java.util.*;
public
class
BitClr3 {
public
static
void
main(String[] args)
{
// Declaring Bitset
BitSet bset =
new
BitSet(
8
);
// assigning values to bitset
for
(
int
i =
0
; i <
5
; i++)
bset.set(i);
// printing original bitset
System.out.println
(
"The bitset before clear(frompos, topos) operation is : "
+ bset);
// using clear(frompos, topos) to clear elements in range
bset.clear(
2
,
4
);
// printing bitset after clear(frompos, topos) operation
// removes 2, 3
System.out.println
(
"The bitset after clear(frompos, topos) operation is : "
+ bset);
}
}
Output:
The bitset before clear(frompos, topos) operation is : {0, 1, 2, 3, 4} The bitset after clear(frompos, topos) operation is : {0, 1, 4}