BitSet.PreviousSetBit(Int32) Method

Reference

Definition

Namespace:: Java.Util

Assembly:: Mono.Android.dll

Important

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Returns the index of the nearest bit that is set to true that occurs on or before the specified starting index.

[Android.Runtime.Register("previousSetBit", "(I)I", "GetPreviousSetBit_IHandler")]
public virtual int PreviousSetBit (int fromIndex);

[<Android.Runtime.Register("previousSetBit", "(I)I", "GetPreviousSetBit_IHandler")>]
abstract member PreviousSetBit : int -> int
override this.PreviousSetBit : int -> int

Parameters

fromIndex: Int32

the index to start checking from (inclusive)

Returns

Int32

the index of the previous set bit, or -1 if there is no such bit

Attributes: RegisterAttribute

Exceptions

IndexOutOfBoundsException

if index .

Remarks

Returns the index of the nearest bit that is set to true that occurs on or before the specified starting index. If no such bit exists, or if -1 is given as the starting index, then -1 is returned.

To iterate over the true bits in a BitSet, use the following loop:

{@code
            for (int i = bs.length(); (i = bs.previousSetBit(i-1)) >= 0; ) {
                // operate on index i here
            }}

Added in 1.7.

Java documentation for java.util.BitSet.previousSetBit(.*int).

Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.

Applies to