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Java.math.BigInteger.getLowestSetBit() Method
Description
The java.math.BigInteger.getLowestSetBit() returns the index of the rightmost (lowest-order) one bit in this BigInteger (the number of zero bits to the right of the rightmost one bit). It returns -1 if this BigInteger contains no one bits. It computes (this == 0? -1 : log2(this & -this)).
Declaration
Following is the declaration for java.math.BigInteger.getLowestSetBit() method.
public int getLowestSetBit()
Parameters
NA
Return Value
This method returns the index of the rightmost one bit in this BigInteger.
Exception
NA
Example
The following example shows the usage of math.BigInteger.getLowestSetBit() method.
package com.tutorialspoint; import java.math.*; public class BigIntegerDemo { public static void main(String[] args) { // create 2 BigInteger objects BigInteger bi1, bi2; // create 2 int objects int i1, i2; // assign values to bi1, bi2 bi1 = new BigInteger("8");//1000 bi2 = new BigInteger("7");//0111 // perform getLowestSetBit on bi1, bi2 i1 = bi1.getLowestSetBit(); i2 = bi2.getLowestSetBit(); String str1 = "Index of rightmost one bit in " +bi1+ " is " +i1; String str2 = "Index of rightmost one bit in " +bi2+ " is " +i2; // print i1, i2 values System.out.println( str1 ); System.out.println( str2 ); } }
Let us compile and run the above program, this will produce the following result −
Index of rightmost one bit in 8 is 3 Index of rightmost one bit in 7 is 0
java_math_biginteger.htm
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