/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		int a = 0b11111;
 
        System.out.println(Integer.toBinaryString(flipBit(a, 2)));
	}
 
	 public static int flipBit(int value, int bitIndex) {
        int mask = 0b1 << bitIndex - 1;
        int result = value ^ mask;
 
        return result;
    }
}

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