Unset nth bit of a number

We can unset nth bit by using <<, ~ and & operators.

public class UnsetNthBit {

 public static int unsetNthBit(int num, int n) {
  num = num & ~(1 << n);
  return num;
 }
}

Following is the junit test case for above program.

import static org.junit.Assert.assertEquals;

import org.junit.Test;

public class UnsetNthBitTest {

 @Test
 public void test1() {
  assertEquals(UnsetNthBit.unsetNthBit(85, 0), 84);
  assertEquals(UnsetNthBit.unsetNthBit(84, 2), 80);
  assertEquals(UnsetNthBit.unsetNthBit(80, 4), 64);
 }
}