Next value

static double nextAfter(double start, double direction): Returns the floating-point number adjacent to the first argument in the direction of the second argument.
static float nextAfter(float start, double direction): Returns the floating-point number adjacent to the first argument in the direction of the second argument.
static double nextUp(double d): Returns the floating-point value adjacent to d in the direction of positive infinity.
static float nextUp(float f): Returns the floating-point value adjacent to f in the direction of positive infinity.


public class Main {
  public static void main(String[] args) {

    System.out.println(Math.nextAfter(2,1.2));
    System.out.println(Math.nextUp(1.2));
  }
}

The output:


1.9999999
1.2000000000000002