NaN values are non-ordinal for comparisons. : float « Java Source And Data Type « SCJP

1. SCJP
2. Java Source And Data Type
3. float

public class MainClass {
  public static void main(String[] argv) {
    float x = 1.123F;

    System.out.println(x < Float.NaN);
    System.out.println(x <= Float.NaN);
    System.out.println(x == Float.NaN);
    System.out.println(x > Float.NaN);
    System.out.println(x >= Float.NaN);

    System.out.println(Float.NaN == Float.NaN);
    System.out.println(Float.NaN != Float.NaN);

  }
}