Java Double isNaN method : Double « Data Type « Java Tutorial

1. Java Tutorial
2. Data Type
3. Double

public class Main {

  public static void main(String[] args) {
    double d = Math.sqrt(-10);
    boolean b1 = Double.isNaN(d);

    System.out.println(b1);

    Double dObj = new Double(d);
    boolean b2 = dObj.isNaN();
    System.out.println(b2);

  }

}