static Method doubleToLongBits(double value) in class Double returns wrong results when value = Double.NaN and any Valid double. See Following test program

public class DoubleTest {

  public static void main(String[] argv) {

    long l;
    // Test For NaN
    l = Double.doubleToLongBits(Double.NaN);
    if ( l != 0x7ff8000000000000L)
      System.out.println("Test Failed for NaN");
    else
      System.out.println("Test Passed for NaN");

  }
}