[Please see evaluation also]

Static Method longBitsToDouble(long bits) from Class Double returns wrong values
when bits is 0x7f80000000000000L and 0xff80000000000000L return should be Infinity and -Infinity. Run following code to reproduce problem

’ž†

public class LongToDouble {

  public static void main(String[] argv) {

    double d;
    // Test For Infinity
    d = Double.longBitsToDouble(0x7f80000000000000L);
    if ( Double.isInfinite(d))
      System.out.println("Test Passed for Infinity: " + Double.toString(d));
    else
      System.out.println("Test Failed for Infinity: " + Double.toString(d));

    // Test For -Infinity
    d = Double.longBitsToDouble(0xff80000000000000L);
    if ( Double.isInfinite(d))
      System.out.println("Test Passed for Infinity: " + Double.toString(d));
    else
      System.out.println("Test Failed for Infinity: " + Double.toString(d));
  }
}