How to use "toHexString"?

[lauren bai]

I create a class as follows:

class DoubletoHexString {

public static void main(String[] args) {

Double a = new Double(Double.NaN);

System.out.println("a: " + a.doubleValue());
System.out.println("doubletoHexString: " + Double.toHexString(a.doubleValue()));
}
}

I got compile error
DoubletoHexString.java:8: cannot resolve symbol
symbol : method toHexString (double)
location: class java.lang.Double
System.out.println("doubletoHexString: " + Double.toHexString(a.doubleValue()));

I check my spelling is correct. Can anybody tell why it's not correct?
[ April 14, 2005: Message edited by: lauren bai ]

[marc weber]

The code is correct. In Float and Double, the toHexString method is new with Java 1.5, so I'm guessing that you are using an earlier version compiler.

[lauren bai]

Hi,Marc, you are so right. I even didn't notice that.
I study 1.5 API but run on 1.4.