Some JDK 1.5 features dont work in JDeveloper 10g (10.1.3) EA IDE

Question

for example, the following error message is produced when i try to compile code bellow :
Error(7,24): method range(client.Color, client.Color) not found in class java.util.EnumSet
this is what my code look like:
package client;
import java.util.EnumSet;
public class TestClass {
public static void main(String[] args) {
for( Color c : EnumSet.range(Color.GREEN, Color.BLUE) )
System.out.println( c );
and my Color enum that resides in a seperate file look like this....
package client;
public enum Color { RED, GREEN, BLUE }
thank you

Answer 1

following code still has 2 problems...
package mypackage;
import java.util.EnumSet;
public enum Color {RED, GREEN, BLUE, ;}
public class TestClass {   
public static void main(String[] args) {       
for (Color c : EnumSet.range(Color.GREEN, Color.BLUE))
System.out.println(c);
problems are:
1) enum Color is public so it can not reside in the same file
2) the line containing EnumSet.range method still don't compile
I soleved the 1st problem by making enum Color non-public & moving the enum to the inside of the TestClass but it still didn't help my original problem unable to compile the line containing EnumSet.range method.