CIAO, How can I sort an ArrayList<K> of Generic Types ?

"Ciao" (Hi) to everyone,
please can you tell me how can I sort an ArrayList<K> of generic
types ?

If this arraylist were of this kind, ArrayList<String>, I could sort
it simply using this instruction:

ArrayList<String> list = new ArrayList<String>();
java.util.Collections.sort ( list );

but, in my case, i see that i cannot sort in this same way when i use
an arraylist of generic types.. like this one:

ArrayList<K> list = new ArrayList<K>();
/* ERROR --> */ java.util.Collections.sort ( list );


/* ERROR --> */ javac myProva.java
..\myIndexedTreeMap.java:46: cannot find symbol
symbol : method sort(java.util.ArrayList<K>)
location: class java.util.Collections
Collections.sort (list);
^
1 error

Thanks if you can give me any help for my question ?
Ciao
.

Relevant Pages