When I try:
LinkedList<String> stringList = new LinkedList<String>();
I get the following compilation error:
type LinkedList does not take parameters
What am I missing? Can't you do this?
views:
584answers:
3
+8
A:
Are you possibly compiling against a JDK 1.4 or earlier? Or do you have your language setting in your build or IDE set to pre-5.0 (so no generics support)?
By the way, the best way to do that is
List<String> stringList = new LinkedList<String>();
Use the interface rather than the implementation wherever possible.
That being said, assuming you're compiling against a JDK 5.0+, have your language settings set to Java 5+ and that is a java.util.LinkedList then your code is perfectly valid.
cletus
2009-08-02 00:38:51
Actually, the best way to do that is to use Google Collections :-)`List<String> stringList = Lists.newLinkedList();`
ChssPly76
2009-08-02 00:41:01
Hmm . . . I'm using JDK 7. I'll try compiling with JDK 6. I'd hate to say that I've found a bug in the compiler, but it isn't yet officially released, so it's possible.
FarmBoy
2009-08-02 00:55:42
Classic newbie mistake: "I've found a bug in the compiler." It might be possible, but it's vanishingly small compared to probability that you're the one who's made the mistake. Banish the thought - it'll be the best thing you learn from this episode
duffymo
2009-08-02 02:45:21
Open a command shell, type "java -version", and see what you get. That's the only way to be sure about the version you're using.
duffymo
2009-08-02 02:50:00
Also work out what your JAVA_HOME is. echo %JAVA_HOME% on Windows, typically echo $JAVA_HOME on Linux/Unix (at a command line).
cletus
2009-08-02 03:22:11
I'm a bit embarrassed to have publicly blamed the compiler. In any case, Mr. newacct guessed my problem.
FarmBoy
2009-08-03 09:53:44
+6
A:
Check to make sure you don't have a compiled class named LinkedList in the same directory. (Especially since "linked list" is a common term, and it is something that people often try to implement as beginners.) This is important if you import your classes using something like import java.util.*;, because the * imports on-demand, so if there is a class with the same name in the package already, then that class is used and the java.util.LinkedList is not imported.
newacct
2009-08-02 01:45:57
Or better yet, look at your imports and make sure you're actually importing java.util.LinkedList and not some other LinkedList
MatrixFrog
2009-08-02 04:05:54
You guessed it, good job.Just the other day, I had coded a simple LinkedList for practice, I shouldn't have forgotten so soon.
FarmBoy
2009-08-03 09:51:39
A:
Don't take the class name as " class LinkedList" instead you can take "class LinkedListDemo" and rest of the declaration "LinkedList(String> t= new LinkedList(String>(); " should be there and it will compile perfectly. Note: Please don't use '(' braket for (String> instead use only <>. I don't know there is some technical fault in writing and it is not acceppting'<' this bracket.
saheer
2010-01-08 11:54:36
When you type an answer, read the notes about using markdown. Then you will be able to type `LinkedList<String>` and view it correctly.In any case, thanks for your contribution.
FarmBoy
2010-01-12 03:40:04