Description Maximiliano Sanchez de Bustamante 2005-02-02 13:45:19 EST

I'am following the generic's tutorial of "Generics in the Java Programming
Language" downloaded fro mthe sun website. When I write the code to use the
lower bound wildcard, the compiler give me an error in the calling to writeAll
method. the error is:

The method writeAll(Collection<T>, Sink<? super T>) in the type Test is not
applicable for the arguments (Collection<String>, Sink<Object>)

If I compile it outside eclipse, with javac, works well, and execute fine. I use
JDK 1.5.0_01. I define JDK 1.5.0_01 like my default installed JRE, and set
compiler compatibility to 5.0
I send you the class code.

public class Test {

    private <T> T writeAll(Collection<T> coll, Sink<? super T> snk) { 
        T last = null;
        for (T t : coll) { 
            last = t;
            snk.flush(last);
        }
        return last;
    }

    public void test1() {
        Sink<Object> s = new SimpleSinkImpl<Object>();
        Collection<String> cs = new ArrayList<String>();
        cs.add("hello!");
        cs.add("goodbye");
        cs.add("see you");
        
        String str = this.writeAll(cs, s);  
    }

    public static void main(String[] args) {
        Test test = new Test();
        
        test.test1();
    }