Java Invalid Assignment Operator

Question

I'm trying to use the method references of Java 8. However, Eclipse says I'm using an invalid assignment operator instead of accepting the reference. I do not realize what my mistake is. Thanks!

public static void printAlumnes(Curs curs)
{
    String string = alumnesLlista.values().stream()

    .filter(alumne -> alumne.getCurs().equals(curs))
    .map(Alumne::toString())
    .sorted()
    .collect(Collectors.joining(" ; "));

.map(Alumne::toString)

Eran
– Eran

2018-10-29 08:53:58 +00:00
Commented Oct 29, 2018 at 8:53 — Eran
– Eran, Commented Oct 29, 2018 at 8:53

Michael · Accepted Answer · 2018-10-29 08:54:55Z

5

Alumne::toString() is not valid syntax for a method reference. It should be Alumne::toString (i.e. no parentheses)

answered Oct 29, 2018 at 8:54

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Michael

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