Why is this not working in Java

Question

import java.util.function.Consumer;

public class test {
    public static void main(String[] args) {
        Consumer<String> c = (x) --> System.out.println(x.toLowerCase());
        c.accept("Java2s.com");
    }
}

with error:

Exception in thread "main" java.lang.Error: Unresolved compilation problems: x cannot be resolved to a variable x cannot be resolved at test.main(test.java:5)

But in all official documents, this is working... Could someone help me?

This has nothing to do with Eclipse and all to do with just Java and your using Java incorrect syntax. Never try to run uncompilable code. — Hovercraft Full Of Eels, Jan 02 '16 at 07:40

score 6 · Accepted Answer · answered Jan 02 '16 at 07:39

6

Change --> to -> and it should work. It would work only in java8 and later. It's a way to define lambda expression which would consume a string (in your case) and would change the case to lower.

answered Jan 02 '16 at 07:39

SMA

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Thank, but when i changed it, it also mention with the same error and told me i need to change -> to --> – Shadow Jan 03 '16 at 21:35

Why is this not working in Java

1 Answers1