Why do lambda expressions throw an error?

Question

Java

Good afternoon!
I have a strange reaction to lambda expressions in my NetBeans environment.

JDK 1.8.0
What could be wrong? Where do I slow down?

Answer 1

Because you can’t just take and write a lambda)) like any other expression.
Try like this for example:

class Foo {
    public static void main(String[] args) {
        Runnable r = () -> System.out.println("Hello world!!");
    }
}