c_4_1_using_variables_in_lambdas

🧠 4.1 Using Variables in Lambdas

• A variable is effectively final if it is not modified after initialisation in the local block. Effectively final variables can use therse variables inside a lambda expression

• How many effectively final local cariables can you find in this example:

interface Gorilla { String move(); }
class GorillaFamily {
    String walk = "walk";
    void everyonePlay(boolean baby) {
        String approach = "amble";
        // approach = "run";

        play(() -> walk);
        play(() -> baby ? "hitch a ride":"run");    // line 9
        play(() -> approach);
    }
    void play(Gorilla g) {
        System.out.println(g.move());
    }
}