OnJava8-Examples/functional/Closure8.java at master · CSapprenticeWT/OnJava8-Examples · GitHub

Repository navigation

// functional/Closure8.java

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

import java.util.*;

import java.util.function.*;

public class Closure8 {

Supplier<List<Integer>> makeFun() {

final List<Integer> ai = new ArrayList<>();

ai.add(1);

return () -> ai;

}

public static void main(String[] args) {

Closure8 c7 = new Closure8();

List<Integer>

l1 = c7.makeFun().get(),

l2 = c7.makeFun().get();

System.out.println(l1);

System.out.println(l2);

l1.add(42);

l2.add(96);

System.out.println(l1);

System.out.println(l2);

}

/* Output:

[1]

[1, 42]

[1, 96]