Simple example demonstrating how Java can close over (final) variables

ClosureExample.java

import java.util.ArrayList;
import java.util.List;

public class ClosureExample {
	public static void main(String[] args) {
		List<Runnable> actions = new ArrayList<>();

		for (int i = 0; i < 10; i++) {
			final int j = i;
			actions.add(new Runnable() {
				public void run() {
					System.out.println("Captured: " + j);
				}
			});
		}
		
		for (Runnable action : actions) {
			action.run();
		}
	}
}