Optionals.java

package main;

import java.util.Optional;

public class Optionals {

	public static void main(String[] args) {
//		String isItNull = isItNull();
//		if (isItNull != null) {
//			System.out.println(isItNull.length());
//		} else {
//			isisItNull = "piers is a weapon";
//		}
//		System.out.println(isItNull().length());
//		System.out.println(isItNull().length());
//		System.out.println(isItNull().length());
//		System.out.println(isItNull().length());
//		System.out.println(isItNull().length());

		for (int i = 0; i < 10; i++) {
			System.out.println(isItNull().get());
			System.out.println(isItNull().orElse("piers is a weapon"));
			System.out.println(isItNull().orElseThrow(() -> new RuntimeException()));
		}
	}

	private static Optional<String> isItNull() {
		String out = null;
		if (Math.random() > 0.5) {
			out = "optional";
		}
		return Optional.ofNullable(out);
	}

//	private static String isItNull() {
//		String out = null;
//		if (Math.random() > 0.5) {
//			out = "optional";
//		}
//		return out;
//	}
}