BetterLambdaThrow.java

@FunctionalInterface interface BetterRunnable<E extends Throwable> {
	void run() throws E;
}

public class BetterLambdaThrow {
	static <E extends Throwable> void runTwice(BetterRunnable<E> r) throws E {
		r.run();
		r.run();
	}

	public static void main(String[] args) {
		runTwice(() -> System.out.println("Hello, World!"));
		try {
			runTwice(() -> {throw new java.io.IOException();});
		} catch (java.io.IOException e) {
			System.out.println("caught");
		}
	}
}