public static LongConsumer longConsumer(CheckedLongConsumer consumer, Consumer<Throwable> handler) {
        return l -> {
            try {
                consumer.accept(l);
            }
            catch (Throwable e) {
                handler.accept(e);

                throw new IllegalStateException("Exception handler must throw a RuntimeException", e);
            }
        };
    }
Wrap a {@link CheckedLongConsumer} in a {@link LongConsumer} with a custom handler for checked exceptions.
<p>
Example:
<pre><code>
Arrays.stream(new long[] { 1L, 2L }).forEach(Unchecked.longConsumer(
    l -> {
        if (l &lt; 0)
            throw new Exception("Only positive numbers allowed");
    },
    e -> {
        throw new IllegalStateException(e);
    }
));
</code></pre>
jOOL-java-8/src/main/java/org/jooq/lambda/Unchecked.java