WaitFor

package jdk8.byte_code;

class WaitFor {
    static void waitFor(Condition condition) throws    
    InterruptedException {
        while (!condition.isSatisfied())
            Thread.sleep(250);
    }

    static <T> void waitFor(T input, Predicate<T> predicate)
            throws InterruptedException {
        while (!predicate.test(input))
            Thread.sleep(250);
    }
}