How to Iterate through two ArrayLists Simultaneously? [duplicate]

Answer 1

java8 style:

private static  void iterateSimultaneously(Iterable c1, Iterable c2, BiConsumer consumer) {
    Iterator i1 = c1.iterator();
    Iterator i2 = c2.iterator();
    while (i1.hasNext() && i2.hasNext()) {
        consumer.accept(i1.next(), i2.next());
    }
}
//
iterateSimultaneously(category, cay_id, (JRadioButton b, Integer i) -> {
    // do stuff...
});