What methods are used to traverse elements within data collections?

In Java, several main methods are used to traverse collection elements:

1. For-each loop (enhanced for):

for (Element e : collection) {
    // process e
}

2. Iterator:

Iterator<Element> it = collection.iterator();
while (it.hasNext()) {
    Element e = it.next();
    // process e
}

3. Streams API:

collection.stream().forEach(e -> {
    // process e
});

4. Classic for loop — applicable to lists with indices:

for (int i = 0; i < list.size(); i++) {
    Element e = list.get(i);
    // process e
}

The choice of method depends on the type of collection and the task. Iterator allows safe removal of elements during traversal, streams are convenient for functional style and parallel processing.