In Java, how to traverse two lists at the same time?

Question

E.g.

for(String str : list1) {
...
}

for(String str : list2) {
...
}

suppose we are sure that list1.size() equals list2

Answer 1

int index = 0;
for(String str1 : list1) {
    str2 = list2.get(index++);
}