How the two list traversal output

Question

    List<String> list1=new ArrayList<String>();
    list1.add("1");
    list1.add("2");
    list1.add("3");
    list1.add("4");
    List<String> list2=new ArrayList<String>();
    list2.add("5");
    list2.add("6");
    list2.add("7");
    list2.add("8");

//How the two list traversal output 1 5 2 6 3 7 4 8

And what would you want to happen if the lists had different lengths? — Jon Skeet, May 07 '19 at 09:30
Possible answer in: https://stackoverflow.com/questions/31963297/how-to-zip-two-java-lists — mate00, May 07 '19 at 09:33
if the two lists have the same length always, so you can use for-loop and output the value of first list then the second one. — JHDev, May 07 '19 at 09:44
if the two lists have the same length always。 for (int i = 0; i < list1.size(); i++){ System.out.println(list1.get(i)); System.out.println(list2.get(i)); } // if the two list length not same。how to write? — kero99, May 07 '19 at 09:53

score 0 · Answer 1 · answered May 07 '19 at 10:05

Something like:

    List<String> list1=new ArrayList<String>();
    list1.add("1");
    list1.add("2");
    list1.add("3");
    list1.add("4");
    List<String> list2=new ArrayList<String>();
    list2.add("5");
    list2.add("6");
    list2.add("7");
    list2.add("8");
    list2.add("9");
    list2.add("10");
    int n = Math.max(list1.size(), list2.size());
    for (int i = 0; i < n; i++){ 
        if(list1.size()> i){
            System.out.println(list1.get(i));
        } 
        if(list2.size()> i){
            System.out.println(list2.get(i)); 
        }
    }

How the two list traversal output

1 Answers1