Arraylist Output

Question

I have an String arraylist with the following content:

[0] = "ID: 12"
[1] = "Term: Banana"
[2] = "Definition = yellow fruit"
[3] = "ID: 14"
[4] = "Term: Apple"
[5] = "Definition = green fruit"
[6] = "Description = Beautiful fruit"
[7] = "ID: 16"
[8] = "Term: Melon"
[9] = "Definition = yellow fruit"

I only need the output from ID to the next ID.

For example:

Term: Apple
Definition = green fruit
Description = Beautiful fruit

How can I access it without specifying the exact location. I thought of contains("ID") until the next contains("ID"), I just don't know how to implement it.

Thank you very much for your help

By the looks of it your main problem is that saving your data in that structure (a list of strings) isn't a very good idea. Have you considered creating a custom class that holds all this data (ID, Term and definition) and working with objects of that class instead of just plain strings? — OH GOD SPIDERS, Dec 06 '21 at 14:49
Maybe you should consider taking the [tour]? (You get the _Informed_ badge after you do.) I see that your [other question](https://stackoverflow.com/questions/70185249/string-print-out-specific-rows) got a few down-votes. May be a good idea to read advice on [how to ask](https://stackoverflow.com/help/how-to-ask). — Abra, Dec 06 '21 at 14:58

score 0 · Answer 1 · answered Dec 06 '21 at 15:18

0

i thing you should use collection objects in the array instead of string as it is.it allows you to collect your desired data in the order you want.

answered Dec 06 '21 at 15:18

Asharudheen Mt

1
1

score 0 · Answer 2 · answered Dec 06 '21 at 16:09

If you do not need to print IDs, you can just filter them out by using String::startsWith:

List<String> data = Arrays.asList(
    "ID: 12", "Term: Banana", "Definition = yellow fruit",
    "ID: 14", "Term: Apple", "Definition = green fruit", "Description = Beautiful fruit",
    "ID: 16", "Term: Melon", "Definition = yellow fruit"
);

for (String item : data) {
    if (item != null && !item.startsWith("ID:")) {
        System.out.println(item);
    } else { // optionally print empty line to separate items
        System.out.println();
    }
}

Arraylist Output

2 Answers2