Comparing Strings

I have 3 String Lists, they all have 4 strings in them. I wanna compare all the lists to each other and find all the strings that are shared, and return them whether only 2 of the lists share them or all 3, or if there's multiple strings they share.

Here's the list

Code:java

String[] ing1 = { inv.getItem(0).getItemMeta().getLore().get(0), inv.getItem(0).getItemMeta().getLore().get(1), inv.getItem(0).getItemMeta().getLore().get(2), inv.getItem(0).getItemMeta().getLore().get(3) };
            String[] ing2 = { inv.getItem(1).getItemMeta().getLore().get(0), inv.getItem(1).getItemMeta().getLore().get(1), inv.getItem(1).getItemMeta().getLore().get(2), inv.getItem(1).getItemMeta().getLore().get(3) };
            String[] ing3 = { inv.getItem(2).getItemMeta().getLore().get(0), inv.getItem(2).getItemMeta().getLore().get(1), inv.getItem(2).getItemMeta().getLore().get(2), inv.getItem(2).getItemMeta().getLore().get(3) };

 

Here's one way to do it using a Map. Tailor it to your needs.

Code

Code:

/* initialize */
String[] sa1 = { "a", "b", "c" };
String[] sa2 = { "a", "c", "d", "e", "f" };
String[] sa3 = { "c", "g", "h", "i" };
 
Map<String, Integer> counts = new HashMap<String, Integer>();
 
/* add */
for (String s : sa1) { counts.put(s, 1+(counts.containsKey(s) ? counts.get(s) : 0)); }
for (String s : sa2) { counts.put(s, 1+(counts.containsKey(s) ? counts.get(s) : 0)); }
for (String s : sa3) { counts.put(s, 1+(counts.containsKey(s) ? counts.get(s) : 0)); }
 
/* show matches */
for (Entry<String, Integer> entry : counts.entrySet()) {
    if (entry.getValue() > 1) {
        System.out.println(entry.getKey() + " : " + entry.getValue());
    }
}

Output

Code:

c : 3
a : 2

 

Thank you, this looks like its exactly what I need. I'll mess with it and see if I can make use out of it.