Question

OK, I need a RegEx that traps the first word up to underscore character but then capture the next words that may have a underscore character. So, here is a group and the expected result:

gear_Armor_Blessed_Robes = "gear", "Armor" and "Blessed_Robes"
gear_Armor_Chain_Coif = "gear", "Armor" and "Chain_Coif"
gear_Armor_Chain_Hauberk = "gear", "Armor" and "Chain_Hauberk"
gear_Armor_Chain_Shirt = "gear", "Armor" and "Chain_Shirt"
gear_Armor_Chain_Leggings = "gear", "Armor" and "Chain_Leggings"

Answer 1

There’s no need to use a regex for this, just use indexOf and substring:

String s = "Armor_Blessed_Robes";
int idx = s.indexOf("_");
System.out.println(s.substring(0, idx)); // Armor
System.out.println(s.substring(idx + 1)); // Blessed_Robes

With regex, you’d have to use the following, which is a tad more complicated and harder to read:

Pattern p = Pattern.compile("([^_]+)_(.+)");
Matcher m = p.matcher(s);
if (m.find()) {
  String first = m.group(1);  // Armor
  String second = m.group(2); // Blessed_Robes
}