Name:{[A-z][0-9]}
Phone:{[0-9]}

(0) [Name:]
(1) [Phone:]

(0) [[A-z][0-9]]
(1) [[0-9]]

Map<String, String> regexesByName = new LinkedHashMap<>();
for (String line : linesFromFile) {
  int index = line.indexOf(':');
  if (index < 0) {
    throw new IllegalArgumentException("Cannot parse: " + line);
  }
  String name = line.substring(0, index);
  String regex = line.substring(index + 1);
  regexesByName.put(name, regex);
}

for (Map.Entry<String, String> entry : regexesByName.entrySet()) {
  // entry.getKey() is the name, entry.getValue() is the regex
}

String regex = regexesByName.get(name);

Map<String, Pattern> compiledRegexesByName = new LinkedHashMap<>();
for (Map.Entry<String, String> entry : regexesByName.entrySet()) {
  compiledRegexesByName.put(
      entry.getKey(), Pattern.compile(entry.getValue()));
}