How to format message with argument names instead of numbers?

You can use MapFormat for this. Find out the details here:

http://www.java2s.com/Code/Java/I18N/AtextformatsimilartoMessageFormatbutusingstringratherthannumerickeys.htm

String text = "The user {name} has email address {email}.";
Map map = new HashMap();
map.put("name", "Robert");
map.put("email", "[email protected]");

System.out.println("1st : " + MapFormat.format(text, map));

OUTPUT:

1st : The user Robert has email address [email protected].

See StrSubstitutor from org.apache.commons.lang3:

Map valuesMap = HashMap();
valuesMap.put("animal", "quick brown fox");
valuesMap.put("target", "lazy dog");
String templateString = "The ${animal} jumped over the ${target}.";
StrSubstitutor sub = new StrSubstitutor(valuesMap);
String resolvedString = sub.replace(templateString);

// resolvedString: "The quick brown fox jumped over the lazy dog."