স্ট্রিংইউটিল

public StringUtil ()

public static String expand (String str, 
                 valueMap)

Map<String, String> valueMap = new HashMap<>() {
   put("FOO", "trade");
   put("BAR", "federation");
 };
 String str = StringUtil.expand("${FOO}.${BAR}", valueMap);
 assert str.equals("trade.federation");