Sorry, working code:
public class HundM
{
protected final static HashMap <String, String> hm = new HashMap <String, String> ();
public static String getValue (String param) {
return "VALUE_" + hm.get (param);
}
public static void main (String args[])
{
hm.put ("AAA", "ABC");
hm.put ("BBB", "DEF");
hm.put ("CCC", "GHI");
System.out.println (getValue ("BBB"));
}
}