import java.util.HashMap;
import java.util.Map;
public class MyParam {
?private MyParam() {
?}
?private static Map usrParamMap = new HashMap();
?private static MyParam instance = new MyParam();
?public static MyParam getInstance() {
??return instance;
?}
?public String getParam(String usrId) {
??return usrParamMap.get(usrId).toString();
?}
?public void putParam(String usrId, String param) {
??usrParamMap.put(usrId, param);
?}
}