how to append a dynamic number to a variable name of string data type in java?

Question

   for(int i=0;i<counter;i++){
            String textbox+""i=request.getParameter("text1"+i); 
        }

i am trying to use variable name dynamically but it says that the left hand side assignment must be a variable.I don't know how to append this numbers to the variable name using double quotes ,i am a fresher to programming .

this `textbox+""i` is not an identifer – Ousmane D. Jun 16 '17 at 12:01 — Ousmane D., Jun 16 '17 at 12:01

score 0 · Answer 1 · answered Jun 16 '17 at 12:04

0

I think you should use an array o Strings:

String[] textbox = new String[counter];
for(int i=0;i<counter;i++)
{
  textbox[i]=request.getParameter("text1"+i); 
}

answered Jun 16 '17 at 12:04

storm87

49
1
5

score 0 · Answer 2 · answered Jun 16 '17 at 12:12

You can do the same with a Map like that, you'll be able to retrieve your parameters with their names, which can make more sense than just a List:

Map<String, Object> textbox = new HashMap<>();
for(int i=0;i<counter;i++) {
    String paramId = "text"+i;
    textbox.put(paramId, request.getParameter(paramId));
}

But please note this is kind of useless since the parameters in the request are already a Map. You can directly pass the map (using request.getParameterMap()) to your methods and use it later.

how to append a dynamic number to a variable name of string data type in java?

2 Answers2