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How to add on last string comma in list?

I have this part of code:

 if (CollectionUtils.isNotEmpty(itemAttValues)) {
            return String.join(";", itemAttValues);
        }

and i get this : 9000;9001 but what i want is 9000;9001; so on last string to add ; also.

Any suggestion?

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Answer

I don’t know if you are working with an array or a ArrayList/List.

For an array:

if (CollectionUtils.isNotEmpty(itemAttValues)) {
    if (intemAttVallues.legnth != 1) {
        return String.join(";", itemAttValues) + ";";
       }
    return itemAttValues[0] + ";";
    }

For a ArrayList/List:

if (CollectionUtils.isNotEmpty(itemAttValues)) {
    if (intemAttVallues.size() != 1) {
        return = String.join(";", itemAttValues) + ";";
       }
    return itemAttValues.get(0) + ";";
    }
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