Question

I create a implementation of a list, so I want to pass it to a stringbuffer variable, this can be possible or not if it is possible can someone give me an example. thank you

Answer 1

Not sure what exactly you try to do there but you can append things from a list to a StringBuffer for example like

public static void addToStringBuffer(StringBuffer buffer, List<?> list) {

    if (buffer == null || list == null)
        return;

    for (Object object : list) {
        buffer.append(object);
    }

}

or if you want them comma separated

public static void addToStringBuffer(StringBuffer buffer, List<?> list) {

    if (buffer == null || list == null)
        return;

    boolean addSeparator = false;

    for (Object object : list) {
        if (addSeparator) {
            buffer.append(", ");
        } else {
            addSeparator = true;
        }
        buffer.append(object);
    }

}

or use TextUtils#join

String result = TextUtils.join(", ", list);

but that’s not adding to a StringBuffer

And unless you need the synchronization of StringBuffer use StringBuilder