Question

I have declared two string buffers like,

private StringBuffer buf = new StringBuffer(1024);
private StringBuffer bufRetro = new StringBuffer(1024);

on following code, before bufRetro = buf, buf has proper filled value. However, after copy it, both have no content. How to set one stringBuffer from another one? Thank you.

if(this.v_Id){

    buf.append(ch, start, length);

    if (bufType.equals(bufOld)){

        buf = bufRetro.append(buf);

    }

    myParsedXMLDataSet.setId(buf.toString());

    bufOld = bufType;

    bufRetro.delete(0, bufRetro.length());
    bufRetro = buf;

    Log.d("id", buf.toString());

    buf.delete(0, buf.length());

Answer 1

How to set one stringBuffer from another one?

How about

bufRetro.setLength(0);   // copy content from buf to bufRetro
bufRetro.append(buf);

buf.setLength(0);        // if you want to clear the original one.