InputStreamReader: reads too much?

Question

i read text from an InputStreamReader:
int count;
char[] chars = new char[2048];
while ((count = isr.read(chars, 0, chars.length)) != -1) {
    textArea.append(new String(chars));
}and noticed that too much text is read! I i increase chars (e.g. 4096 bytes), more additional text is read. It seems, that the read() method for the last call does not clear 'chars' and therefore has additional (old) characters in the 'chars' buffer(?). how can this be avoided?
(note: I need to read from inputstreamreader, not e.g. from a BufferedReader, as ProgressMonitorInputStream can't be used with Readers.)

Answer 1

well, again: of course, it appends the complete array
chars[] but it doesn't clear the contents before each
read! a workaround would be:
int count;
char[] chars = new char[2048];
while ((count = isr.read(chars, 0, chars.length)) !=
-1) {
textArea.append(new String(chars));
chars = new char[2048]; //fix: clear content for
for next read
}to not have the content of the previous read in the
chars[] array. but this should be done by the read()
method in the first place.No, the approach should be -
int count;
char[] chars = new char[2048];
while ((count = isr.read(chars, 0, chars.length)) != -1) {
textArea.append(new String(chars, 0, count));
Roger