I have a problem with *reader.selectPages(String range);*

I read the PDF file like this:
try {
        reader = new PdfReader(new RandomAccessFileOrArray(filePath), null);
        reader.selectPages("1-20");
} catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
}

Pages Count: 20.

but if i call the *reader.selectPages(String range); AGAIN* without
instantiating
*reader = new PdfReader(new RandomAccessFileOrArray(filePath), null);* the
reader
will only read "fromPage" in *reader.selectPages("1-20");*.

Example of selectPages Again:

try {
        reader = new PdfReader(new RandomAccessFileOrArray(filePath), null);
        reader.selectPages("1-20");
        reader.selectPages("21-30");
} catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
}

Pages Count: 1.

I do not want to call *reader = new PdfReader(new
RandomAccessFileOrArray(filePath), null);*
because it reads the pdf again and it takes time.



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