Why does initializing a final String to args[0] throw an ArrayIndexOutOBoundsException?

Asked Apr 15 '20 at 08:36

Active Apr 15 '20 at 08:40

Viewed 14 times

I'm learning to read File Properties of MS Office documents using Apache POI HPSF. I copied this code after importing the JAR files. The How-To page discusses exceptions which might be thrown but none of them include "ArrayIndexOutOfBoundsException caused by the line: final String file = args[0]; Here's the fulle code:

import java.io.*;
import org.apache.poi.hpsf.*;
import org.apache.poi.poifs.eventfilesystem.*;

// ...

public static void main(String[] args) throws IOException {

    final String filename = args[0];
    POIFSReader r = new POIFSReader();
    r.registerListener(new MyPOIFSReaderListener(),
                       "\005SummaryInformation");

    r.read(new FileInputStream(filename));

}

I appreciate your help.

edited Apr 15 '20 at 08:40

Stultuske

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asked Apr 15 '20 at 08:36

Mobbs 8

Apparently `args` is empty. So there is no element at index `0`. Check `args.length`, its `0`. – Zabuzard Apr 15 '20 at 08:38
1

You don't seem to invoke your program with any parameters – Lino Apr 15 '20 at 08:45

Why does initializing a final String to args[0] throw an ArrayIndexOutOBoundsException?

0 Answers0