The Dumbest DrJava Bug Report Yet

Looking at DrJava bug reports often makes me upset: Either because there is a bug in DrJava, or because there might be a bug in DrJava, but I can’t know for sure because the user neglected to provide crucial information about the system DrJava was running on and the source code that was edited.

Then there is a completely different category: Bug reports filed by users who are so unbelievably ignorant that they report a bug in a "Hello World"-level program of theirs as a bug in DrJava. That really makes me lose my cool.

In order to vent a little, I herewith present you the dumbest DrJava bug report yet: [ 1914390 ] Unhandled exception: java.lang.NullPointerException.

Check out this masterpiece of software engineering:

import java.util.Scanner;

public class ScanFajlli {
public static void main(String arg[]) throws IOException {
Scanner s = null;
// String f = null;

try {
s = new Scanner(new BufferedReader(new

while (s.hasNext()) {
} finally {
if (s != null) {

It’s difficult to put the null value and the method call any closer together. Truly stunning.


About Mathias

Software development engineer. Principal developer of DrJava. Recent Ph.D. graduate from the Department of Computer Science at Rice University.
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