Serve the Print Queue

PrintQueue holds waiting job names in a java.util.Queue so the printer serves them in submission order. submit(String) and size() are written.

Requirements:
1. Complete serveAll() so it removes every waiting job and returns their names in arrival order, separated by a comma and a space.
2. Return an empty string when nothing is waiting.
3. The queue must be empty when serveAll() returns.

Do NOT write a main method.

Expected Output:

3↵
report.pdf, photo.png, notes.txt↵
0↵

= newline. The output ends with a newline — print one after the last line.

Hints4 available

Topics:

Data Structures & AlgorithmsQueues

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