This is a strange post. None of the reasons you give for using Java relate to the question (MQSeries) specifically; they're just general complaints about Perl, and they border on FUD. Many of us have written large systems in Perl, and found them as maintainable as any Java code.

There's nothing wrong with criticizing Perl and people do it here all the time. However, try to make your critiques on-topic for the question you are answering.