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The problem has always been with Java, that when you install a new version, the older version it replaces does not get automatically uninstalled and you are left with more than one version on your system. Java is no different to other software and needs bugs fixing, code optimizing and security vulnerabilities repaired from time to time. As is the case with most software that is used on the internet like web browsers, security software and Windows itself, the Java Runtime Environment (JRE) is updated at regular intervals as well.
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