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POUnderstanding Oracle's Java on Mac
 

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    <p>I've been using Java on OS X for many, many years and recently when Apple stopped including Java by default I let the OS go and install it for me (Apple's variety, of course).</p> <p>So now I'm using OS X 10.8 and I need to install Java 7 so I just got Oracle's Update 15 in DMG form and ran the installer. It updated my /usr/bin/java (and related files) to point here:</p> <pre><code>/System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands/java </code></pre> <p>Tracing this back to '/System/Library/Frameworks/JavaVM.framework/Versions' everything either points to 'Current' or 'CurrentJDK', the former being a link to 'A' (which is Oracle's Java 7, from what I can tell, not sure why it is 'A') and the latter being a link to Apple's Java 6 in '/System/Library/Java/JavaVirtualMachines/1.6.0.jdk'.</p> <p>Now this is all really confusing but this isn't even my question yet. It appears there is a Java 7 installed here:</p> <pre><code>/System/Library/Frameworks/JavaVM.framework/Versions/A </code></pre> <p>But there is also a Java 7 installed here:</p> <pre><code>/Library/Java/JavaVirtualMachines/jdk1.7.0_15.jdk </code></pre> <p>Finding 'java' in both and printing out the version yields the same version and build (java version "1.7.0_15"), however, when hashing the files they are different.</p> <p>So does this mean Oracle installed Java 7 in two different places? If so, why? Which am I supposed to use? And why do some things still point to Java 6 (CurrentJDK). </p> <p>I've looked on Oracle's website but nothing there clears anything up. </p>
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