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I'm trying to upgrade to Java 7 on my 2010 macbook pro running OSX Lion. I downloaded jdk 7u15 and it goes through the entire install procedure flawlessly. However when I went to add it into Eclipse I found it was not under System/Library/Java/JavaVirtualMachines as was Java 6. I can't find it anywhere.
On Mountain Lion, mine is in /Library/Java/JavaVirtualMachines/jdk1.7.0_15.jdk/
Use /usr/libexec/java_home -V on a Mac to see all JDK versions installed. (JDK 7 versions reside normally under /Library/Java/JavaVirtualMachines).
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I updated my java VM to v8. But still my command promt shows version is 1.8 and i am unable to run java commands in PC. What is the exact issue ? give me some suggestions to rectify this.....
Java 8 and 1.8 mean the same thing. If java -version reports 1.8.0, then you are using Java 8. So there is no issue: nothing to rectify.
The official word on version numbers and names for Java 8 is in this Oracle document:
Java Platform, Standard Edition 8 Names and Versions.
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Would there be any technical differences if I installed Java from an RPM versus just running the available binary? I am running on CentOs 6.3 and Java is 1.7
Depends what you mean by "technical differences" and "just running the available binary" but, no, there is no difference to running the bundled RPM version of the JRE/JKD from the exact same JRE/JDK, from the same manufacturer, for the same version, for the same platform and for the same architecture (32/64bit) from a downloaded TGZ.
An Operating System bundled JRE/JDK may have bundled extra libs, security configuration, certificates which may be different to a vanilla TGZ.
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I am using Java SE 7 to program simple games for windows and mac, but I have to switch to java 6 to run games such as Minecraft on my computer. This used to work just fine before I updated to Mac OS X 10.8.2 Build 12C60. Before this update I used to be able to open java preferences and check off java 6 or java 7. But now I don't seem to be able to find java preferences.
I am running mac OS X 10.8.2 (latest version)
Thanks.
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Anyone know how to remove Java 7 from Mountain Lion?
Installed it, didn't work properly so installed Java 6 and now everything works fine. Want to now get rid of Java 7.
Done it, I kept searching for mountain lion, searched for remove java 7 from mac and it was the same as doing it on mountain lion anyway:
http://www.java.com/en/download/help/mac_uninstall_java.xml
that solved it.
have you looked at your Java Preferences? /Applications/Utilities I dont think it will allow you to remove Java 7 but it will enable you to decide which version to use by default. Also if you are using an IDE such as Eclipse you are able to set a preference for a particular version on different projects. Can you give more details about it not working properly?
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I have already JDK 1.6.0.0_25 on my computer with Windows 7 Professional.
How I can savety update current JDK to JDK 7.0 and tesing this update?
I suggest you install JDK 7 as well. You can have Java 6 installed as well and make this this default. You can uninstall one or other version later.
IMO a good way would be to download and install JDK 7 separately. If it works out fine for you, uninstall the previous one and update the environment variables accordingly (namely JAVA_HOME and PATH). You can download the latest stable release here.
Install Java 7. Uninstall Java 6 if it doesn't do that already. If there's an issue with Java 7, uninstall it, reinstall Java 6.
If you're really worried, make a backup. Or try installing it on a VM image of your machine first.