How to install Java or uninstall Yosemite?

Upgraded my macbook in Yosemite. Some applications do not work, say they need Java SE 6, a "legacy" Java version. Not vital apps, but I would like to make.

MacBook is now painfully slow and buggy. I have to keep applications force - quit smoking. iPhoto has disappeared. I don't know the upgrade was a good idea.

I downloaded Java SE 6 with Oracle. Would not install because I have a newer version of Java.

I looked at several sites who advised on how to uninstall Java, most involving the opening of the Terminal and paste it into the code. It did not work.

I looked at how to uninstall Yosemite. The process seems very involved and delicate. A simple passerby, said one, is to use Time Machine to go back and restore the computer to a front date of upgrade. I tried this but the button 'restore' on Time Machine for archive pre-upgrade was grey and would not work.

Suggestions? Perhaps the time to bring it to the geniuses of Apple?

Kind of annoyed that Apple has pushed so hard to upgrade - using deliberately annoying guests who could not be removed from the screen by clicking on one of the "remind me in an hour', 'remember that night', or 'call back me tomorrow" buttons.

Sorry, I did not clear. My preference is to resolve the problem of Java. If this cannot be done, I would uninstall Yosemite.

Tags: Mac OS & System Software

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