My sound stopped working after installing Java

my sound stopped working after installing Java

Make sure Must is not selected in System Preferences > Sound
Might be corrupted sound preferences ...
Open the Finder.
From the Finder menu bar click Go > Go to Folder
Type or copy/paste:   /Library/Preferences
Click Go then move the com.apple.soundpref.plist file from the Preferences folder to the Trash.

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