我安装了brew并安装了java，然后尝试使用以下命令安装Scala。我收到了错误
brew cask install scala
Error: Cask 'scala' is unavailable: No Cask with this name exists. Did you mean one of:
scala-ide
Error: Install incomplete.
然后我尝试使用这个命令brew install Caskroom / cask / scala-ide。然后我安装了火花和SBT。现在的问题是我无法打开Scala。我可以打开火花，但不是斯卡拉。但Brew确认已安装Scala。
我尝试这个命令
brew install Caskroom/cask/scala-ide
Updating Homebrew...
==> Auto-updated Homebrew!
Updated 1 tap (homebrew/core).
==> Updated Formulae
getdns
==> brew cask install Caskroom/cask/scala-ide
Warning: Cask 'scala-ide' is already installed.
To re-install scala-ide, run:
brew cask reinstall scala-ide
如果已经安装了Scala，我该如何打开它。