Homebrew-cask: Error: Cask 'java' is unreadable: undefined method `undent' for #<String:0x00007fd4751f2998> when running brew doctor

[seanreed1111]

General troubleshooting steps

• [ ] I understand that if I ignore these instructions, my issue may be closed without review.
• [ ] I have retried my command with --force.
• [ ] I ran brew update-reset && brew update and retried my command.
• [ ] I ran brew doctor, fixed as many issues as possible and retried my command.
• [ ] I have checked the instructions for reporting bugs.
• [ ] I made doubly sure this is not a checksum does not match error.

Description of issue

{{Error: Cask 'java' is unreadable: undefined method `undent' for # when running brew doctor}}

Command that failed

brew doctor

Output of command with --verbose --debug

Warning: Unexpected method 'license' called on Cask java.
Follow the instructions here:
  https://github.com/Homebrew/homebrew-cask#reporting-bugs
Error: Cask 'java' is unreadable: undefined method `undent' for #<String:0x00007ffe8fa1b720>
/usr/local/Caskroom/java/.metadata/1.8.0_102-b14/20160820230236.261/Casks/java.rb:70:in `block in load'
/usr/local/Homebrew/Library/Homebrew/cask/cask.rb:59:in `instance_eval'
/usr/local/Homebrew/Library/Homebrew/cask/cask.rb:59:in `config='
/usr/local/Homebrew/Library/Homebrew/cask/cask.rb:46:in `initialize'
/usr/local/Homebrew/Library/Homebrew/cask/cask_loader.rb:43:in `new'
/usr/local/Homebrew/Library/Homebrew/cask/cask_loader.rb:43:in `cask'
/usr/local/Homebrew/Library/Homebrew/cask/cask_loader.rb:87:in `cask'
/usr/local/Caskroom/java/.metadata/1.8.0_102-b14/20160820230236.261/Casks/java.rb:1:in `load'
/usr/local/Homebrew/Library/Homebrew/cask/cask_loader.rb:72:in `instance_eval'
/usr/local/Homebrew/Library/Homebrew/cask/cask_loader.rb:72:in `load'
/usr/local/Homebrew/Library/Homebrew/cask/caskroom.rb:42:in `block in casks'
/usr/local/Homebrew/Library/Homebrew/cask/caskroom.rb:36:in `map'
/usr/local/Homebrew/Library/Homebrew/cask/caskroom.rb:36:in `casks'
/usr/local/Homebrew/Library/Homebrew/cmd/doctor.rb:48:in `doctor'
/usr/local/Homebrew/Library/Homebrew/brew.rb:120:in `<main>'

Output of brew doctor --verbose

{{Warning: Unexpected method 'license' called on Cask java.}}

Output of brew tap

gschool/learn
homebrew/cask
homebrew/core
homebrew/services
thoughtbot/formulae
weaveworks/tap

[miccal]

You currently installed version of java is from an old version of the Cask file -- please run

brew uninstall --force java

then

rm -r "$(brew --prefix)/Caskroom/java"

then

brew install java

and this may fix your issue.

[ilciavo]

Remove previous version as mentioned by @miccal and [here] (https://github.com/Homebrew/homebrew-cask/issues/63117#issuecomment-491466734) rm -rf $(brew --prefix)/Caskroom/java

[seanreed1111]

Thank you this solved the problem.