You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: java_requirement.rb
    path of file: ./repos/brew/Library/Homebrew/extend/os/linux/requirements
    
    the code of the file until where you have to start completion: require "language/java"

class JavaRequirement < Requirement
  env do
    env_java_common
    env_oracle_jdk
  end

  def possible_javas
    javas = []
    ja
    
  def possible_javas
    javas = []
    javas << Pathname.new(ENV["JAVA_HOME"])/"bin/java" if ENV["JAVA_HOME"]
    %w[jdk jdk@8 jdk@7].each do |formula_name|
      begin
        java = Formula[formula_name].bin/"java"
        javas << java if java.executable?
      rescue FormulaUnavailableError
        nil
      end
    end