logfile = "/home/weblogic/javaapp.txt"
java_count = 0
if File.exist? '/home/weblogic/javaapp.txt'
  log = Facter::Util::FileRead.read(logfile)
  unless log.nil?
    log.each_line do |line|
      case
      when line.include?('/java')
        java_count += 1
        java_path = line.split(/ /)[0]
      when line.include?('java version')
        java_version = line.split('"')[1]
        Facter.add("java_u01_weblogic_foundversion#{java_count}u01_#{java_count}_path") do
          setcode do
            java_version + java_path
          end
        end
      end
    end
  end
  Facter.add("java_u01_weblogic_foundversion_count") do
    setcode do
      java_count
    end
  end
end

/u01/java/jdk1.7.0_72/jre/bin/java
java version "1.7.0_72"
Java(TM) SE Runtime Environment (build 1.7.0_72-b14)
Java HotSpot(TM) 64-Bit Server VM (build 24.72-b04, mixed mode)
/u01/java/jdk1.7.0_72/bin/java
java version "1.7.0_72"
Java(TM) SE Runtime Environment (build 1.7.0_72-b14)
Java HotSpot(TM) 64-Bit Server VM (build 24.72-b04, mixed mode)

str = IO.read('file.txt')
match = str.match(/java version "([^"]+)"/)
puts match[1]

lines = [
  '/u01/java/jdk1.7.0_72/jre/bin/java',
  'java version "1.7.0_72"',
  'Java(TM) SE Runtime Environment (build 1.7.0_72-b14)',
  'Java HotSpot(TM) 64-Bit Server VM (build 24.72-b04, mixed mode)',
  '/u01/java/jdk1.7.0_72/bin/java',
  'java version "1.7.0_72"',
  'Java(TM) SE Runtime Environment (build 1.7.0_72-b14)',
  'Java HotSpot(TM) 64-Bit Server VM (build 24.72-b04, mixed mode)',
]

lines.grep(%r!/java!)
# => ["/u01/java/jdk1.7.0_72/jre/bin/java", "/u01/java/jdk1.7.0_72/bin/java"]