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class MaxQueue
    attr_reader :queue, :max_queue
 
    def enqueue(element)
        queue.push(element) # Insert at tail
 
        # Iteratively remove from max_queue until its empty
        # or tail element is greater than element
        while max_queue.last < element || !max_queue.empty?
            max_queue.pop
        end
        max_queue.push(element)
    end
 
    def dequeue
        element = queue.shift
        if max_queue.first == element
            max_queue.shift
        end
 
        element
    end
 
    def max
        max_queue.first
    end
end
 

Main.java:1: error: '{' expected
class MaxQueue
              ^
Main.java:5: error: illegal character: '#'
        queue.push(element) # Insert at tail
                            ^
Main.java:7: error: illegal character: '#'
        # Iteratively remove from max_queue until its empty
        ^
Main.java:8: error: illegal character: '#'
        # or tail element is greater than element
        ^
Main.java:9: error: > expected
        while max_queue.last < element || !max_queue.empty?
                                      ^
Main.java:9: error: illegal start of type
        while max_queue.last < element || !max_queue.empty?
                                       ^
Main.java:9: error: <identifier> expected
        while max_queue.last < element || !max_queue.empty?
                                         ^
Main.java:9: error: '(' expected
        while max_queue.last < element || !max_queue.empty?
                                           ^
Main.java:9: error: illegal start of type
        while max_queue.last < element || !max_queue.empty?
                                                    ^
Main.java:9: error: ';' expected
        while max_queue.last < element || !max_queue.empty?
                                                          ^
Main.java:11: error: ';' expected
        end
           ^
Main.java:12: error: <identifier> expected
        max_queue.push(element)
                      ^
Main.java:12: error: <identifier> expected
        max_queue.push(element)
                              ^
Main.java:12: error: ';' expected
        max_queue.push(element)
                               ^
Main.java:27: error: reached end of file while parsing
end
   ^
15 errors

Standard output is empty