[9] pry(main)> java.util.Enumeration.object_id => 2302 [10] pry(main)> java.util.Iterator.methods => [:impl, :new, :[], :append_features, :java_class, :extended, :class_variables, :<=, :public_instance_methods, :class_variable_get, :public_constant, :freeze, :instance_methods, :instance_method, :const_defined?, :to_s, :initialize_copy, :constants, :ancestors, :private_instance_methods, :===, :included_modules,
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:==, :class_eval, :const_get, :protected_instance_methods, :class_variable_defined?, :name, :private_constant, :<, :hash, :>, :>=, :module_exec, :pretty_print, :protected_method_defined?, :module_eval, :const_missing, :class_exec, :const_set, :private_method_defined?, :public_class_method, :autoload, :<=>,
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:public_method_defined?, :autoload?, :class_variable_set, :pretty_print_cycle, :include?, :remove_class_variable, :private_class_method, :method_defined?, :include_class, :handle_different_imports, :pry, :java_kind_of?, :__binding__, :pretty_print_instance_variables, :pretty_print_inspect, :public_send, :initialize_clone, :frozen?, :protected_methods, :java_implements, :public_method, :java,
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:singleton_methods, :untaint, :javafx, :enum_for, :private_methods, :method, :instance_variables, :extend, :instance_variable_set, :respond_to?, :java_name, :respond_to_missing?, :methods, :to_java, :java_package, :singleton_class, :public_methods, :to_enum, :display, :tainted?, :instance_variable_defined?, :untrusted?,
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:define_singleton_method, :nil?, :!~, :com, :instance_of?, :java_require, :javax, :java_signature, :tap, :java_annotation, :inspect, :send, :pretty_inspect, :trust, :instance_variable_get, :is_a?, :eql?, :untrust, :class, :=~, :org, :taint,
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:kind_of?, :clone, :initialize_dup, :dup, :!, :equal?, :instance_exec, :object_id, :__id__, :instance_eval, :__send__, :!=] [11] pry(main)> java.util.Iterator.object_id => 2306 [12] pry(main)> ArrayList list = new ArrayList() SyntaxError: unexpected tCONSTANT ArrayList list = new ArrayList() ^ [12] pry(main)> class ArrayIterattor [12] pry(main)* def initialize(array) [12] pry(main)* @array=array [12] pry(main)* @index=0 [12] pry(main)* end [12] pry(main)* def has_next? [12] pry(main)* @index<@array.length [12] pry(main)* end [12] pry(main)* def item [12] pry(main)* @array[@index] [12] pry(main)* end [12] pry(main)* def next_item [12] pry(main)* value=@array[@index] [12] pry(main)* @index+=1 [12] pry(main)* value [12] pry(main)* end [12] pry(main)* end => nil [13] pry(main)> array = [‘red’, ‘green’, ‘blue’] => [“red”, “green”, “blue”] [14] pry(main)> i = ArrayIterator.new(array) NameError: uninitialized constant ArrayIterator from org/jruby/RubyModule.java:2690:in `const_missing’ [15] pry(main)> i = ArrayIterattor.new(array) => #<ArrayIterattor:0x1763516 @array=[“red”, “green”, “blue”], @index=0> [16] pry(main)> while i.has_next? [16] pry(main)* puts(“item: #{i.next_item}”) [16] pry(main)* end item: red item: green item: blue => nil [17] pry(main)>