Computers and Technology, 17.10.2019 17:30, deedivinya

Given the class 'readonly' with the following behavior:
a (protected) integer instance variable named 'val'.
a constructor that accepts an integer and assigns the value of the parameter to the instance variable 'val'.
a method name 'getval' that returns the value of 'val'.

write a subclass named 'readwrite' with the following additional behavior:
any necessary constructors.
a method named 'setval' that accepts an integer parameter and assigns it the the 'val' instance variable.
a method 'isdirty' that returns true if the setval method was used to override the value of the 'val' variable.

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Given the class 'readonly' with the following behavior:
a (protected) integer instance variab...