The variables of that class, it is of the same type. Divided into three types, if this is a private variable and then the variable is visible within the class. For example, getClassSched () method of the class Scheduler is unable to refer to a variable name of the class Instructor directly, but the value of name must be removed through a method called getName () of that class, but if the variable name is already registered as a public declare it Instructor will be able to refer to a name.
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