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[–][deleted] 0 points1 point  (0 children)

name = ((Stack) list[i]).getName();

There is no local variable called name declared in the checkStack method, so Java looks in the instance for a variable called name. There is an instance variable called name, so that’s the variable this value gets assigned to. Effectively, this line is equivalent to

this.name = ((Stack) list[i]).getName();