Doubt in arguments for method

#1

  1. why we have passed Scanner inside the method as an argument ?

  2. how the root node i.e “60” got inside into an arraylist as arraylist is created afterwards the data is put
    for example:
    this.data=data;
    this.children=new arraylist();
    how data got into an arraylist;

#2

@dheerajmishra992,

We would pass a Scanner object as a parameter into a method when we want that method to be more reusable.

It happens at the end of recursion. this.data stores the value in the data variable.

#3

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