Using int vs Integer

Question

I came across a class using Integer variables to capture size to be used in a for loop. Is this good practice or should we use the int primitive data type?

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Answer 1

When there is a need of using objects, you have to use the Wrapper classes, like Integer, Double, Float, etc...

eg:

 int n = Integer.parseInt("10");

Here we are converting the string to an integer (Primitive type) , but method parseInt(String str) works only on Wrapper classes (ie Object), so we used it... you will find many more use of it in java.