How we convert string into int?

Question

I found some relevant question/answers but could not understand.kindly someone explain it to me.

Answer 1

int i=Integer.parseInt("12");
i=12;

Answer 2

In Java, you can use Integer.parseInt() to convert a String to int.
String number = "10";
int result = Integer.parseInt(number);
System.out.println(result);

Alternatively, you can use Integer.valueOf(), it will returns an Integer object.
String number = "10";
Integer result = Integer.valueOf(number);
System.out.println(result);

If the string does not contain a parsable integer, a NumberFormatException will be thrown.

Answer 3

Using ParseInt method.. which is a static method.