while reading the book "clean code" I came across the following instruction:
"Local variables should be declared just above their first usage and should have a small vertical scope. We don’t want local variables declared hundreds of lines distant from their usages."
see the following example:
public class A {
public static void main(String[] args) {
String name = "Robert";
String country = "iiiii";
int age = 21;
String hobby = "Soccer";
System.out.println("my name is "+name+"I'm "+age+" and I'm from "+country);
/*
*
* a lot of code here
*
* */
System.out.println("my hobby is: " + hobby);
}
}
Here the variable hobby is a throw stone from its usage , so I want to make sure if it is clean to write like the code bellow?, because I often see local variables declared in the top level of the function :
/*the previous code here*/
String hobby = "Soccer";
System.out.println("my hobby is: " + hobby);
It is actually recommended to declare a variable in least possible scope. So declare it where u use it. It just makes your code little cluttered.