Java variable scope 🌍

Java variable scope

#Java #variable #scope

//**********************************************
public class Main {

public static void main(String[] args) {

//local = declared inside a method
// visible only to that method

//global = declared outside a method, but within a class
// visible to all parts of a class

DiceRoller diceRoller = new DiceRoller();

}
}
//**********************************************

public class DiceRoller {

Random random;
int number;

DiceRoller(){
random = new Random();
roll();
}

void roll() {
}
}
//**********************************************

[BroCodez]

public class Main {

public static void main(String[] args) {

//local = declared inside a method
// visible only to that method

//global = declared outside a method, but within a class
// visible to all parts of a class

DiceRoller diceRoller = new DiceRoller();

}
}

import java.util.Random;

public class DiceRoller {

Random random;
int number;

DiceRoller(){
random = new Random();
roll();
}

void roll() {
number = random.nextInt(6)+1;
System.out.println(number);
}
}

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[EaglesOps]

IF anyone is confused why he did not assign number in the DiceRoller constructor to 0 its because in java when you intitialize an int it is automatically assigned 0.

[formlessavatar]

Thanks so much bro. Just wondering if there's actually any difference between the 2 approaches shown (declaring locally and passing as arguments to a method vs. creating global variables that can be accessed anywhere), in terms of memory use and/or any other practical considerations? Are there certain common situations/use-cases I could run into that may warrant using one way over the other, or do we just decide based on individual applications each time? Cheers, much love <3

[mayankgupta]

Java like other language such as C and C++ doesn't have the concept of Local and Global variables as Java is a strictly Object Oriented Language.
There are 2 scope defined by Java, one defined by the class and another defined inside the method.
P.S - I am not pointing out, I have learnt a great deal from you and love all your videos.

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