How multiple user threads manipulate the same static variable??

[pilusoni1992@gmail.com]

Consider the banking example. We know that there is a ledgerBalance(static) and it will be manipulated by every account holder when he/she does the transaction.

class Account{

private double myBalance;

public static double ledgerBalance;

public void withdraw(double amount){
if(myBalance > 0){
ledgerBalance = ledgerBalance-amount;
myBalance = myBalance - amount;
}

}

public void deposit(){
ledgerBalance = ledgerBalance+amount;
myBalance = myBalance +amount;
}

}

My question is how the ledgerBalance(which will be shared among all the A/C holders) will be changed at the same time if two or more user threads are doing the transaction at exactly same time.

What I am thinking that it is not possible to manipulate same variable by multiple threads at exactly same time.

[Norm]

Yes it is possible for a statement to be executed on different threads at the same time.

[Norm]

Also posted here: https://coderanch.com/t/724381/certi...ipulate-static