284. static 변수·메서드와 private 필드

1class Account {
2    private int balance;
3    static int count = 0;
4 
5    Account(int money) {
6        balance = money;
7        count++;
8    }
9 
10    int getBalance() {
11        return balance;
12    }
13 
14    static int total(Account a, Account b) {
15        return a.getBalance() + b.getBalance();
16    }
17}
18 
19public class Main {
20    public static void main(String[] args) {
21        Account a = new Account(300);
22        Account b = new Account(200);
23        System.out.println(Account.count + " " + Account.total(a, b));
24    }
25}