hello/java/samples/multithread/MultithreadingExample/src/multithreadingexample/BankOperation.java

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package multithreadingexample;

import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author denis
 */
public class BankOperation implements Runnable{

    @Override
    public void run() {
        BankAccount account = Bank.accounts.get(0);
        
        synchronized (account){
            String line = "Состояние до: " + account.getFund() + "руб., добавляем 10000 и получаем: " + account.fundUp(10000);
            System.out.println(line);
        }
        
        synchronized (account){
            String line = "Состояние до: " + account.getFund() + "руб., убавляем на 10000 и получаем: " + account.fundDown(10000);
            System.out.println(line);
        }
    }
    
}