如何将变量“totalTransactions”添加到自身加上变量“this.transactions”，以便每个线程的总数结转？

问：

如果我有一个变量，我想添加它的值加上每个线程的事务数。我将如何在此方法中做到这一点？private int totalTransactions = 0;

@Override
public void run()
{
    Random r = new Random();
    for(int i=0;i<this.transactions; i++)
    {
        int source=r.nextInt(this.accounts);
        int amount = r.nextInt(500) + 1;
        int dest;
        do {dest = r.nextInt(this.accounts);} while (source == dest);
        try
        {
            this.bank.transaction(source,dest,amount);
        } catch(Exception e){}
    }
    this.bank.end(this.index); //note that this thread is finished
    totalTransactions = totalTransactions + this.transactions;
}