java - 驱动程序.java :55: error: 'else' without 'if'

Question

所以基本上我只是想让这段代码正常工作。当我在两个“if”语句下面有“else”时，它就会运行。但是，当我将其移至上方时，会出现以下错误:

Driver.java:55: error: 'else' without 'if'

我非常感谢您帮助解决此问题，以便它再次运行。

     {
        synchronized(someObject)
        {
           someObject.wait();
           System.out.println(ID + " has been notified.");

           Customer customer = null;

           if(Dispatcher.customerRequiresPickUp() && (customer = Dispatcher.queue.poll()) != null && (rideCount >= workFinished))         

             System.out.println("Customer has been picked up by driver #" + ID);

             try
              {
                Thread.sleep(rn.nextInt(5000) + 1000);
                System.out.println("Driver #" + ID + " has dropped off " + customer.getName() + " at " + customer.getEndLocation() + ".");
              }
              catch(InterruptedException e)
              {
              }

           else
              System.out.println("Driver #" + ID + " will continue to wait for a customer."); 

           if(rideCount >= workFinished)
             onDuty(false);
        }   
     }

Answer 1

if(Dispatcher.customerRequiresPickUp() && (customer = Dispatcher.queue.poll()) != null && (rideCount >= workFinished))
{        

         System.out.println("Customer has been picked up by driver #" + ID);

         try
          {
            Thread.sleep(rn.nextInt(5000) + 1000);
            System.out.println("Driver #" + ID + " has dropped off " + customer.getName() + " at " + customer.getEndLocation() + ".");
          }
          catch(InterruptedException e)
          {
          }
}
else
{
  System.out.println("Driver #" + ID + " will continue to wait for a customer."); 
}

如果 if 语句的主体超过一行，则需要大括号 {}。就像这样^。