java.lang.IndexOutOfBoundsException 9

Question

我希望代码在行结束时重新使用代理，当行结束时给我这个错误

@Override
            public void run()
            {
                try
                {
                    String proxy = null;
                    while (true)
                    {
                        proxyCount++;
                        if(proxyCount >= proxyList.size() - 1)
                        {
                            proxyCount = 0;
                        }
                        proxy = proxyList.get(proxyCount);
                        if (!deadProxy.contains(proxy))
                        {
                            break;
                        }
                    }
                    String[] split = proxy.split(":");
                    String proxyHost = split[0];
                    int proxyPort = Integer.parseInt(split[1]);

这是错误

java.lang.IndexOutOfBoundsException: Index: 9, Size: 9
    at java.util.ArrayList.rangeCheck(Unknown Source)
    at java.util.ArrayList.get(Unknown Source)
    at PingDeath$2.run(PingDeath.java:142)
    at java.lang.Thread.run(Unknown Source)