数组索引超出范围异常

-1

我是Java新手，并且给出了这段代码，没有解释就明白了。我得到的基础知识，但我不知道为什么错误到位。我得到数组索引超出范围异常

java.lang.arrayindexoutofboundsexception:2 
     at prealert.listener.<init>.(Listener.Java:26) 
     at prealert.listener.main(Listener.Java:40)

在此先感谢您的任何帮助。

package prealert; 

    import org.apache.log4j.Logger; 
    import org.apache.log4j.PropertyConfigurator; 

    import jpcap.JpcapCaptor; 
    import jpcap.NetworkInterface; 

    public class Listener { 

     private NetworkInterface[] devices; 
     private NetworkInterface deviceName; 
     private Reciever reciever; 
     private JpcapCaptor jpcap; 
     public static Logger log; 


     public Listener() { 
      PropertyConfigurator.configure("log4j.properties"); 
      log = Logger.getRootLogger(); 
      log.debug("Log4j has been initialized"); 
      devices = JpcapCaptor.getDeviceList(); 
      for (int i = 0; i < devices.length; i++) { 
       log.info(devices[i].description); 
      } 
      deviceName = devices[2]; 
      reciever = new Reciever(); 
      try { 
       jpcap = JpcapCaptor.openDevice(deviceName, 2000, true, 100); 
      } catch (Exception e) { 
       log.error("Error with JPcapCreation", e); 
      } 
      reciever.jpcap = jpcap; 
      reciever.start(); 
      new SetBoard(SetBoard.DEFAULT).start(); 
     } 

     public static void main(String args[]) { 
      try { 
       new Listener(); 
      } catch (Exception e) { 
       log.error("ERROR IN THE MAIN METHOD OF LISTENER!", e); 
      } 
     } 
    }

来源

2011-09-06 PGFDBUG

可能的重复[什么导致java.lang.ArrayIndexOutOfBoundsException，我该如何防止它？]（http://stackoverflow.com/questions/5554734/what-causes-a-java-lang-arrayindexoutofboundsexception-and-how-do -i-prevent-it） – Raedwald