[J2MEQ&A]WTK初始化WMAClient报错XXX has no IP address的解释

 

[J2ME]WTK初始化WMAClient报错XXX has no IP address的解释

 

[现象]

当通过WTK运行一个J2ME程序时，KToolbar显示这样的错误：

错误形态一

WMAClient: localhost has no IP address: java.net.UnknownHostException: xxxx: xxxx
Warning: Failed to initialize WMA message routing support
ClientConnector: localhost has no IP address: java.net.UnknownHostException: xxxx: xxxx
Warning: Failed to initialize Bluetooth (JSR 82) support

(xxxx指的是机器名字)

或者看到

错误形态二

Running with storage root DefaultColorPhone
WMAClient: localhost has no IP address: java.net.UnknownHostException: 梅花
Warning: Failed to initialize WMA message routing support
ClientConnector: localhost has no IP address: java.net.UnknownHostException: 梅花

 

[原因]

如果你第一次运行WTK之后，就改变了本机的IP地址，那么可能会导致WTK误认为你没有IP地址。或者你需要检查是否有网卡。  

或者检查你的机器名，不能为中文。

[解决]

把你的IP地址改回第一次运行WTK时的那个。

或装一个网卡。  

或将机器名改为英文名称。

[详细解释]

可能WTK初始化WMAClient和ClientConnector时，必须先运行InetAddress.getLocalHost()来寻找localhost的IP地址。

但是你看

http://www.vf.utwente.nl/~vriesajk/j2me/java/net/InetAddress.html#getLocalHost()

它说了

“Throws:

UnknownHostException - if no IP address for the host could be found.

”

所以，如果它没有能够找到IP地址的话，它就报告“localhost has no IP address”。