如下代码：
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| package com.test.websocket;
import javax.websocket.server.ServerEndpointConfig.Configurator;
public class ChatServerEndPointConfigurator extends Configurator {
private ChatServerEndPoint chatServer = new ChatServerEndPoint();
@Override
public <T> T getEndpointInstance(Class<T> endpointClass)
throws InstantiationException {
return (T) chatServer;
}
}
|
第12行会有警告 Class Type safety: Unchecked cast from ChatServerEndPoint to T
修改为：
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| if(endpointClass.isAssignableFrom(chatServer.getClass())){
return endpointClass.cast(chatServer);
}else{
AssertionError ae = new AssertionError("Cannot cast to " + endpointClass.getName() +
" from " + chatServer.getClass().getName());
log.error("类型不匹配", ae);
throw ae;
}
|
可消除警告。