SocketConnection 参数详细介绍

请大家看下面的代码： 
len = is.read(gData); 
这句代码会阻塞在这里，用了上面红色标出的代码后，能不能实现，超过5秒没反应后，read就不阻塞，而向下执行代码！  
try 
{ 
int len = 0; 
    sc = (SocketConnection) Connector.open("socket://100.42.25.3:885"); 
    is = sc.openInputStream(); 
    os = sc.openOutputStream(); 
    sc.setSocketOption( SocketConnection.LINGER, 5); 
    pmm.gDataBuf = null; 
    sender = new Sender(os); 
    sender.send(pmm.gStringReq); 
    // Loop forever, receiving data 
    gData = new byte[pmm.BUF_LENGTH]; 
    currentIndex = 0; 
    gBuf = new byte[50*1024]; 
    while (!pmm.bStopConnect) 
    { 
len = is.read(gData); 
    System.arraycopy(gData,0,gBuf,currentIndex,len); 
    currentIndex += len;