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java readutf·½·¨ - Java / J2ME

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while (true) // Åжϵ±Êý¾ÝÁ÷²»Îª¿ÕµÄʱºò
{
s = dis.readUTF();
if (s == null)
break;

System.out.println(s);
msg.append(s);// ÓÃreadUTF()·½·¨¹¹Ôì×Ö·û´®
}
  } catch (EOFException e) {
e.printStackTrace();


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String s = null
try
{
while((s = dis.readUTF()) != null)
{
  msg.append(s);
}
}
catch(Exception e)
{
  e.printStackTrace();
}

String s = null
try
{
while((s = dis.readUTF()) != null)
{
  msg.append(s);
}
}
catch(Exception e)
{
  dis.close();
}

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