我试图做一个简单的类,它读出一个在线.txt的内容并将它存储在一个DataClass中。BufferedReader空指针txt上的异常
不知何故,我在while循环中的第一个变量赋值中得到一个Nullpointer异常,尽管行被打印为“4”。
任何人都知道我的代码中的问题?中的.txt的
public class GetFile {
public static List<Log> getFile(){
URL url = null;
List<Log> list = new ArrayList<Log>();
try {
url = new URL("http://test.net/test.txt");
BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
String line;
while ((line = in.readLine()) != null) {
Log log = new Log();
System.out.println("Line is: " + line);
**-->log.day = Integer.getInteger(line);<--**
line = in.readLine();
log.month = Integer.getInteger(line);
line = in.readLine();
log.year = Integer.getInteger(line);
line = in.readLine();
log.hour = Integer.getInteger(line);
line = in.readLine();
log.minute = Integer.getInteger(line);
line = in.readLine();
log.hum = Float.parseFloat(line);
line = in.readLine();
log.temp = Float.parseFloat(line);
list.add(log);
System.out.println("Item added");
}
in.close();
} catch (MalformedURLException e) {
e.printStackTrace();
}
catch (IOException e1) {
e1.printStackTrace();
}
return list;
}
}
内容是以下几点:
4
2
2016
22
14
49.5999984741
19.2999992371
4
2
2016
22
14
49.5999984741
19.2999992371
4
2
2016
...
工作就像一个魅力! 谢谢! –