保持这个例外所以我想写一个循环与读取下一行的BufferedReader,将该行转换为双精度,然后将其添加到总和。这是继续到文件的结尾。保持与readLine()
出于某种原因,我不断收到此错误,
Exception in thread "main" java.lang.NullPointerException
at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:1017)
at java.lang.Double.parseDouble(Double.java:540)
这里是我有下面的代码:
while(bReader.readLine() != null)
{
line = bReader.readLine();
double num = Double.parseDouble(line);
sum = sum + num;
count++;
}
readLine第二次调用将再次要求输入 – 2015-02-09 06:56:22