问题描述
嗨我有一个看起来像这个10 -1 30 -2的字符串,我想读取空格之间的数字。我可以使用FOR语句和代码
Hi i have a string looking something like this 10 -1 30 -2 and i want to read the numbers between spaces. I can do this using a FOR statement and the code
Character.toString(myString.charAt(i));
和
Integer.parseInt(myString);
但是当我尝试读取-1的负数时我遇到了问题,我收到了错误消息:
But i face a problem when i try to read negative number like -1 and i got the error message:
09-09 13:06:49.630: ERROR/AndroidRuntime(3365): Caused by: java.lang.NumberFormatException: unable to parse '-' as integer
任何想法如何解决这个问题??
Any ideas how to solve this ??
推荐答案
您正在尝试解析单个字符(' - '
)(在将其转换为字符串后,无可否认)而不是字符串-1。如果您使用 charAt
,您将一次解析一个数字,因此10将显示为1然后为0,而不是10。
You're trying to parse a single character ('-'
) (after converting it to a string, admittedly) instead of the string "-1". If you use charAt
you'll be parsing a single digit at a time, so "10" will come out as 1 and then 0, not 10.
如果你只是在空格上拆分你的字符串,你应该能够毫无问题地解析字符串。
If you just split your string on spaces, you should be able to parse the strings with no problems.
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