异常-java.lang.NumberFormatException：对于输入字符串：“ 000000000”

Question

I have this return after a query in database, I dont know what exactly means.

Caused by: java.lang.NumberFormatException: For input string: " 000000000"

Someone help me please. Thanks

Answer 1

This issue caused by number format exception. There is space in format input string: " 000000000" . Remove the space and try it again

Answer 2

Look at this part of your error message:
Caused by: java.lang.NumberFormatException: For input string: " 000000000"

Parsing the number is failing because there is a space at the beginning of your number String.

Remove that space and it should work.

Answer 3

From the Javadoc for NumberFormatException

Thrown to indicate that the application has attempted to convert a string to one of the numeric types, but that the string does not have the appropriate format.

In your case you have a space in the number, you can trim it with trim()

How i can do this in number?

Before attempting to parse the number you need to make sure it is formatted as a number.

eg

String s = " 00000000";
int n = Integer.parseInt(s.trim()); // remove leading/trailing spaces.