Converting a String with spaces to an Integer in java

Question

I'm trying to convert a String variable into an integer, only the String looks like this (for example):

String string = " 12";

And so the String has a space in front of it. Now the String variable is being read from a .txt file which is why I'm having the issue of having the space in front of it. I need to convert the variable into an int, but when I try:

int integer = Integer.parseInt(string);

to pass the String into an integer, it compiles but I get an error when trying to run the program, since there is white space as part of the String.

Is there a way to pass a String of numbers with a space in front of it into an int? Would .trim work? And if so, how would I use that? (I'm not very familiar with .trim, I'm still learning!!) I appreciate the help! ^_^

Answer 1

Would .trim work? And if so, how would I use that?

Yes, trim() will work, it will remove leading and trailing spaces from String,

int integer = Integer.parseInt(string.trim());

Answer 2

Use the string trim function in Java to first get a string without the spaces, then parse it...

1.) Remove spaces with trim ... String#trim

String stringWithoutSpace = string.trim();

2.) Parse the string without spaces ... Integer#parseInt

int integer = Integer.parseInt(stringWithoutSpace);

3.) Do everything above in one step ...

int integer = Integer.parseInt(string.trim());