Java parseInt integrity check

I'm trying to parse an int from a string array element. Here's my code:

String length = messageContents[k].replace("Content-Length:","").replace(" ","");
System.out.println("Length is: " + length);
int test= Integer.parseInt(length);

System. out. Println returns the following: length: 23

However, when I try to parse a string into int, I throw a Java lang.NumberFormatException;

java.lang.NumberFormatException: For input string: "23"

I'm a little confused about how 23 translates into int. I can only assume that some other characters are blocking it, but I can't see it in my life

Any suggestions?

thank you

to update

Despite the String length having only two characters,Java reports its length as three:
Length is: '23'
Length of length variable is: 3
length.getBytes = [B@126804e

Solution

Try this variant:

int test= Integer.parseInt(length.trim());