字符串比较导致不正确的结果

Question

I have a path URL written in a file. I use the Scanner class to record that URL and output it to string variable "s". I then use the.equals() method to compare it and the path URL in my "gameDataFile" File object. The result is false, despite them being the same string as recorded in my console. What is happening here?

Path URL in file:

src\gameData\character_data.csv

Code snippet:

String s = in.next();                       // in is a java.util.Scanner object
System.out.println(gameDataFile.getPath()); // gameDataFile is a java.io.File object
System.out.println(s);
System.out.println(s.equals(gameDataFile.getPath()));

Console output:

src\gameData\character_data.csv
src\gameData\character_data.csv
false

EDIT: as per request of @MTilsted, the following code snippet

String s = in.next();
System.out.println("'" + gameDataFile.getPath() + "'");
System.out.println("'" + s + "'");
System.out.println(s.equals(gameDataFile.getPath()));

Results in the console output:

'src\gameData\character_data.csv'
'
false

It seems to have replaced the URL with one single quotation mark

Answer 1

Try this instead:

String s = in.next();                       // in is a java.util.Scanner object
System.out.println("'" + gameDataFile.getPath() + "'"); // gameDataFile is a java.io.File object
System.out.println("'" + s + "'");
System.out.println(s.equals(gameDataFile.getPath()));

Answer 2

Thanks to @VGR, the problem was that the String "s" contains an addition "Carriage return" character (ascii code 13).

Answer 3

The utf8 file in windows has a BOM (byte order mark) at the start of the file by default. It is invisible, but it really exist. I think it cause two string different even if they look the same.

Answer 4

add a backslash before the single quote