The weird symbol in the stack trace:
Stacktrace:
java.io.FileNotFoundException: E: estilename.png (The filename, directory name, or volume label syntax is incorrect)
.java-encoded ANSI intended String"E:\test\filename.png"
1)compile no problem open with notepad doesn't see the weird symbol
end peacefully with
[wrote Filereadapp.class] [total 691ms]
-JDK:13.0.1,use Javafx &Apache Common IO as module
uses module path ,verbose,add module -options
compiled with batch file running commands,cd... & javac...
-Had seen the that some post suggest it's local win file sys job. or maybe the JDK job?
But I don't know how it works that changes the String itself. and how to fix it, prevent it?
2)StringBuilder->append all directory >append("e:").append("\test").append("\filename.png");
SB->String
FileOutputStream(Stringitself)
These are not the code itself!^ Just showing the flow of the real code.
Note on possible duplicate
I don't believe this is a duplicated post with any ?? char in Japanese word or anything.
Like file read/write using the relative path, as stated I gave absolute path unless the implementation of the absolute path is wrong.
In Java (and many other languages) \ is used to escape special characters (such as newline \n). Here you are escaping the letters t and f (\t is a tab and \f is a form-feed character) assuming your String looks like
String s = "e:\test\filename.png";
to fix that you can use any of
String s = "e:\\test\\filename.png";
or
String s = "e:/test/filename.png";
or
String s = "e:" + File.separator + "test" + File.separator + "filename.png";
And I'm sure there are a few other ways to write it too.