Question

I was trying to make a code that will take input from a user and prints out the file path. I came across a interesting example. But I got stuck understanding a line.

//gets input from the user
BufferedReader input = new BufferedReader(newInputStreamReader(s.getInputStream()));
String request = input.readLine();
String path = new String(); 

int start = 0;
int end = 0;

for (int a = 0; a < request.length(); a++) {
    if (request.charAt(a) == ' ' && start != 0) {
        end = a;
        break;
    } 
    if (request.charAt(a) == ' ' && start == 0) {
        start = a;
    }
}

path = request.substring(start + 2, end); 

Why is a 2 is added at the end?

Answer 1

The java File class does most anything you need. What are you actually trying to do? What is the input? What kind of output are you looking for?

---

Per your comment, if you have a file in the working path called index.html, then you could:

File file = new File( "./index.html" );
System.out.println( file.getAbsolutePath() );

There is another method of the file class called getCanonicalPath() which may also be useful.