Java - Path by File Object

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Introduction

To get the absolute and canonical paths of a file, use the following two methods: 

f.getAbsolutePath();
f.getCanonicalPath();

If the pathname used to construct the File object is not absolute, the getAbsolutePath() method uses the working directory to get the absolute path.

getCanonicalPath() throws IOException.

Demo

import java.io.File;
import java.io.IOException;

public class Main {
  public static void main(String[] args) {
    String workingDir = System.getProperty("user.dir");
    System.out.println("Working Directory: " + workingDir);
    printFilePath("dummy.txt");
    printFilePath(".." + File.separator + "notes.txt");
  }/*from   ww  w  . j a v  a  2 s  . c  o  m*/

  public static void printFilePath(String pathname) {
    File f = new File(pathname);
    System.out.println("File Name: " + f.getName());
    System.out.println("File exists: " + f.exists());
    System.out.println("Absolute Path: " + f.getAbsolutePath());

    try {
      System.out.println("Canonical Path: " + f.getCanonicalPath());
    } catch (IOException e) {
      e.printStackTrace();
    }
  }
}

Result

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