AVAJAVA Web Tutorials

In JavaSW, a File object can be a file or a directory. The object's isDirectory() method can be used to determine if the object is a directory. If it is a directory, an array of the File objects within it can be obtained by a call to listFiles(). This will be demonstrated with this project:

The DirectoryContents class gets a File object to the current directory. It gets an array of all the File objects within the current directory by calling f.listFiles(). It displays whether each File object is a file or a directory and displays its canonical path.

DirectoryContents.java

package test;

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

public class DirectoryContents {

	public static void main(String[] args) throws IOException {

		File f = new File("."); // current directory

		File[] files = f.listFiles();
		for (File file : files) {
			if (file.isDirectory()) {
				System.out.print("directory:");
			} else {
				System.out.print("     file:");
			}
			System.out.println(file.getCanonicalPath());
		}

	}

}

The output of the execution of DirectoryContents is shown here:

     file:C:\projects\workspace\testing\.classpath
     file:C:\projects\workspace\testing\.project
directory:C:\projects\workspace\testing\bin
directory:C:\projects\workspace\testing\f1
     file:C:\projects\workspace\testing\file1.txt
     file:C:\projects\workspace\testing\file2.txt
directory:C:\projects\workspace\testing\folder
directory:C:\projects\workspace\testing\lib
directory:C:\projects\workspace\testing\src

Comparing the project structure with the execution output shows that the output matches the expected results.