Java Program To List Files In Directory

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import java.util.*;
import java.io.*;

public class JavaListFilesInDirectory {

	public static void main(String args[]) {
		if (args.length == 0) {
			args = new String[] { ".." };
		}

		List<String> nextDir = new ArrayList<String>();
		nextDir.add(args[0]);
		try {
			while (nextDir.size() > 0) {
				File pathName = new File(nextDir.get(0));
				String[] fileNames = pathName.list();
				for (int i = 0; i < fileNames.length; i++) {
					File f = new File(pathName.getPath(), fileNames[i]);
					if (f.isDirectory()) {
						System.out.println(f.getCanonicalPath());
						nextDir.add(f.getPath());
					} else {
						System.out.println(f);
					}
				}
				nextDir.remove(0);
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}
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