makedirectories.java

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//: MakeDirectories.java
// Demonstrates the use of the File class to
// create directories and manipulate files.

import java.io.*;

public class MakeDirectories {
	private final static String usage = 
		"Usage:MakeDirectories path1...\n"+
		"Creates each path\n" +
		"Usage:MakeDirectories -d path1...\n" +
		"Delete each path\n" +
		"Usage:MakeDirectories -r path1 path2\n" +
		"Rename from path1 to path2\n";
	
	private static void usage() {
		System.err.println(usage);
		System.exit(1);
	}
	
	private static void fileData(File f) {
		System.out.println( 
		"Absolute path: " + f.getAbsolutePath() +
		"\n Can read: " + f.canRead() + 
		"\n Can Write: " + f.canWrite() +
		"\n getName: " + f.getName() +
		"\n getParent: " + f.getParent() +
		"\n length: " + f.length() +
		"\n lastModified: " + f.lastModified() );
		if( f.isFile())
			System.out.println("it's a file");
		else if(f.isDirectory() )
			System.out.println("it's a directory");
	}
	
	public static void main(String[] args) {
		if(args.length<1) usage();
		if(args[0].equals("-r")) {
			if(args.length != 3) usage();
			File 
				old = new File( args[1] ), 
				rname = new File( args[2] );
			old.renameTo(rname);
			fileData(old);
			fileData(rname);
			return;
		}
		
		int count = 0;
		boolean del = false;
		if(args[0].equals("-d")) {
			count++;
			del = true;
		}
		
		for( ; count <args.length; count++) {
			File f = new File(args[count]);
			if( f.exists() ) {
				System.out.println(f+" exists" );
				if(del) {
					System.out.println("deleteing ..." + f);
					f.delete();
				}
			}
			else { // Doesn't exist
				if(!del) {
					f.mkdirs();
					System.out.println("create " +f);
				}
			}
			fileData(f);
		}
	}
}