command package

find.java

package command;

import java.io.File;

public class find {
	public static void main(String[] args) {
		if (args.length == 0) System.out.println("please input path ...");
		else {
			find(args[0]);
		}
	}
	
	private static void find(String item) {
		File dir = new File("./");
		String[] list = dir.list();
		for (String list_ : list) {
			if (list_.equals(item)) {
				System.out.println(list_);
				showPath(list_);
			}
		}
	}
	
	private static void showPath(String path) {
		File dir = new File(path);
		if (dir.isFile()) {}
		else {
			String[] list = dir.list();
			for (String list_ : list) {
				File item = new File(path + "/" + list_);
				if (item.isDirectory()) list_ = list_ + File.separator;
				System.out.println(path + "/" + list_);
			}
		}
	}
}

ls.java

package command;

import java.io.File;

public class ls {
	public static void main(String[] args) {
		if (args.length == 0) dirlist(".");
		else {
			dirlist(args[0]);
		}
	}
	
	private static void dirlist(String path) {
		File dir = new File(path);
		String[] list = dir.list();
		
		try { System.out.println("List of " + dir.getCanonicalPath()); } catch (Exception e) { System.out.println("Error: "+e.getMessage()); }
		
		for (String list_ : list) {
			File isDir = new File(path + "/" + list_);
			if (isDir.isDirectory()) list_ = list_ + File.separator;
			System.out.println(list_);
		}
		
	}
}