暇な卵はかわいがってコードを貼ります

//FileList.java

package keywords;
/*
 * fuction: returning the file list of the folder
 * 
 * by: Gonna
 * 
 *  */
import java.io.*;

public class FileList
{
	private static final String SEP = "/";
	private static StringBuffer sb = new StringBuffer("");
	
	// 
	public static String[] getFiles(File f) throws IOException
	{
		if(f.isDirectory())
		{
			File[] fs=f.listFiles();
			for(int i=0;i<fs.length;i++)
			{
				getFiles(fs[i]);
			}
		}
		else
		{
			sb.append(f.getPath() + SEP);
		}
		String s = sb.toString();
		String[] list = s.split(SEP);
		return list;
	}
	
	// -- 
	public static String[] getFiles(String t) throws IOException
	{
		File f = new File(t);
		
		if(f.isDirectory())
		{
			File[] fs=f.listFiles();
			for(int i=0;i<fs.length;i++)
			{
				getFiles(fs[i]);
			}
		}
		else
		{
			sb.append(f.getPath() + SEP);
		}
		String s = sb.toString();
		String[] list = s.split(SEP);
		return list;             
	}

	

//	public static void main(String args[]){
//		//FileList.output();
//		
//	}

}

package delete;
/*
 * function: deleting the file that you want
 * 
 * by:Gonna
 * 
 * */
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;

import keywords.FileList;

public class Delete {
	
	static String target = "result.txt";//the name of file
	
	static String dir ="datas//";//the folder that including files

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

		String[] dirlist = FileList.getFiles(dir);

		File f;

		ArrayList<String> al = new ArrayList<String>();

		for (int i = 0; i < dirlist.length; i++) {

			if (dirlist[i].contains(target))

			{

				f = new File(dirlist[i]);

				f.delete();

			}
			al.add(dirlist[i]);

		}

		for (int i = 0; i < al.size(); i++)

			System.out.println(al.get(i));
	}

}