import java.io.*;
class FileAccept implements FilenameFilter 
{  
   String str=null;
   FileAccept(String s)
   {  
      str="."+s;
   }
   public  boolean accept(File dir,String name)
   {
      return name.endsWith(str);
   }              
}
public class Example
{  
   public static void main(String args[ ])
   { 
      File dir=new File("C:/1000");
      FileAccept acceptCondition=new FileAccept("java");
      File  fileName[]=dir.listFiles(acceptCondition);
      for(int i=0;i< fileName.length;i++)
           { 
             System.out.printf("\n文件名稱:%s,長度:%d",
                               fileName[i].getName(),fileName[i].length());
             
           }
       boolean boo=fileName[0].delete();
       if(boo)
       {
            System.out.printf("\n文件:%s被刪除:",fileName[0].getName());
       } 
   }
}