filetest2.java

这是一张java应用教程的随书光盘

import java.io.*;
public class FileTest2
{ public static void main(String[] args)
    {File dir=new File("/u"); 
     Filter filter=new Filter("ppt");
     System.out.print("list ppt files in directory  "+dir+"\n");
     String files[]=dir.list(filter);
     for(int i=0;i<files.length;i++){
        File f=new File(files[i]);
     	if(f.isFile())
     		System.out.print("file   "+f+"\n");
     	else
     	    System.out.print("sub directory   "+f+"\n");
        }
     }
}    
class Filter implements FilenameFilter
 {
	String extent;
	Filter(String extent){
		this.extent=extent;
	}
	public boolean accept(File dir,String name){
		return name.endsWith("."+extent);
	}
}