过滤器

package com.t48.next.partice;

import java.io.*;

public class FilterDemo {

public static void main(String[] args) {

try {
//设置当前路径
File path = new File(".");
String[] list;

if(args.length==0)
list = path.list();
else
//若有输入参数则将输入参数作为过滤因子
list = path.list(new DirFilter(args[0]));
for (int i = 0; i < list.length; i++) {
System.out.println(list[i]);
}
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}


}
// 建立静态内部类

static  class DirFilter implements FilenameFilter{

String fileName;
DirFilter(String fileName){

this.fileName = fileName;
}

//继承accpt方法,如果不符合过滤要求过滤掉
public boolean accept(File dir, String name) {
// TODO Auto-generated method stub

String file = new File(name).getName();

return file.indexOf(fileName)!=-1;
}

}
}