过滤文件 ( 可虑当前路径下目录里的文件)
package com.qfedu.lian1;
import java.io.File;
import java.io.FilenameFilter;
public class Demo02{
public static void main(String args){
File file = new File ("D:/123");
File [ ] files = file . listFiles( new FilenameFilter ( ) {
@Overyride
public boolean accpet (File dir ,String name){ //dir 当前的目录 name 指当前目录下的文件名字
return new file (dir,name).isFile ( )&&name.endWith(".txt");
}
} );
for (File f : Files ){
System.out.println(f);
}
}
}