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 MyFile {
  public static void main(String[] args) {
     File dir = new File("d:\\yangzhenhao");
     File deletedFile = new File(dir,"hao.java");
     FileAccept acceptCondition = new FileAccept("java");
     File fileName[] = dir.listFiles(acceptCondition);
     for(int i=0;i<fileName.length;i++) {
       System.out.println("文件名稱:"+fileName[i].getName());
     }
     boolean boo = deletedFile.delete();
     if(boo)
       System.out.println("文件:"+ deletedFile.getName() +"被刪除");
  }
}