十四次作业

题目：编写一个应用程序，输入一个目录和一个文件类型，显示该目录下符合该类型的所有文件。之后，将这些文件中的某一个文件剪切到另外一个目录中。

package gre;
import java.io.*;
    public class FileAccept implements FilenameFilter {
        String i = null;
        FileAccept(String s){
            i = "."+s;
        }
        public boolean accept(File dir,String n){
            return n.endsWith(i);
        }

    }

package gre;
import java.io.*;
import java.util.*;
public class FileD {
    public static void main(String[] args) {
    
        System.out.println("输入目录：");
        Scanner r = new Scanner(System.in);
        String a1 = r.nextLine();
        File dir = new File(a1);
        System.out.println("输入文件类型：");
        String s2 = r.nextLine();
        FileAccept y = new FileAccept(s2);
        
        String fList[] = dir.list(y);
        
        
        for(int i=0;i<fList.length;i++){
            System.out.println(fList[i]);
        }
        
         System.out.println("输入要剪切的文件");
         String g = r.nextLine();    
         File dir2 = new File(g);
         String FilePath = "D:\ZJavaTest1"+"\"+g;
         BufferedReader in = null;
         BufferedWriter w =null;
         try {        

               in = new BufferedReader(new FileReader(g));
            w = new BufferedWriter(new FileWriter(FilePath));    
            String line = null;
            while((line=in.readLine())!=null) {
                    System.out.println(line);
                    w.write(line);
                }
           
            try {
                in.close();
                w.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
      }
}

运行结果