Question

求一个java的文件读取小程序的修改

借鉴这两个程序，或在此基础上修改，得一个程序ShowAllFiles.java要求得出的运行结果是以下这样，自己完全不知道是什么意思！老师没有给文件啊！参考ShowFile1.java

还有WriteFile1.java
1：import java.io*;
2:
3. public class WriteFile1 {
static void main(String[] args) {
5 : if (args length! = 1) {
6 System.out.println("使用方法：java WriteFile1 文件");
7 System.out.println("例：java WriteFile1 output.txt<input.txt");
8 : System .exit(O);
9 }
10 String filename= args[O];
11 try {
12: BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
13 PrintWriter writer = new PrintWriter(new PrintWriter(new BufferedReader(new FileWriter(filename)));
14 String line;
15 while((line = reader .readLine () ) != null) {
16 : writer .println(line);
17 }
18 reader close () ;
19 writer .cl ose () ;
20 } catch(IOException e){
21: System.out.print(e);
22 }
23 }
24 }

这是运行结果
% ls test Alice Bob% cat test/Alice This is Alice.% cat test/Bob This is Bob.% java ShowAllFiles testFile: test/AliceThis is Alice.File: test/BobThis is Bob.

求助！拜托了！谢谢~~！

Answer 1

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;

public class zz {
	public static void main(String[] args) throws Exception  {
		File[] file=new File(args[0]).listFiles();
		for (File s:file){
			BufferedReader reader=new BufferedReader(new FileReader(s));
			System.out.println("File: "+s.getPath());
			String line;
			while((line=reader.readLine())!=null){
				System.out.println(line);
			}
			System.out.println();
			reader.close();
		}
	}
}