JAVA - 檔案處理

發現BufferedReader還好用的
大家還是多學學比較好
這個裡面有包含讀和寫了

import java.io.*;

public class FileIO {
   public static void main(String[] args) throws IOException {
 BufferedReader keyin = new BufferedReader(new InputStreamReader(System.in));

 String fileName = keyin.readLine();

 FileReader fileInput = new FileReader(fileName);
 BufferedReader fr = new BufferedReader(fileInput);
 
 String Temp;
 String Data = "";

 while((Temp = fr.readLine()) != null)
     Data += Temp + "\n";

 System.out.println(Data);

 fileName = keyin.readLine();
 FileWriter fw = new FileWriter(fileName);

 fw.write(Data);
 fw.flush();     //This is important,without it,the file won't be written.
   }
}