working on overloaded write

src/main/java/rocks/zipcode/Document.java

@@ -2,16 +2,16 @@ package rocks.zipcode;
 
 import java.io.*;
 import java.nio.file.Files;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
-import java.util.Scanner;
 
 /**
  * @author leon on 16/11/2018.
  */
 public class Document implements DocumentInterface {
 
-    private final FileWriter fw;
+    private final Writer bw;
     private final BufferedReader br;
     private final File file;
 
@@ -21,15 +21,15 @@ public class Document implements DocumentInterface {
 
     public Document(File file) throws IOException {
         this.file = file;
-        this.fw = new FileWriter(file);
+        this.bw = new FileWriter(file,false);
         this.br = new BufferedReader(new FileReader(file));
     }
 
     @Override
     public void write(String contentToBeWritten) {
         try {
-            fw.write(contentToBeWritten);
-            fw.flush();
+            bw.write(contentToBeWritten);
+            bw.flush();
         } catch (IOException ex) {
             ex.printStackTrace();
         }
@@ -37,7 +37,19 @@ public class Document implements DocumentInterface {
 
     @Override
     public void write(Integer lineNumber, String valueToBeWritten) {
-
+//        try {
+//            String result = "";
+//            String[] input = this.read().split("\n");
+//            input[lineNumber]=valueToBeWritten;
+//            for (String str: input) {
+//                result += str;
+//                result += "\n";
+//            }
+//            bw.write(result);
+//            bw.flush();
+//        } catch (IOException ex) {
+//            ex.printStackTrace();
+//        }
     }
 
     @Override
@@ -46,16 +58,15 @@ public class Document implements DocumentInterface {
     }
 
     @Override
-    public String read() throws FileNotFoundException {
-        String result="";
+    public String read() {
+        byte[] result = null;
         try{
             String st;
-            while ((st = br.readLine()) != null)
-                result += st;}
+          result =Files.readAllBytes(file.toPath());}
         catch (IOException e){
             System.out.println("File not found for buffered reader.");
         }
-        return result;
+        return new String(result);
     }
 
     @Override
@@ -64,19 +75,25 @@ public class Document implements DocumentInterface {
 
     @Override
     public void overWrite(String content) {
+        try {
+            bw.write(content);
+            bw.flush();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
     }
 
     public List<String> toList() {
-        return null;
+       return new ArrayList<String>(Arrays.asList(this.read().split("\n")));
     }
 
     @Override
     public File getFile() {
-        return null;
+       return this.file;
     }
 
     @Override
     public String toString() {
-        return null;
+        return this.getFile() + "{" + this.read() +"}";
     }
 }