write

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

@@ -1,9 +1,15 @@
 package rocks.zipcode;
 
 import java.io.*;
+import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.LinkedList;
 import java.util.List;
+import java.util.stream.Stream;
 
 /**
  * @author leon on 16/11/2018.
@@ -24,10 +30,23 @@ public class Document implements DocumentInterface {
 
     @Override
     public void write(String contentToBeWritten) {
+        try {
+            fileWriter.write(contentToBeWritten);
+            fileWriter.close();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
     }
 
     @Override
-    public void write(Integer lineNumber, String valueToBeWritten) {
+    public void write(Integer lineNumber, String valueToBeWritten){
+       List<String> lines = toList();
+       lines.set(lineNumber, valueToBeWritten);
+      try {
+          Files.write(file.toPath(), lines);
+      } catch (IOException e){
+          System.out.println("error");
+      }
     }
 
     @Override
@@ -37,7 +56,13 @@ public class Document implements DocumentInterface {
 
     @Override
     public String read() {
-        return null;
+        String result = "";
+        try {
+               result = new String(Files.readAllBytes(Paths.get(file.getPath())));
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return result;
     }
 
     @Override
@@ -49,7 +74,14 @@ public class Document implements DocumentInterface {
     }
 
     public List<String> toList() {
-        return null;
+        List<String> lines = new ArrayList() {
+        };
+       try {
+         lines = Files.readAllLines(file.toPath());
+       } catch (IOException e) {
+           e.printStackTrace();
+       }
+        return lines;
     }
 
     @Override
@@ -61,4 +93,4 @@ public class Document implements DocumentInterface {
     public String toString() {
         return null;
     }
-}
+}