add io.ToDoListFromToJSON,

ToDo-List-Editor now can save and load ToDo-lists from&to JSON

plan.txt

@@ -1,7 +1,8 @@
 Funktionen:
 -ToDo deadline#
 -ToDo-Liste nach Datum/Uhrzeit sortieren#
--ToDo-Liste abspeichern
+-ToDo-Liste als JSON abspeichern#
+-ToDo-Liste von JSON laden#
 -ToDo hinzufügen#
 -ToDo abhaken#
 -ToDo löschen#

theList.json

@@ -0,0 +1,8 @@
+[
+  {
+    "id": 0,
+    "content": "asdfgh",
+    "done": false,
+    "deadline": "Feb 2, 2022, 12:00:00 AM"
+  }
+]

todolist_editor/pom.xml

@@ -26,6 +26,11 @@
       <version>4.13.1</version>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>com.google.code.gson</groupId>
+      <artifactId>gson</artifactId>
+      <version>2.8.7</version>
+  </dependency>
   </dependencies>
 
   <build>

todolist_editor/src/main/java/de/dejan/todolist/Main.java

@@ -4,6 +4,8 @@ import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.util.*;
 
+import de.dejan.todolist.io.ToDoListFromToJSON;
+
 
 
 public class Main{
@@ -12,12 +14,23 @@ public class Main{
 
     public static void main( String[] args ){
 
+        //ArrayList<ToDo> tasks_ = ToDoListFromToJSON.loadToDoList("theList.json");
+
+        for (int i = 0; i < ToDoListFromToJSON.loadToDoList("theList.json").size(); i++) {
+            tasks.add(ToDoListFromToJSON.loadToDoList("theList.json").get(i));
+        }
+        
         while (true) {
             menu();
         }
         
     }
 
+    public static void exit(){
+        ToDoListFromToJSON.saveToDoList(tasks, "theList.json");
+        System.exit(0);
+    }
+
     public static void menu(){
 
         System.out.println("\n[1]Neues ToDo hinzufügen");
@@ -36,7 +49,7 @@ public class Main{
             case 3: done(); break;
             case 4: delTask(); break;
             case 5: sortByDeadline(); break;
-            case 6: System.exit(0);
+            case 6: exit();
         }
 
     }

todolist_editor/src/main/java/de/dejan/todolist/ToDo.java

@@ -4,59 +4,59 @@ import java.util.*;
 
 public class ToDo{
     
-    private int theID;
-    private String theContent;
-    private boolean theDone;
+    private int id;
+    private String content;
+    private boolean done;
     
     // https://docs.oracle.com/javase/8/docs/api/java/util/Date.html
     // https://stackoverflow.com/questions/5927109/sort-objects-in-arraylist-by-date
-    private Date theDeadline;
+    private Date deadline;
 
 
     public ToDo(int id, String content, boolean done, Date deadline){
-        theID=id;
-        theContent=content;
-        theDone=done;
-        theDeadline=deadline;
+        this.id=id;
+        this.content=content;
+        this.done=done;
+        this.deadline=deadline;
     }
 
     public ToDo(int id, String content, boolean done){
-        theID=id;
-        theContent=content;
-        theDone=done;
+        this.id=id;
+        this.content=content;
+        this.done=done;
     }
 
     //get-& set-methods
     public void setID(int id){
-        theID=id;
+        this.id=id;
     }
 
     public int getID(){
-        return theID;
+        return id;
     }
 
     public void setContent(String content){
-        theContent=content;
+        this.content=content;
     }
 
     public String getContent(){
-        return theContent;
+        return this.content;
     }
 
     public void setDone(boolean done){
-        theDone=done;
+        this.done=done;
     }
 
     public boolean getDone(){
-        return theDone;
+        return this.done;
     }
 
     public void setDeadline(Date d){
-        theDeadline=d;
+        this.deadline=d;
     }
 
     public Date getDeadline(){
-        return theDeadline;
+        return this.deadline;
     }
 
 }

todolist_editor/src/main/java/de/dejan/todolist/io/ToDoListFromToJSON.java

@@ -0,0 +1,50 @@
+package de.dejan.todolist.io;
+
+import de.dejan.todolist.*;
+//import jdk.internal.org.jline.utils.InputStreamReader;
+
+import java.io.*;
+import java.lang.reflect.Type;
+import java.util.*;
+import com.google.gson.*;
+import com.google.gson.reflect.TypeToken;
+
+public class ToDoListFromToJSON {
+    
+
+    public static void saveToDoList(ArrayList<ToDo> tasks, String listname){
+        Gson gson=new GsonBuilder().setPrettyPrinting().create();
+
+        
+        try {
+            FileWriter fw=new FileWriter(listname);
+            gson.toJson(tasks, fw);
+            fw.close();
+        } catch (JsonIOException e) {
+            //e.printStackTrace();
+        } catch (IOException e) {
+            //e.printStackTrace();
+        }
+
+    }
+    
+    public static ArrayList<ToDo> loadToDoList(String listname){
+        ArrayList<ToDo> tasks=new ArrayList<ToDo>();
+        Gson gson=new Gson();
+
+        try {
+            BufferedReader br =new BufferedReader(new InputStreamReader(new FileInputStream(listname)));
+            Type list=new TypeToken<ArrayList<ToDo>>(){}.getType();
+
+            tasks=gson.fromJson(br, list);
+            br.close();
+
+        } catch (Exception e) {
+            
+        }
+        
+
+        return tasks;
+    }
+
+}