Added find endpoint

src/main/java/net/tokishu/note/controller/NotesController.java

@@ -18,6 +18,11 @@ public class NotesController {
         return noteService.getAll();
     }
 
+    @GetMapping("/note/{id}")
+    public Note find(@PathVariable Long id){
+        return noteService.find(id);
+    }
+
     @PostMapping("/note")
     public Note add(@RequestBody Note note){
         return noteService.add(note);

src/main/java/net/tokishu/note/service/NoteService.java

@@ -1,7 +1,9 @@
 package net.tokishu.note.service;
 
 import net.tokishu.note.model.Note;
+import org.springframework.http.HttpStatus;
 import org.springframework.stereotype.Service;
+import org.springframework.web.server.ResponseStatusException;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -17,6 +19,16 @@ public class NoteService {
         return notes;
     }
 
+    public Note find(Long id) {
+        for (Note note : notes) {
+            if (note.getId().equals(id)) {
+                return note;
+            }
+        }
+        throw new ResponseStatusException(HttpStatus.NOT_FOUND, "Note not found");
+    }
+
+
     public Note add(Note note){
         note.setId(idGenerator.getAndIncrement());
         notes.add(note);