Remove update and save function and set delete on Table

src/main/java/DB/Competition.java

@@ -142,19 +142,4 @@ public class Competition extends Table {
         }
         return list;
     }
-
-    @Override
-    public boolean save() {
-        return false;
-    }
-
-    @Override
-    public boolean update() {
-        return false;
-    }
-
-    @Override
-    public boolean delete() {
-        return false;
-    }
 }

src/main/java/DB/DB.java

@@ -87,4 +87,18 @@ public class DB {
         }
         return false;
     }
+
+    static public boolean delete(String table, String check, String checkValue) {
+        try {
+            PreparedStatement ps = DB.connection.prepareStatement("DELETE FROM "+table+" WHERE "+check+" = ?");
+            ps.setString(1, checkValue);
+            int r = ps.executeUpdate();
+            ps.close();
+            if (r > 0)
+                return true;
+        } catch (SQLException e) {
+            return false;
+        }
+        return false;
+    }
 }

src/main/java/DB/Movie.java

@@ -69,16 +69,6 @@ public class Movie extends Table {
         return list;
     }
 
-    @Override
-    public boolean save() {
-        return false;
-    }
-
-    @Override
-    public boolean update() {
-        return false;
-    }
-
     @Override
     public boolean delete() {
         return false;

src/main/java/DB/Projection.java

@@ -63,16 +63,6 @@ public class Projection extends Table {
         return list;
     }
 
-    @Override
-    public boolean save() {
-        return false;
-    }
-
-    @Override
-    public boolean update() {
-        return false;
-    }
-
     @Override
     public boolean delete() {
         return false;

src/main/java/DB/Room.java

@@ -65,19 +65,4 @@ public class Room extends Table {
         }
         return list;
     }
-
-    @Override
-    public boolean save() {
-        return false;
-    }
-
-    @Override
-    public boolean update() {
-        return false;
-    }
-
-    @Override
-    public boolean delete() {
-        return false;
-    }
 }

src/main/java/DB/Slot.java

@@ -46,19 +46,4 @@ public class Slot extends Table {
         }
         return list;
     }
-
-    @Override
-    public boolean save() {
-        return false;
-    }
-
-    @Override
-    public boolean update() {
-        return false;
-    }
-
-    @Override
-    public boolean delete() {
-        return false;
-    }
 }

src/main/java/DB/Table.java

@@ -5,9 +5,6 @@ public abstract class Table {
     static protected String tableName;
     static protected String check;
     protected String checkValue;
-    abstract public boolean save();
-    abstract public boolean update();
-    abstract public boolean delete();
 
     protected <T> T get(Class<T> cl, String value) {
         return DB.get(cl, tableName, value, check, checkValue);
@@ -16,4 +13,8 @@ public abstract class Table {
     protected boolean set(String value, String newValue) {
         return DB.set(tableName, value, newValue, check, checkValue);
     }
+
+    public boolean delete() {
+        return DB.delete(tableName, check, checkValue);
+    }
 }

src/main/java/DB/User.java

@@ -81,19 +81,4 @@ public class User extends Table {
         }
         return list;
     }
-
-    @Override
-    public boolean save() {
-        return false;
-    }
-
-    @Override
-    public boolean update() {
-        return false;
-    }
-
-    @Override
-    public boolean delete() {
-        return false;
-    }
 }

src/main/java/DB/UserType.java

@@ -43,19 +43,4 @@ public class UserType extends Table {
         }
         return list;
     }
-
-    @Override
-    public boolean save() {
-        return false;
-    }
-
-    @Override
-    public boolean update() {
-        return false;
-    }
-
-    @Override
-    public boolean delete() {
-        return false;
-    }
 }

src/main/java/ProjectionPlanning/Main.java

@@ -7,8 +7,6 @@ public class Main {
     public static void main(String[] args) {
         //new GUI();
         DB.connect();
-        Competition u = new Competition("Court Métrage");
-        System.out.println(Competition.getAll());
-        System.out.println(u.getUsers());
+        System.out.println(new User("test@test.com").delete());
     }
 }