LabWork04 completed

Third stage: Completed
Beginning advanced task

DrawingObjectArtillery.java

@@ -1,12 +1,16 @@
 import java.awt.*;
 
 public class DrawingObjectArtillery implements IDrawingObject {
-    private DrawingArtillery _artillery = null;
+    private DrawingArtillery _artillery;
 
     public DrawingObjectArtillery(DrawingArtillery artillery) {
         _artillery = artillery;
     }
 
+    public DrawingArtillery getArtillery() {
+        return _artillery;
+    }
+
     public float getStep() {
         if (_artillery != null && _artillery.artillery != null) {
             return _artillery.artillery.getStep();

FormArtillery.java

@@ -90,6 +90,12 @@ public class FormArtillery extends JDialog {
         });
     }
 
+    public FormArtillery(DrawingArtillery artillery) {
+        this();
+        _artillery = artillery;
+        repaint();
+    }
+
     public DrawingArtillery getSelectedArtillery() {
         return selectedArtillery;
     }

FormMapWithSetArtilleries.form

@@ -3,7 +3,7 @@
   <grid id="27dc6" binding="paneArtilleries" layout-manager="GridLayoutManager" row-count="1" column-count="2" same-size-horizontally="false" same-size-vertically="false" hgap="-1" vgap="-1">
     <margin top="0" left="0" bottom="0" right="0"/>
     <constraints>
-      <xy x="20" y="20" width="613" height="400"/>
+      <xy x="20" y="20" width="649" height="532"/>
     </constraints>
     <properties/>
     <border type="none"/>
@@ -11,13 +11,13 @@
       <grid id="fcfe1" binding="pictureBox" layout-manager="GridLayoutManager" row-count="1" column-count="1" same-size-horizontally="false" same-size-vertically="false" hgap="-1" vgap="-1">
         <margin top="0" left="0" bottom="0" right="0"/>
         <constraints>
-          <grid row="0" column="0" row-span="1" col-span="1" vsize-policy="3" hsize-policy="3" anchor="0" fill="3" indent="0" use-parent-layout="false"/>
+          <grid row="0" column="0" row-span="1" col-span="1" vsize-policy="7" hsize-policy="7" anchor="0" fill="3" indent="0" use-parent-layout="false"/>
         </constraints>
         <properties/>
         <border type="none"/>
         <children/>
       </grid>
-      <grid id="f232" binding="toolsGroup" layout-manager="GridLayoutManager" row-count="9" column-count="4" same-size-horizontally="false" same-size-vertically="false" hgap="-1" vgap="-1">
+      <grid id="f232" binding="toolsGroup" layout-manager="GridLayoutManager" row-count="10" column-count="4" same-size-horizontally="false" same-size-vertically="false" hgap="-1" vgap="-1">
         <margin top="0" left="0" bottom="0" right="0"/>
         <constraints>
           <grid row="0" column="1" row-span="1" col-span="1" vsize-policy="3" hsize-policy="0" anchor="0" fill="3" indent="0" use-parent-layout="false"/>
@@ -38,25 +38,9 @@
               <grid row="0" column="1" row-span="1" col-span="3" vsize-policy="1" hsize-policy="6" anchor="0" fill="1" indent="0" use-parent-layout="false"/>
             </constraints>
           </hspacer>
-          <vspacer id="352bc">
-            <constraints>
-              <grid row="5" column="0" row-span="2" col-span="1" vsize-policy="6" hsize-policy="1" anchor="0" fill="2" indent="0" use-parent-layout="false"/>
-            </constraints>
-          </vspacer>
-          <component id="6a0f5" class="javax.swing.JComboBox" binding="comboBoxMapSelector">
-            <constraints>
-              <grid row="1" column="1" row-span="1" col-span="3" vsize-policy="0" hsize-policy="2" anchor="8" fill="1" indent="0" use-parent-layout="false"/>
-            </constraints>
-            <properties>
-              <model>
-                <item value="Простая карта"/>
-                <item value="Лесная карта"/>
-              </model>
-            </properties>
-          </component>
           <component id="52049" class="javax.swing.JButton" binding="buttonAddArtillery">
             <constraints>
-              <grid row="2" column="1" row-span="1" col-span="3" vsize-policy="0" hsize-policy="3" anchor="0" fill="1" indent="0" use-parent-layout="false"/>
+              <grid row="2" column="0" row-span="1" col-span="4" vsize-policy="0" hsize-policy="3" anchor="0" fill="1" indent="0" use-parent-layout="false"/>
             </constraints>
             <properties>
               <text value="Добавить артиллерию"/>
@@ -64,7 +48,7 @@
           </component>
           <component id="2f9ed" class="javax.swing.JFormattedTextField" binding="textBoxPosition">
             <constraints>
-              <grid row="3" column="1" row-span="1" col-span="3" vsize-policy="0" hsize-policy="6" anchor="8" fill="1" indent="0" use-parent-layout="false">
+              <grid row="3" column="0" row-span="1" col-span="4" vsize-policy="0" hsize-policy="6" anchor="8" fill="1" indent="0" use-parent-layout="false">
                 <preferred-size width="150" height="-1"/>
               </grid>
             </constraints>
@@ -72,7 +56,7 @@
           </component>
           <component id="1dbb5" class="javax.swing.JButton" binding="buttonRemoveArtillery">
             <constraints>
-              <grid row="4" column="1" row-span="1" col-span="3" vsize-policy="0" hsize-policy="3" anchor="0" fill="1" indent="0" use-parent-layout="false"/>
+              <grid row="4" column="0" row-span="1" col-span="4" vsize-policy="0" hsize-policy="3" anchor="0" fill="1" indent="0" use-parent-layout="false"/>
             </constraints>
             <properties>
               <actionCommand value=""/>
@@ -81,7 +65,7 @@
           </component>
           <component id="4e6ca" class="javax.swing.JButton" binding="buttonShowStorage">
             <constraints>
-              <grid row="5" column="1" row-span="1" col-span="3" vsize-policy="0" hsize-policy="3" anchor="0" fill="1" indent="0" use-parent-layout="false"/>
+              <grid row="5" column="0" row-span="1" col-span="4" vsize-policy="0" hsize-policy="3" anchor="0" fill="1" indent="0" use-parent-layout="false"/>
             </constraints>
             <properties>
               <text value="Посмотреть хранилище"/>
@@ -89,7 +73,7 @@
           </component>
           <component id="51371" class="javax.swing.JButton" binding="buttonShowOnMap">
             <constraints>
-              <grid row="6" column="1" row-span="1" col-span="3" vsize-policy="0" hsize-policy="3" anchor="0" fill="1" indent="0" use-parent-layout="false"/>
+              <grid row="6" column="0" row-span="1" col-span="4" vsize-policy="0" hsize-policy="3" anchor="0" fill="1" indent="0" use-parent-layout="false"/>
             </constraints>
             <properties>
               <text value="Посмотреть карту"/>
@@ -97,7 +81,7 @@
           </component>
           <component id="fb3e4" class="javax.swing.JButton" binding="buttonUp">
             <constraints>
-              <grid row="7" column="1" row-span="1" col-span="3" vsize-policy="0" hsize-policy="0" anchor="0" fill="1" indent="0" use-parent-layout="false">
+              <grid row="8" column="1" row-span="1" col-span="3" vsize-policy="0" hsize-policy="0" anchor="0" fill="1" indent="0" use-parent-layout="false">
                 <minimum-size width="30" height="30"/>
                 <preferred-size width="30" height="30"/>
                 <maximum-size width="30" height="30"/>
@@ -112,7 +96,7 @@
           </component>
           <component id="328f6" class="javax.swing.JButton" binding="buttonDown">
             <constraints>
-              <grid row="8" column="2" row-span="1" col-span="1" vsize-policy="0" hsize-policy="3" anchor="0" fill="1" indent="0" use-parent-layout="false">
+              <grid row="9" column="2" row-span="1" col-span="1" vsize-policy="0" hsize-policy="3" anchor="0" fill="1" indent="0" use-parent-layout="false">
                 <minimum-size width="30" height="30"/>
                 <preferred-size width="30" height="30"/>
                 <maximum-size width="30" height="30"/>
@@ -126,7 +110,7 @@
           </component>
           <component id="4f2dc" class="javax.swing.JButton" binding="buttonLeft">
             <constraints>
-              <grid row="8" column="1" row-span="1" col-span="1" vsize-policy="0" hsize-policy="3" anchor="0" fill="1" indent="0" use-parent-layout="false">
+              <grid row="9" column="1" row-span="1" col-span="1" vsize-policy="0" hsize-policy="3" anchor="0" fill="1" indent="0" use-parent-layout="false">
                 <minimum-size width="30" height="30"/>
                 <preferred-size width="30" height="30"/>
                 <maximum-size width="30" height="30"/>
@@ -141,7 +125,7 @@
           </component>
           <component id="bac06" class="javax.swing.JButton" binding="buttonRight">
             <constraints>
-              <grid row="8" column="3" row-span="1" col-span="1" vsize-policy="0" hsize-policy="3" anchor="0" fill="1" indent="0" use-parent-layout="false">
+              <grid row="9" column="3" row-span="1" col-span="1" vsize-policy="0" hsize-policy="3" anchor="0" fill="1" indent="0" use-parent-layout="false">
                 <minimum-size width="30" height="30"/>
                 <preferred-size width="30" height="30"/>
                 <maximum-size width="30" height="30"/>
@@ -154,6 +138,80 @@
               <text value=""/>
             </properties>
           </component>
+          <grid id="7448e" binding="mapsGroup" layout-manager="GridLayoutManager" row-count="6" column-count="2" same-size-horizontally="false" same-size-vertically="false" hgap="-1" vgap="-1">
+            <margin top="0" left="0" bottom="0" right="0"/>
+            <constraints>
+              <grid row="1" column="0" row-span="1" col-span="4" vsize-policy="3" hsize-policy="3" anchor="0" fill="3" indent="0" use-parent-layout="false"/>
+            </constraints>
+            <properties/>
+            <border type="none"/>
+            <children>
+              <component id="3bd55" class="javax.swing.JLabel" binding="mapsLabel">
+                <constraints>
+                  <grid row="0" column="0" row-span="1" col-span="1" vsize-policy="0" hsize-policy="0" anchor="8" fill="0" indent="0" use-parent-layout="false"/>
+                </constraints>
+                <properties>
+                  <text value="Карты"/>
+                </properties>
+              </component>
+              <hspacer id="b4c1d">
+                <constraints>
+                  <grid row="0" column="1" row-span="1" col-span="1" vsize-policy="1" hsize-policy="6" anchor="0" fill="1" indent="0" use-parent-layout="false"/>
+                </constraints>
+              </hspacer>
+              <component id="6a0f5" class="javax.swing.JComboBox" binding="comboBoxMapSelector">
+                <constraints>
+                  <grid row="2" column="0" row-span="1" col-span="2" vsize-policy="0" hsize-policy="2" anchor="8" fill="1" indent="0" use-parent-layout="false"/>
+                </constraints>
+                <properties>
+                  <model>
+                    <item value="Простая карта"/>
+                    <item value="Лесная карта"/>
+                  </model>
+                </properties>
+              </component>
+              <component id="a344e" class="javax.swing.JTextField" binding="textFieldMapName">
+                <constraints>
+                  <grid row="1" column="0" row-span="1" col-span="2" vsize-policy="0" hsize-policy="6" anchor="8" fill="1" indent="0" use-parent-layout="false">
+                    <preferred-size width="150" height="-1"/>
+                  </grid>
+                </constraints>
+                <properties/>
+              </component>
+              <component id="b8791" class="javax.swing.JButton" binding="buttonAddMap">
+                <constraints>
+                  <grid row="3" column="0" row-span="1" col-span="2" vsize-policy="0" hsize-policy="3" anchor="0" fill="1" indent="0" use-parent-layout="false"/>
+                </constraints>
+                <properties>
+                  <text value="Добавить карту"/>
+                </properties>
+              </component>
+              <component id="89547" class="javax.swing.JList" binding="listBoxMaps">
+                <constraints>
+                  <grid row="4" column="0" row-span="1" col-span="2" vsize-policy="6" hsize-policy="2" anchor="0" fill="3" indent="0" use-parent-layout="false">
+                    <preferred-size width="150" height="50"/>
+                  </grid>
+                </constraints>
+                <properties/>
+              </component>
+              <component id="643d3" class="javax.swing.JButton" binding="buttonDeleteMap">
+                <constraints>
+                  <grid row="5" column="0" row-span="1" col-span="2" vsize-policy="0" hsize-policy="3" anchor="0" fill="1" indent="0" use-parent-layout="false"/>
+                </constraints>
+                <properties>
+                  <text value="Удалить карту"/>
+                </properties>
+              </component>
+            </children>
+          </grid>
+          <component id="490e6" class="javax.swing.JButton" binding="buttonShowDeleted">
+            <constraints>
+              <grid row="7" column="0" row-span="1" col-span="4" vsize-policy="0" hsize-policy="3" anchor="0" fill="1" indent="0" use-parent-layout="false"/>
+            </constraints>
+            <properties>
+              <text value="Посмотреть удалённую артиллерию"/>
+            </properties>
+          </component>
         </children>
       </grid>
     </children>

FormMapWithSetArtilleries.java

@@ -2,14 +2,16 @@ import javax.swing.*;
 import javax.swing.text.DefaultFormatterFactory;
 import javax.swing.text.MaskFormatter;
 import java.awt.*;
-import java.awt.image.BufferedImage;
 import java.text.ParseException;
+import java.util.HashMap;
+import java.util.Optional;
+import java.util.Stack;
 
 public class FormMapWithSetArtilleries extends JFrame {
     private JPanel pictureBox;
     private JPanel toolsGroup;
     private JLabel toolsLabel;
-    private JComboBox comboBoxMapSelector;
+    private JComboBox<String> comboBoxMapSelector;
     private JButton buttonAddArtillery;
     private JPanel paneArtilleries;
     private JFormattedTextField textBoxPosition;
@@ -20,13 +22,27 @@ public class FormMapWithSetArtilleries extends JFrame {
     private JButton buttonLeft;
     private JButton buttonRight;
     private JButton buttonShowOnMap;
+    private JLabel mapsLabel;
+    private JTextField textFieldMapName;
+    private JButton buttonAddMap;
+    private JList<String> listBoxMaps;
+    private JPanel mapsGroup;
+    private JButton buttonDeleteMap;
+    private JButton buttonShowDeleted;
 
     private Image bufferedImage;
-    private MapWithSetArtilleriesGeneric<DrawingObjectArtillery, AbstractMap> _mapArtilleriesCollectionGeneric;
+    private final HashMap<String, AbstractMap> _mapsDict = new HashMap<>() {{
+        put("Простая карта", new SimpleMap());
+        put("Лесная карта", new ForestMap());
+    }};
+    private final MapsCollection _mapsCollection;
+    private final Stack<IDrawingObject> deletedObjects = new Stack<>();
 
     public FormMapWithSetArtilleries() {
         this.setTitle("Artillery");
         this.setContentPane(paneArtilleries);
+        this.setSize(640, 530);
+        this.setVisible(true);
 
         try {
             textBoxPosition.setFormatterFactory(new DefaultFormatterFactory(new MaskFormatter("##")));
@@ -34,22 +50,46 @@ public class FormMapWithSetArtilleries extends JFrame {
             e.printStackTrace();
         }
 
-        comboBoxMapSelector.addActionListener(e -> {
-            AbstractMap map = switch (((JComboBox) e.getSource()).getSelectedItem().toString()) {
-                case "Простая карта" -> new SimpleMap();
-                case "Лесная карта" -> new ForestMap();
-                default -> null;
-            };
+        _mapsCollection = new MapsCollection(pictureBox.getWidth(), pictureBox.getHeight());
 
-            if (map != null) {
-                _mapArtilleriesCollectionGeneric = new MapWithSetArtilleriesGeneric<>(pictureBox.getWidth(), pictureBox.getHeight(), map);
-            } else {
-                _mapArtilleriesCollectionGeneric = null;
+        comboBoxMapSelector.removeAllItems();
+        for (var key : _mapsDict.keySet()) {
+            comboBoxMapSelector.addItem(key);
+        }
+
+        buttonAddMap.addActionListener(e -> {
+            if (comboBoxMapSelector.getSelectedIndex() == -1 || textFieldMapName.getText() == null || textFieldMapName.getText().isEmpty()) {
+                JOptionPane.showMessageDialog(this, "Не все данные заполнены", "Ошибка", JOptionPane.ERROR_MESSAGE);
+                return;
+            }
+            if (!_mapsDict.containsKey((String)comboBoxMapSelector.getSelectedItem())) {
+                JOptionPane.showMessageDialog(this, "Нет такой карты", "Ошибка", JOptionPane.ERROR_MESSAGE);
+                return;
+            }
+            _mapsCollection.addMap(textFieldMapName.getText(), _mapsDict.get((String)comboBoxMapSelector.getSelectedItem()));
+            reloadMaps();
+        });
+
+        buttonDeleteMap.addActionListener(e -> {
+            if (listBoxMaps.getSelectedIndex() == -1) {
+                return;
+            }
+
+            if (JOptionPane.showConfirmDialog(this, "Удалить карту " + listBoxMaps.getSelectedValue() + "?", "Удаление", JOptionPane.YES_NO_OPTION) == JOptionPane.YES_OPTION) {
+                _mapsCollection.deleteMap(Optional.ofNullable(listBoxMaps.getSelectedValue()).orElse(""));
+                reloadMaps();
+            }
+        });
+
+        listBoxMaps.addListSelectionListener(e -> {
+            if (listBoxMaps.getSelectedValue() != null) {
+                bufferedImage = _mapsCollection.getMap(Optional.ofNullable(listBoxMaps.getSelectedValue()).orElse("")).showSet();
+                repaint();
             }
         });
 
         buttonAddArtillery.addActionListener(e -> {
-            if (_mapArtilleriesCollectionGeneric == null) {
+            if (listBoxMaps.getSelectedIndex() == -1) {
                 return;
             }
 
@@ -61,11 +101,11 @@ public class FormMapWithSetArtilleries extends JFrame {
             dialog.setVisible(true);
 
             if (dialog.getSelectedArtillery() != null) {
-                DrawingObjectArtillery car = new DrawingObjectArtillery(dialog.getSelectedArtillery());
-                if (_mapArtilleriesCollectionGeneric.addArtillery(car) != -1)
+                DrawingObjectArtillery artillery = new DrawingObjectArtillery(dialog.getSelectedArtillery());
+                if (_mapsCollection.getMap(Optional.ofNullable(listBoxMaps.getSelectedValue()).orElse("")).addArtillery(artillery) != -1)
                 {
                     JOptionPane.showMessageDialog(this, "Объект добавлен", "Успех", JOptionPane.INFORMATION_MESSAGE);
-                    bufferedImage = _mapArtilleriesCollectionGeneric.showSet();
+                    bufferedImage = _mapsCollection.getMap(Optional.ofNullable(listBoxMaps.getSelectedValue()).orElse("")).showSet();
                     repaint();
                 }
                 else
@@ -87,9 +127,11 @@ public class FormMapWithSetArtilleries extends JFrame {
 
             int position = Integer.parseInt(text);
 
-            if (_mapArtilleriesCollectionGeneric.removeArtilleryAt(position) != null) {
+            IDrawingObject deleted = _mapsCollection.getMap(Optional.ofNullable(listBoxMaps.getSelectedValue()).orElse("")).removeArtilleryAt(position);
+            if (deleted != null) {
+                deletedObjects.push(deleted);
                 JOptionPane.showMessageDialog(this, "Объект удалён", "Успех", JOptionPane.INFORMATION_MESSAGE);
-                bufferedImage = _mapArtilleriesCollectionGeneric.showSet();
+                bufferedImage = _mapsCollection.getMap(Optional.ofNullable(listBoxMaps.getSelectedValue()).orElse("")).showSet();
                 repaint();
             } else {
                 JOptionPane.showMessageDialog(this, "Не удалось удалить объект", "Провал", JOptionPane.INFORMATION_MESSAGE);
@@ -97,47 +139,72 @@ public class FormMapWithSetArtilleries extends JFrame {
         });
 
         buttonShowStorage.addActionListener(e -> {
-            if (_mapArtilleriesCollectionGeneric == null) {
+            if (listBoxMaps.getSelectedIndex() == -1) {
                 return;
             }
-            bufferedImage = _mapArtilleriesCollectionGeneric.showSet();
+            bufferedImage = _mapsCollection.getMap(Optional.ofNullable(listBoxMaps.getSelectedValue()).orElse("")).showSet();
             repaint();
         });
 
         buttonShowOnMap.addActionListener(e -> {
-            if (_mapArtilleriesCollectionGeneric == null) {
+            if (listBoxMaps.getSelectedIndex() == -1) {
                 return;
             }
-            bufferedImage = _mapArtilleriesCollectionGeneric.showOnMap();
+            bufferedImage = _mapsCollection.getMap(Optional.ofNullable(listBoxMaps.getSelectedValue()).orElse("")).showOnMap();
             repaint();
         });
 
+        buttonShowDeleted.addActionListener(e -> {
+            if (!deletedObjects.empty()) {
+                DrawingObjectArtillery deleted = (DrawingObjectArtillery) deletedObjects.pop();
+                FormArtillery dialog = new FormArtillery(deleted == null ? null : deleted.getArtillery());
+                dialog.setSize(800, 500);
+                dialog.setModalityType(Dialog.ModalityType.APPLICATION_MODAL);
+                dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
+
+                dialog.setVisible(true);
+            }
+        });
+
         buttonLeft.addActionListener(e -> {
-            if (_mapArtilleriesCollectionGeneric != null) {
-                bufferedImage = _mapArtilleriesCollectionGeneric.moveObject(Direction.Left);
+            if (listBoxMaps.getSelectedIndex() != -1) {
+                bufferedImage = _mapsCollection.getMap(Optional.ofNullable(listBoxMaps.getSelectedValue()).orElse("")).moveObject(Direction.Left);
                 repaint();
             }
         });
         buttonRight.addActionListener(e -> {
-            if (_mapArtilleriesCollectionGeneric != null) {
-                bufferedImage = _mapArtilleriesCollectionGeneric.moveObject(Direction.Right);
+            if (listBoxMaps.getSelectedIndex() != -1) {
+                bufferedImage = _mapsCollection.getMap(Optional.ofNullable(listBoxMaps.getSelectedValue()).orElse("")).moveObject(Direction.Right);
                 repaint();
             }
         });
         buttonUp.addActionListener(e -> {
-            if (_mapArtilleriesCollectionGeneric != null) {
-                bufferedImage = _mapArtilleriesCollectionGeneric.moveObject(Direction.Up);
+            if (listBoxMaps.getSelectedIndex() != -1) {
+                bufferedImage = _mapsCollection.getMap(Optional.ofNullable(listBoxMaps.getSelectedValue()).orElse("")).moveObject(Direction.Up);
                 repaint();
             }
         });
         buttonDown.addActionListener(e -> {
-            if (_mapArtilleriesCollectionGeneric != null) {
-                bufferedImage = _mapArtilleriesCollectionGeneric.moveObject(Direction.Down);
+            if (listBoxMaps.getSelectedIndex() != -1) {
+                bufferedImage = _mapsCollection.getMap(Optional.ofNullable(listBoxMaps.getSelectedValue()).orElse("")).moveObject(Direction.Down);
                 repaint();
             }
         });
     }
 
+    private void reloadMaps() {
+        int index = listBoxMaps.getSelectedIndex();
+
+        listBoxMaps.setListData(_mapsCollection.getKeys().toArray(new String[0]));
+        int size = listBoxMaps.getModel().getSize();
+
+        if (size > 0 && (index == -1 || index >= size)) {
+            listBoxMaps.setSelectedIndex(0);
+        } else if (index > -1 && index < size) {
+            listBoxMaps.setSelectedIndex(index);
+        }
+    }
+
     @Override
     public void paint(Graphics g) {
         super.paint(g);

MapWithSetArtilleriesGeneric.java

@@ -1,5 +1,6 @@
 import java.awt.*;
 import java.awt.image.BufferedImage;
+import java.util.Iterator;
 
 public class MapWithSetArtilleriesGeneric<T extends IDrawingObject, U extends AbstractMap> {
     public final int _pictureWidth;
@@ -12,7 +13,7 @@ public class MapWithSetArtilleriesGeneric<T extends IDrawingObject, U extends Ab
     public MapWithSetArtilleriesGeneric(int picWidth, int picHeight, U map) {
         int width = picWidth / _placeSizeWidth;
         int height = picHeight / _placeSizeHeight;
-        _setArtilleries = new SetArtilleriesGeneric<T>(width * height);
+        _setArtilleries = new SetArtilleriesGeneric<>(width * height);
         _pictureWidth = picWidth;
         _pictureHeight = picHeight;
         _map = map;
@@ -36,13 +37,8 @@ public class MapWithSetArtilleriesGeneric<T extends IDrawingObject, U extends Ab
 
     public Image showOnMap() {
         shaking();
-        for (int i = 0; i < _setArtilleries.getCount(); i++)
-        {
-            var car = _setArtilleries.get(i);
-            if (car != null)
-            {
-                return _map.createMap(_pictureWidth, _pictureHeight, car);
-            }
+        for (T artillery : _setArtilleries.getArtilleries()) {
+            return _map.createMap(_pictureWidth, _pictureHeight, artillery);
         }
         return new BufferedImage(_pictureWidth, _pictureHeight, BufferedImage.TYPE_INT_ARGB);
     }
@@ -120,14 +116,12 @@ public class MapWithSetArtilleriesGeneric<T extends IDrawingObject, U extends Ab
         int width = _pictureWidth / _placeSizeWidth;
         int height = _pictureHeight / _placeSizeHeight;
 
-        for (int i = 0; i < _setArtilleries.getCount(); i++)
+        int index = 0;
+        for (T artillery : _setArtilleries.getArtilleries())
         {
-            var artillery = _setArtilleries.get(i);
-            if (artillery != null)
-            {
-                artillery.setObject(i % width * _placeSizeWidth + 10, (height - 1 - i / width) * _placeSizeHeight + 10, _pictureWidth, _pictureHeight);
-                artillery.drawingObject(g);
-            }
+            artillery.setObject(index % width * _placeSizeWidth + 10, (height - 1 - index / width) * _placeSizeHeight + 10, _pictureWidth, _pictureHeight);
+            artillery.drawingObject(g);
+            index++;
         }
     }
 }

MapsCollection.java

@@ -0,0 +1,33 @@
+import java.util.HashMap;
+import java.util.Set;
+
+public class MapsCollection {
+    private final HashMap<String, MapWithSetArtilleriesGeneric<IDrawingObject, AbstractMap>> _mapsStorage;
+
+    private final int _pictureWidth;
+    private final int _pictureHeight;
+
+    public Set<String> getKeys() {
+        return _mapsStorage.keySet();
+    }
+
+    public MapsCollection(int pictureWidth, int pictureHeight) {
+        _mapsStorage = new HashMap<>();
+        _pictureWidth = pictureWidth;
+        _pictureHeight = pictureHeight;
+    }
+
+    public void addMap(String name, AbstractMap map) {
+        if (!_mapsStorage.containsKey(name)) {
+            _mapsStorage.put(name, new MapWithSetArtilleriesGeneric<>(_pictureWidth, _pictureHeight, map));
+        }
+    }
+
+    public void deleteMap(String name) {
+        _mapsStorage.remove(name);
+    }
+
+    public MapWithSetArtilleriesGeneric<IDrawingObject, AbstractMap> getMap(String name) {
+        return _mapsStorage.getOrDefault(name, null);
+    }
+}

Program.java

@@ -2,9 +2,7 @@ import javax.swing.*;
 
 public class Program {
     public static void main(String[] args) {
-        FormGallery form = new FormGallery();
-        form.setSize(320, 240);
-        form.setVisible(true);
+        FormMapWithSetArtilleries form = new FormMapWithSetArtilleries();
         form.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
     }
 }

SetArtilleriesGeneric.java

@@ -20,7 +20,7 @@ public class SetArtilleriesGeneric<T> {
     }
 
     public int insert(T artillery, int position) {
-        if (position < 0 || position >= getCount() || getCount() == _maxCount) {
+        if (position < 0 || position > getCount() || getCount() == _maxCount) {
             return -1;
         }