Added new Class Field instead of JPanel to safe Childobject

src/main/java/src/Field.java

@@ -0,0 +1,34 @@
+package src;
+
+import javax.swing.*;
+
+public class Field extends JPanel {
+    private int x;
+    private int y;
+
+    private JLabel jLabel;
+
+    public JLabel getjLabel() {
+        return jLabel;
+    }
+
+    public void setMyJLabel(JLabel jLabel){
+        this.jLabel = jLabel;
+    }
+
+    public int getMyX() {
+        return x;
+    }
+
+    public int getMyY() {
+        return y;
+    }
+
+    public void setMyX(int x) {
+        this.x = x;
+    }
+
+    public void setMyY(int y) {
+        this.y = y;
+    }
+}

src/main/java/src/GameField.java

@@ -9,10 +9,10 @@ import java.awt.event.MouseListener;
 public class GameField extends JPanel {
 
     private Notes[][] noteField;
-    private JPanel[][] gameField;
+    private Field[][] gameField;
     private JLabel[][] labelField;
 
-    private JPanel activePanel = null;
+    private Field activePanel = null;
 
     private static final Color colorDefault = new Color(100, 100, 255, 255);
     private static final Color colorOnEntered = new Color(0, 0, 255, 100);
@@ -30,7 +30,7 @@ public class GameField extends JPanel {
         return labelField;
     }
 
-    public JPanel getActivePanel() {
+    public Field getActivePanel() {
         return activePanel;
     }
 
@@ -48,7 +48,7 @@ public class GameField extends JPanel {
         this.setVisible(true);
         this.setLayout(null);
 
-        gameField = new JPanel[nrOfFields][];
+        gameField = new Field[nrOfFields][];
         labelField = new JLabel[nrOfFields][];
         noteField = new Notes[nrOfFields][];
 
@@ -56,14 +56,17 @@ public class GameField extends JPanel {
 
         for (int i = 0, addI = 1; i < nrOfFields; i++) {
 
-            gameField[i] = new JPanel[nrOfFields];
+            gameField[i] = new Field[nrOfFields];
             labelField[i] = new JLabel[nrOfFields];
             noteField[i] = new Notes[nrOfFields];
 
             for (int j = 0, addJ = 1; j < nrOfFields; j++) {
 
-                JPanel panel = gameField[i][j];
-                gameField[i][j] = new JPanel();
+
+                gameField[i][j] = new Field();
+                gameField[i][j].setMyY(j);
+                gameField[i][j].setMyX(i);
+                gameField[i][j] = new Field();
                 gameField[i][j].setBorder(new LineBorder(Color.BLACK, 2));
                 gameField[i][j].setLayout(null);
                 gameField[i][j].setBounds(
@@ -79,6 +82,7 @@ public class GameField extends JPanel {
                 gameField[i][j].add(noteField[i][j]);
 
                 JLabel lf = labelField[i][j];
+                gameField[i][j].setMyJLabel(lf);
                 labelField[i][j] = new JLabel("", SwingConstants.CENTER);
                 labelField[i][j].setBounds(0, 0, size, size);
                 labelField[i][j].setBackground(Color.GREEN);
@@ -98,7 +102,8 @@ public class GameField extends JPanel {
 
                     @Override
                     public void mousePressed(MouseEvent e) {
-                        JPanel component = (JPanel) e.getComponent();
+                        Field component = (Field) e.getComponent();
+
                         if (activePanel == null) {
                             activePanel = component;
                         } else {
@@ -177,4 +182,9 @@ public class GameField extends JPanel {
 
         }
     }
+
+    public JLabel getActiveLabel(){
+        JLabel jLabel = getActivePanel().getjLabel();
+        return jLabel;
+    }
 }