java - 2D ルービック キューブを完成させるには助けが必要です

Question

基本的な 2D ルービック キューブ 3x3 を作成しようとしていますが、正方形の色に問題があります。位置を混ぜ始めると、色がそれに応じて変化せず、修正方法がわかりません。

これがコードです。ご協力と時間を割いていただき、誠にありがとうございました。

@Override
public void actionPerformed(ActionEvent e) {
    if(e.getSource() == upLeft){
        Collections.swap(squaresList, 0, 27);
        Collections.swap(squaresList, 3, 30);
        Collections.swap(squaresList, 6, 33);

        Collections.swap(squaresList, 27, 18);
        Collections.swap(squaresList, 30, 21);
        Collections.swap(squaresList, 33, 24);

        Collections.swap(squaresList, 18, 9);
        Collections.swap(squaresList, 21, 12);
        Collections.swap(squaresList, 24, 15);

        // HERE IS WHERE I THINK THE PROBLEM IS...BUT I CANT SEE PAST THE PROBLEM
        // I TRIED USING HASHMAP SO EACH SQUARE HAS A UNIQUE CODE FOR ITS COLOR BUT DIDNT WORK OUT...
        for(int i = 0; i < squaresList.size(); i++){
            if(i <= 8){
                squaresList.get(i).setBackground(Color.WHITE); 
            }else if(i >= 9 && i <= 17){
                squaresList.get(i).setBackground(Color.YELLOW);
            }else if(i > 17 && i <= 26){
                squaresList.get(i).setBackground(Color.BLUE);
            }else if(i > 26 && i <= 35){
                squaresList.get(i).setBackground(Color.RED);
            }else if(i > 35 && i <= 44){
                squaresList.get(i).setBackground(Color.GREEN);
            }else if(i > 44 && i <= 53){
                squaresList.get(i).setBackground(Color.ORANGE);
            } 
        }
    }

    if(e.getSource() == upLeftRight){
        Collections.swap(squaresList, 0, 45);
        Collections.swap(squaresList, 1, 46);
        Collections.swap(squaresList, 2, 47);

        Collections.swap(squaresList, 45, 18);
        Collections.swap(squaresList, 46, 19);
        Collections.swap(squaresList, 47, 20);

        Collections.swap(squaresList, 18, 36);
        Collections.swap(squaresList, 19, 37);
        Collections.swap(squaresList, 20, 38);

        // HERE IS WHERE I THINK THE PROBLEM IS...BUT I CANT SEE PAST THE PROBLEM
        // I TRIED USING HASHMAP SO EACH SQUARE HAS A UNIQUE CODE FOR ITS COLOR BUT DIDNT WORK OUT...
        for(int i = 0; i < squaresList.size(); i++){
            if(i <= 8){
                squaresList.get(i).setBackground(Color.WHITE); 
            }else if(i >= 9 && i <= 17){
                squaresList.get(i).setBackground(Color.YELLOW);
            }else if(i > 17 && i <= 26){
                squaresList.get(i).setBackground(Color.BLUE);
            }else if(i > 26 && i <= 35){
                squaresList.get(i).setBackground(Color.RED);
            }else if(i > 35 && i <= 44){
                squaresList.get(i).setBackground(Color.GREEN);
            }else if(i > 44 && i <= 53){
                squaresList.get(i).setBackground(Color.ORANGE);
            } 
        }
    }           
}