为什么点击按钮后，按钮里的图像会绘制到骰子里面

public class Game {
JFrame jFrame=new JFrame();
Dice dice1=new Dice();
Dice dice2=new Dice();
Dice dice3=new Dice();

Box BigOrSmallBox = Box.createVerticalBox();
Label label=new Label("请按下大或小按钮");
JPanel BigOrSmallSelect=new JPanel();
JPanel BigOrSmallPanel=new JPanel();
JButton big=new JButton();
JButton small=new JButton();

// JPanel BigOrSmallSelect=new JPanel();
int bigType=0;
int smallType=0;

JPanel dicePanel1=new JPanel();
JPanel dicePanel2=new JPanel();
JPanel dicePanel3=new JPanel();

DiceCanvas drawDice1=new DiceCanvas();
DiceCanvas drawDice2=new DiceCanvas();
DiceCanvas drawDice3=new DiceCanvas();
BigPaint drawBig=new BigPaint();
SmallPaint drawSmall=new SmallPaint();

public void init(){
    jFrame.setBounds(300,300,1625,875);
    jFrame.setLayout(null);
    jFrame.setResizable(false);
    BigOrSmallPanel.setLayout(null);
    BigOrSmallSelect.setLayout(null);


    BigOrSmallPanel.setBounds(50,50,750,210);
    BigOrSmallPanel.setBackground(new Color(215,228,239));
    label.setFont(new Font(Font.SERIF, Font.PLAIN, 24));
    label.setBounds(270,0,750,50);
    BigOrSmallSelect.setBounds(0,50,750,160);
    BigOrSmallSelect.setBorder(new LineBorder(Color.gray,1));
    BigOrSmallSelect.setBackground(new Color(215,228,239));
    big.setBounds(80,20,200,125);
    small.setBounds(450,20,200,125);
    BigOrSmallSelect.add(big);
    BigOrSmallSelect.add(small);
    BigOrSmallPanel.add(label);
    BigOrSmallPanel.add(BigOrSmallSelect);
    big.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            drawDice1.repaint();
            drawDice2.repaint();
            drawDice3.repaint();
        }
    });
    small.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            drawDice1.repaint();
            drawDice2.repaint();
            drawDice3.repaint();
        }
    });
    big.add(drawBig);
    small.add(drawSmall);

    dicePanel1.setLayout(null);
    dicePanel2.setLayout(null);
    dicePanel3.setLayout(null);
    drawDice1.setDice(dice1);
    drawDice2.setDice(dice2);
    drawDice3.setDice(dice3);
    drawDice1.setBounds(40,40,80,80);
    drawDice2.setBounds(40,40,80,80);
    drawDice3.setBounds(40,40,80,80);
    dicePanel1.add(drawDice1);
    dicePanel2.add(drawDice2);
    dicePanel3.add(drawDice3);
    dicePanel1.setBounds(160,345,160,160);
    dicePanel2.setBounds(320,345,160,160);
    dicePanel3.setBounds(480,345,160,160);
    dicePanel1.setBorder(new LineBorder(Color.gray,1));
    dicePanel2.setBorder(new LineBorder(Color.gray,1));
    dicePanel3.setBorder(new LineBorder(Color.gray,1));
    jFrame.add(dicePanel1);
    jFrame.add(dicePanel2);
    jFrame.add(dicePanel3);





    jFrame.add(BigOrSmallPanel);
    jFrame.setVisible(true);
}

应该是坐标设置的问题，修改一下坐标试试。