java - 当我在Java Paint程序中更改颜色时，整个颜色也会更改(Whole Colors change when I change Colors in my Java Paint Program)

Question

I created a program in Java using JPanel and Graphics.

(我使用JPanel和Graphics在Java中创建了一个程序。)

This is simple Paint Panel program in which things draw when we drag mouse and when we want to make line with different color simply just press the button in a panel but the problem is that when I press a button in panel and drag the mouse whole components present in a panel turns into that color (Button' Color).

(这是一个简单的“ Paint Panel”程序，当您拖动鼠标并想用不同的颜色绘制线条时，只需在面板上按一下按钮即可绘制内容，但问题是当我在面板上按一个按钮并拖动鼠标整个组件时面板中显示的颜色变为该颜色（“按钮”颜色）。)

Code:

(码：)

public class PaintAssign extends JPanel {
    private ArrayList<Point> points= new ArrayList<>();
    private ArrayList<Point> points2= new ArrayList<>();
    public final JButton[] panelButton=new JButton[5];
    public String[] colors={"RED","BLUE","GREEN","YELLOW","CYAN"};
    int x=0;

    public PaintAssign()
    {  addMouseMotionListener(
        new MouseMotionAdapter(){
           @Override
            public void mouseDragged(MouseEvent e)
            {

                points.add(e.getPoint());

                repaint();
            }
        });

        addMouseListener(
        new MouseAdapter(){

       });

        for (int i = 0; i < 5; i++) {
            Rectangle r = new Rectangle(22, 22);                
            panelButton[i] = new JButton();
            panelButton[i].setText(colors[i]);
            panelButton[i].setOpaque(true);
            panelButton[i].setBounds(r);
            this.add(panelButton[i]);
            this.setVisible(true);
        }

        mouseAction handle=new mouseAction();
        panelButton[0].addActionListener(handle);
        panelButton[1].addActionListener(handle);
        panelButton[2].addActionListener(handle);
        panelButton[3].addActionListener(handle);
        panelButton[4].addActionListener(handle);

   }

   private class mouseAction implements ActionListener
    {
       @Override
        public void actionPerformed(ActionEvent e)
        {
            if(e.getSource()==panelButton[0])
            {
                x=1;
            }
            else if(e.getSource()==panelButton[1])
            {
                x=2;
            }
            else if(e.getSource()==panelButton[2])
            {

                x=3;
            }

            else if(e.getSource()==panelButton[3])
            {
                x=4;
            }
            else if(e.getSource()==panelButton[4])
            {

                x=5;
             }
        }

    }

   public void paintComponent(Graphics g)
    {
        super.paintComponent(g);
        if(x==0)
        {
            g.setColor(Color.BLACK);
        }
        else if(x==1)
        {
            g.setColor(Color.RED);
        }

        else if(x==2)
        {
            g.setColor(Color.BLUE);
        }
        else if(x==3)
        {
            g.setColor(Color.GREEN);
        }
        else if(x==4)
        {
            g.setColor(Color.YELLOW);
        }else if(x==5)
        {
            g.setColor(Color.CYAN);
        }



        for(Point i:points)
        {
            g.fillOval(i.x,i.y,15,15);
        }


    }

  ask by Abdullah Ikram translate from so

Answer 1

You didn' provide the repaint() method, but my guess is, since you record all your points to the same list, all points are redrawn in the same color.

(您没有提供repaint（）方法，但是我的猜测是，由于您将所有点记录到同一列表中，因此所有点都以相同颜色重新绘制。)

What you need are separate lists for every component you draw, managed in a way that you can access that list when the component is selected.

(您需要的是绘制的每个组件的单独列表，以一种在选定组件时可以访问该列表的方式进行管理。)

I'm not sure if I understood your problem correctly though, maybe you could provide more details.

(我不确定我是否正确理解了您的问题，也许您可??以提供更多详细信息。)