在paint（）方法之外使用Graphics对象进行分形java

Question

I am trying to draw a fractal tree, and currently my design gleamed from other people's work is using graphics objects outside of the paint() method for recursion. Will this result in anything at all?

Answer 1

您可以从BufferedImage获取Graphics对象（甚至是支持数组）并在其上绘制，然后在paintComponent（）中绘制图像。

Answer 2

You need to pass the Graphics context as a parameter to your drawMethod(Graphics g) , then invoke than method withing the paint method. drawMethod(g); , g being the Graphics context of the paint method

public class SomeClass {
    public void drawMethod(Graphics g) {
        g.drawString("Hello World", 50, 50);
    }
}

public class DrawPanel extends JPanel {
    SomeClass someClass = new SomeClass();

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);

        someClass.drawMethod(g);
    }
}