通过扩展JPanel来画板

import javax.swing.*;
import java.awt.Graphics;

class GoBoard extends JPanel{
    private int lines;

    public GoBoard(){
        this.lines = 9;
    }

    public GoBoard(int pLines){
        this.lines = pLinien;
    }

    public void paint(Graphics g){
        super.paint(g);

        int d = 0;
        int h = 0;

        for(int i = 0; i < this.lines+1; i++){
            g.drawLine(0,h, getWidth(), h);
            g.drawLine(h,0,h,getHeight());

            h += getHeight()/this.lines;
        }
    }
}