为什么我的2D迷宫没有用JComponent绘制？

Question

UPDATE: I Figured out the problem and wrote it out below.If you'd like to see the full compliable code here it is on GitHub: https://github.com/scohen40/cohen-mco364-fall-2018/tree/mazeGUI/src/main/java/cohen/maze

I have a 2D Array of Cells, each with 4 walls. My generateMaze() class starts at a random point and digs out a maze. That part works correctly, and when I print out the maze in the console everything is fine.
My next goal is to have the maze painted out with a JComponent in a JPanel. The problem is that all I'm getting is one thick-lined box in the top left corner. Here's the painting code:

public class AnimatedMaze extends JComponent {
private Maze maze;
private int componentHeight;
private int componentWidth;
private int seventhHeight;
private int seventhWidth;

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

    componentHeight = this.getHeight();
    componentWidth = this.getWidth();
    seventhHeight = componentHeight/7;
    seventhWidth = componentWidth/7;

    maze = new Maze(7, 7);
    g.setColor(Color.black);

    paintMaze(g);

}

/**
 * The paintMaze() method runs through the generated maze and paints the existing walls.
 * @param g
 */
void paintMaze(Graphics g) {
    for (int x = 0; x < maze.getHeight(); x++) {
        System.out.println("|");
        for (int y = 0; y < maze.getWidth(); y++) {
            Cell current = maze.getMaze()[x][y];
            if(current.isWestWall()) {
                g.drawLine(x, y, x, y + seventhHeight);
            }
            if(current.isNorthWall()){
                g.drawLine(x, y,x + seventhWidth, y);
            }
            if(current.isEastWall()) {
                g.drawLine(x + seventhWidth, y, x+ seventhWidth, y + seventhHeight);
            }
            if(current.isSouthWall()) {
                g.drawLine(x, y + seventhHeight, x + seventhWidth, y +seventhHeight);
            }

        }
    }
}

}

You can see in the console the generated maze but in the JPanel it'sjust a box.

Answer 1

在绘制代码中，您需要将每个x和y坐标乘以'seventhHeight'，否则就无法绘制正确的坐标了。

Answer 2

Building on the answer by Krzysztof Cichocki, realized that coordinates work differently from rows and tables. I switched the x's for y's and vice versa, after multiplying everything by seventhHeight. Also any additions that I did to any coordinate is always seventhHeight now, to make everything proportional. Here's the current code for the painting method:

    void paintMaze(Graphics g) {
    for (int x = 0; x < maze.getHeight(); x++) {
        System.out.println("|");
        for (int y = 0; y < maze.getWidth(); y++) {
            Cell current = maze.getMaze()[x][y];
            if(current.isWestWall()) {
                g.setColor(Color.black);
                g.drawLine((y+1)*seventhHeight, x*seventhHeight, (y+1)*seventhHeight, x*seventhHeight + seventhHeight);
            }

            if(current.isNorthWall()){
                g.drawLine((y+1)*seventhHeight, x*seventhHeight,(y+1)*seventhHeight + seventhHeight, x*seventhHeight);
            }

            if(current.isEastWall()) {
                g.drawLine((y+1)*seventhHeight + seventhHeight, x*seventhHeight, (y+1)*seventhHeight + seventhHeight, x*seventhHeight + seventhHeight);
            }

            if(current.isSouthWall()) {
                g.drawLine((y+1)*seventhHeight, x*seventhHeight + seventhHeight, (y+1)*seventhHeight + seventhHeight, x*seventhHeight +seventhHeight);
            }

        }
    }
}

This is now what happens: