java - 使用 Java 创建一个正方形的轮廓而不使用 shape 类

Question

我正在尝试在不使用 shape 类的情况下创建方形轮廓。基本上归功于旧时尚数学。我有一个在这里创建一个圆圈：

public class CircleDemo {


public static void main(String[] args) {
Display panel = new Display(10, 2);
drawCircle(panel);
}

public static void drawCircle(Display panel) {
int centerX = panel.getWidth() / 2;
int centerY = panel.getHeight() / 2;

// Draw a circle starting at the top and going clock wise
double degAng = 270;
double radius = 150;
double x, y, radAng;
while ( true ) {

    radAng = ( degAng * Math.PI ) / 180;
    x = centerX + radius * Math.cos ( radAng );
    y = centerY + radius * Math.sin ( radAng );
    panel.drawNextPixel ( (int) x, (int) y );
    degAng += 0.15;
    // System.out.println ( "x = " + x + ", y = " + y );
}

}

}