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有谁知道如何开始在java中绘制极坐标图并在此图上绘制一些点？我的意思是圆圈和线条,我希望用像swing这样的东西来做这件事,而不是像Jfreechart那样使用任何库

谢谢

解决方法:

你可能想看看Lissajous curves; a = 5,b = 4(5：4)的例子如下所示.

public class LissajousPanel extends JPanel {

private static final int SIZE = 400;

private GeneralPath path = new GeneralPath();

@Override

public Dimension getPreferredSize() {

return new Dimension(SIZE, SIZE);

}

@Override

public void paintComponent(Graphics g) {

super.paintComponent(g);

Graphics2D g2d = (Graphics2D) g;

g2d.setRenderingHint(

RenderingHints.KEY_ANTIALIASING,

RenderingHints.VALUE_ANTIALIAS_ON);

double dt = Math.PI / 180;

int w = getWidth() / 2;

int h = getHeight() / 2;

path.reset();

path.moveTo(w, h);

for (double t = 0; t < 2 * Math.PI; t += dt) {

double x = w * Math.sin(5 * t) + w;

double y = h * Math.sin(4 * t) + h;

path.lineTo(x, y);

}

g2d.setColor(Color.blue);

g2d.draw(path);

}

public static void main(String[] args) {

EventQueue.invokeLater(new Runnable() {

@Override

public void run() {

JFrame f = new JFrame();

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

f.add(new LissajousPanel());

f.pack();

f.setVisible(true);

}

});

}

}

标签：java,plot,graph,draw

来源： https://codeday.me/bug/20190918/1810365.html