Question

用JAVA用Graphics2D来绘制一个坐标系，带刻度的那种

类似这种的

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Answer 1

public class test8888 extends JPanel
{
Polygon po = new Polygon();
Font fn = new Font("宋体", Font.BOLD, 22);
Font fn2 = new Font("宋体", Font.BOLD, 20);
int x = 100;
int y = 100;
int[] pox ={ 90, 100, 100 };
int[] poy ={ 110, 90, 100 };
int[] poxx ={ 100, 100, 110 };
int[] poyy ={ 90, 90, 110 };

int[] poxB = {687,697,707};
int[] poyB = {690,700,700};
int[] poxBB = {687,697,707};
int[] poyBB = {710,700,700};

public test8888()
{
setSize(900, 900);

}

public void paint(Graphics g)
{
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g;
g2d.setColor(Color.black);
g2d.fillRect(99, 100, 2, 600);
g2d.fillRect(99, 700, 600, 2);
g2d.fillRect(100, 685, 15, 15);
for (int i = 0; i < 37; i++)
{
g2d.drawLine(100 + i * 15, 600 + y, y + i * 15, y + 45);
g2d.drawLine(100, 600 + y - i * 15, y + 555, y + 600 - i * 15);
g2d.drawString("0", x - 20, 720);
if (i % 2 == 0 && i / 2 != 0)
{
g2d.drawString(String.valueOf(i / 2), x - 20, 705 - i / 2 * 30);
g2d.drawString(String.valueOf(i / 2), x - 5 + i / 2 * 30, 720);
}
}
g2d.setFont(fn2);
g2d.setColor(Color.white);
g2d.drawString("A", 102, 700);
g2d.setFont(fn);
g2d.setColor(Color.black);
g2d.drawString("Y", 80, 140);
g2d.drawString("X", 670, 720);

g2d.fillPolygon(pox,poy,3);
g2d.fillPolygon(poxx,poyy,3);

g2d.fillPolygon(poxB,poyB,3);
g2d.fillPolygon(poxBB,poyBB,3);
g2d.dispose();

}

public static void main(String[] args)
{
JFrame jf = new JFrame();
jf.setSize(900, 900);
jf.setVisible(true);
jf.setDefaultCloseOperation(3);
jf.getContentPane().add(new test8888());
}
}

Answer 2

其实，在paint事件中，使用Graphics的 drawLine 方法 并不难

追问

Java没有专门画这种的东西吗？硬画我也画的出来，就是觉的底下的刻度什么的好麻烦