Question

求大神！！用java编程正弦函数图 y=sin(x)

Answer 1

我给你写一段，Applet的，一会儿贴代码，供参考

追问

好的，谢谢

追答

double x1 = 0, y1 = 0, x2 = 0, y2 = 0;
while (x2 < 2 * Math.PI)
{
x2 = x1 + 0.01;
y2 = Math.sin(x2);
g.drawLine((int) (x1 * 100) + 100, (int) (y1 * 100) + 200, (int) (x2 * 100) + 100, (int) (y2 * 100) + 200);
x1 = x2;
y1 = y2;
}
一个周期的，*100是为了放大

追问

这不是java编程的吧

追答

是java Applet的，你要什么的？awt的？
继承JFrame，绘图部分不用改

public class Ticket extends JFrame
{
/**
*
*/
public Ticket()
{
super();
setBounds(0, 0, 800, 600);
}
private static final long serialVersionUID = 2787645621825874902L;

public void init()
{
}

public void paint(Graphics g)
{
double x1 = 0, y1 = 0, x2 = 0, y2 = 0;
while (x2 < 2 * Math.PI)
{
x2 = x1 + 0.01;
y2 = Math.sin(x2);
g.drawLine((int) (x1 * 100) + 100, (int) (y1 * 100) + 200, (int) (x2 * 100) + 100, (int) (y2 * 100) + 200);
x1 = x2;
y1 = y2;
}
}
public static void main(String []args)
{
new Ticket().show();
}
}