一般的正弦曲线

import java.applet.*;
import java.awt.*;
import java.math.*;
public class drawsin extends Applet{
    public void paint(Graphics g){
        for(int x=100;x<300;x++) {
            g.drawLine(x-100, (int)(50*Math.sin(x/31.4))+100, x-100, (int)(50*Math.sin(x/31.4)+100));
            
         }
    }
}