graphapplet.java

JSP2.0实用教程实例源码

import java.awt.Graphics;
import java.awt.Frame;
import java.awt.Color;
public class GraphApplet extends java.applet.Applet {
    	double f(double x) {
		return (Math.cos(x/5) + Math.sin(x/7) + 2) * getSize().height / 4;
    	}	
    	public void paint(Graphics g) {
        	for (int x = 0 ; x < getSize().width ; x++) {
        		g.setColor (Color.red);
			g.drawLine(x, (int)f(x), x + 1, (int)f(x + 1));
        	}
    	}
    	public String getAppletInfo() {
		return "Draws a sin graph.";
	}

}