public void drawPieSlanted(Graphics g, int x, int y,
                               int size, int angle, int slope)
    {
      int cos = (int)Math.round((size/2) * Math.cos(slope*Math.PI/180));
      drawPie(g, x, y + (size/2) - cos, size, 2 * cos, angle);
    }
 
Simple Graph
/*
 * @(#)GraphApplet.java	1.3 98/03/18
 *
 * Copyright (c) 1997 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
 * modify and redistribute this software in source and binary code form,
 * provided that i) this copyright notice and license appear on all copies of
 * the software; and ii) Licensee does not utilize the software in a manner
 * which is disparaging to Sun.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
 * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
 * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
 * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
 * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
 * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
 * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
 * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
 * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 *
 * This software is not designed or intended for use in on-line control of
 * aircraft, air traffic, aircraft navigation or aircraft communications; or in
 * the design, construction, operation or maintenance of any nuclear
 * facility. Licensee represents and warrants that it will not use or
 * redistribute the Software for such purposes.
 */

import java.awt.Graphics;

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.drawLine(x, (int)f(x), x + 1, (int)f(x + 1));
        }
    }
  public String getAppletInfo() {
    return "Draws a sin graph.";
  }
}

Graph Class
import java.awt.Graphics;

public class Graph {
    Public int k1, k2, k3;

    Public void Graph(int k1; int k2; int k3) {
    this.k1=k1;    this.k2=k2;	this.k3=k3;
    }

    double f(double x) {
	return (Math.cos(x/k1) + Math.sin(x/k2) + 2) * k3;
    }

    public void printGraph(Graphics g, int x0; int x1) {
        for (int x = x0 ; x < x1 ; x++) {
	    g.drawLine(x, (int)f(x), x + 1, (int)f(x + 1));
        }
    }
}
 Draws a graph
import java.awt.Graphics;

public class DrawGraphApplet extends java.applet.Applet {
    Graph g1;
    public void init() {
	g1 = new Graph(5,5,getSize().height / 4);        
    }
    public void paint(Graphics g) {
        g1.printGraph(g,0,getSize().width);
    }
}

 Moving wave
import java.awt.*;
import java.applet.Applet;
public class WaveApplet extends Applet implements Runnable {

  Thread t = null;

  boolean stopFlag;
  public Graph g1;
    
  public void init() {
    g1 = new Graph(5,5,getSize().height / 4);    
  }

  public void start() {
    t = new Thread(this);
    stopFlag = false;
    t.start();
  }

  public void run() {
    int angle = 1;

    // Display banner 
    for( ; ; ) {
      try {
        repaint();
        Thread.sleep(250);
	g1.k1=Math.round((float)Math.random()*10);
        g1.k2=Math.round((float)Math.random()*10);
        if(stopFlag)
          break;
      } catch(InterruptedException e) {}
    }
  }

  // Pause the wave.
  public void stop() {
    stopFlag = true;
    t = null;
  }

  public void paint ( Graphics g ) {
         g1.printGraph(g,0,getSize().width);
  }
}

 Exercise 10

        

y = m * OP(n*x)