Can be implemented with Java 2D?

Could anyone tell me what kind of effect in this flash animation? it can be implemented with Java 2D?
http://www.echt-wahnsinn.de/liebesgesichtflash.htm

Thanks for your answer.
so it's not only just for fun but the part of our semester project. :-)
Could you explian it more in detail, I mean "manipulate the color/brightness values"
please tell me if the step is right:
1. load a new image as background pic and another new pic as the small image (using BufferedImage)
because I will scale(maybe scale = 0.5) the both pics in my UI window.
. img_org . img_min . img_result .
2. create the background pic in third ImagePanel automatically and finish the image manipulations.
at the same time to get the size of img_org, img_min, and color/brightness values, pixels.
here I am not sure how to implement it effectively. image clipping?
any suggestion and help are welcome!!
laue

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SGD4.6 can't work with Java update7.51

SGD4.6 can't work with Java latest version update 7.51. The webtop keeps showing "loading", is there any patch for this issue?
When Java released update 7.21, it also can't work with SGD4.6, then Oracle fixed it by updating a patch, so how about this problem?

Have a look at this Thread:
https://community.oracle.com/thread/2614978

How advantages of "Call By Reference" can be implemented using Java

As I know that java doesnot support "Call By Reference" as C++
does.
I want to know that how advantages of Call by Reference can be
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There is some misunderstanding here. Method arguments in Java are passed by value. However, if you pass a reference (to an object) by value, you can still modify the object that the (copy of the) reference points to.
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How i can start working with Java?

Right now i am having only 8 months of exp in ABAP. can any one help me out to start working with Java specially for Netweaver Purpose

It is great if you can get yourself familiar with java syntax, as is the case with any new langauage. However, the worst thing you can do is just code java in a top down approach. If you are not familiarizing yourself with OO concepts and best practices, then you are going to miss two important benefits that you will get from using OO programming - Reusability and flexibility in the frameworks that you develop (leveraging design patterns).
These benefits will also be directly obtainable when you use ABAP objects.
I am working in the opposite direction at the moment. I have some java experience, and I am starting to learn ABAP. I have used ABAP objects in my first project, and it was actually much better than I thought it would to be.
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My boss is about to send me to class for Java (Server Side) Programming. I am a novice programmer who knows only COBOL and C.
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Here is a couple of links for ya
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http://www.javazoom.net/jzservlets/servlets.html
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See what can be done with Java

Want to see what can be done with a Java and specifically a Java3D application. Go to the Java3D forum and download the application "Free Java3D Demo Application".
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I appreciate the response to this posting however please do not email questions to me reguarding how it works or can I help you to do your java homework. <8-)
I received 60 email since this posting with many questions. The software is a commercial application. If you are interested, I suggest you go to www.3demall.com/fast and join the program in order to receive a CD and support. The Fast Start Program is a way to introduce our complete concept of PayWare while providing a good value.

Can I FAX with JAVA MAIL??

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Thanking you
Achintya

Hello! Achintya, what I know is you need to hv a service provider to convert yr e-mail into fax format & send to the destination.
iSam
[email protected]

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Hi all, I need to implement JavaMail using Servlet and deploy throught J2EE deployment tool. But when i test out the servlet i will always encounter this exception thrown. How can i solve this?
java.security.AccessControlException: access denied (java.util.PropertyPermission * read,write)
This is the servlet i am testing. Please advise. Thanks in advance!
* @(#)JavaMailServlet.java 1.3 99/12/06
* Copyright 1998, 1999 Sun Microsystems, Inc. All Rights Reserved.
* This software is the proprietary information of Sun Microsystems, Inc.
* Use is subject to license terms.
import java.io.*;
import java.util.*;
import java.text.*;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;
* This is a servlet that demonstrates the use of JavaMail APIs
* in a 3-tier application. It allows the user to login to an
* IMAP store, list all the messages in the INBOX folder, view
* selected messages, compose and send a message, and logout.
* 
* Please note: This is NOT an example of how to write servlets!
* This is simply to show that JavaMail can be used in a servlet.
* 
* For more information on this servlet, see the
* JavaMailServlet.README.txt file.
* 
* For more information on servlets, see
* * http://java.sun.com/products/java-server/servlets/index.html
* @author Max Spivak
public class JavaMailServlet extends HttpServlet implements SingleThreadModel {
String protocol = "POP3";
String mbox = "INBOX";
* This method handles the "POST" submission from two forms: the
* login form and the message compose form. The login form has the
* following parameters: <code>hostname</code>, <code>username</code>,
* and <code>password</code>. The <code>send</code> parameter denotes
* that the method is processing the compose form submission.
public void doPost(HttpServletRequest req, HttpServletResponse res)
 throws ServletException, IOException {
// get the session
 HttpSession ssn = req.getSession(true);
 String send = req.getParameter("send");
String host = req.getParameter("hostname");
String user = req.getParameter("username");
String passwd = req.getParameter("password");
URLName url = new URLName(protocol, host, -1, mbox, user, passwd);
ServletOutputStream out = res.getOutputStream();
 res.setContentType("text/html");
 out.println("<html><body bgcolor=\"#CCCCFF\">");
 if (send != null) {
 // process message sending
 send(req, res, out, ssn);
 } else {
 // initial login
 // create
 MailUserData mud = new MailUserData(url);
 ssn.putValue("javamailservlet", mud);
 try {
 Properties props = System.getProperties();
 System.out.println("url");
 props.put("mail.smtp.host", host);
 Session session = Session.getDefaultInstance(props, null);
 session.setDebug(false);
 Store store = session.getStore(url);
 store.connect();
 Folder folder = store.getDefaultFolder();
 if (folder == null)
 throw new MessagingException("No default folder");
 folder = folder.getFolder(mbox);
 if (folder == null)
 throw new MessagingException("Invalid folder");
 folder.open(Folder.READ_WRITE);
 int totalMessages = folder.getMessageCount();
 Message[] msgs = folder.getMessages();
 FetchProfile fp = new FetchProfile();
 fp.add(FetchProfile.Item.ENVELOPE);
 folder.fetch(msgs, fp);
 // track who logged in
 System.out.println("Login from: " + store.getURLName());
 // save stuff into MUD
 mud.setSession(session);
 mud.setStore(store);
 mud.setFolder(folder);
 // splash
 out.print("<center>");
 out.print("");
 out.println("Welcome to JavaMail!</center>");
 // folder table
 out.println("<table width=\"50%\" border=0 align=center>");
 // folder name column header
 out.print("<tr><td width=\"75%\" bgcolor=\"#ffffcc\">");
 out.print("");
 out.println("FolderName</td> ");
 // msg count column header
 out.print("<td width=\"25%\" bgcolor=\"#ffffcc\">");
 out.print("");
 out.println("Messages</td> ");
 out.println("</tr>");
 // folder name
 out.print("<tr><td width=\"75%\" bgcolor=\"#ffffff\">");
 out.print("<a href=\"" + HttpUtils.getRequestURL(req) + "\">" +
 "Inbox" + "</a></td> ");
 // msg count
 out.println("<td width=\"25%\" bgcolor=\"#ffffff\">" +
 totalMessages + "</td>");
 out.println("</tr>");
 out.println("</table");
 } catch (Exception ex) {
 out.println(ex.toString());
 } finally {
 out.println("</body></html>");
 out.close();
* This method handles the GET requests for the client.
public void doGet (HttpServletRequest req, HttpServletResponse res)
 throws ServletException, IOException {
HttpSession ses = req.getSession(false); // before we write to out
ServletOutputStream out = res.getOutputStream();
 MailUserData mud = getMUD(ses);
 if (mud == null) {
 res.setContentType("text/html");
 out.println("<html><body>Please Login (no session)</body></html>");
 out.close();
 return;
 if (!mud.getStore().isConnected()) {
 res.setContentType("text/html");
 out.println("<html><body>Not Connected To Store</body></html>");
 out.close();
 return;
 // mux that takes a GET request, based on parameters figures
 // out what it should do, and routes it to the
 // appropriate method
 // get url parameters
 String msgStr = req.getParameter("message");
String logout = req.getParameter("logout");
 String compose = req.getParameter("compose");
 String part = req.getParameter("part");
 int msgNum = -1;
 int partNum = -1;
 // process url params
 if (msgStr != null) {
 // operate on message "msgStr"
 msgNum = Integer.parseInt(msgStr);
 if (part == null) {
 // display message "msgStr"
res.setContentType("text/html");
 displayMessage(mud, req, out, msgNum);
 } else if (part != null) {
 // display part "part" in message "msgStr"
 partNum = Integer.parseInt(part);
displayPart(mud, msgNum, partNum, out, res);
 } else if (compose != null) {
 // display compose form
 compose(mud, res, out);
} else if (logout != null) {
 // process logout
try {
mud.getFolder().close(false);
mud.getStore().close();
 ses.invalidate();
out.println("<html><body>Logged out OK</body></html>");
} catch (MessagingException mex) {
out.println(mex.toString());
 } else {
 // display headers
 displayHeaders(mud, req, out);
/* main method to display messages */
private void displayMessage(MailUserData mud, HttpServletRequest req,
 ServletOutputStream out, int msgNum)
 throws IOException {
 out.println("<html>");
out.println("<HEAD><TITLE>JavaMail Servlet</TITLE></HEAD>");
 out.println("<BODY bgcolor=\"#ccccff\">");
 out.print("<center>");
 out.println("Message " + (msgNum+1) + " in folder " +
 mud.getStore().getURLName() +
 "/INBOX</center>");
 try {
 Message msg = mud.getFolder().getMessage(msgNum);
 // first, display this message's headers
 displayMessageHeaders(mud, msg, out);
 // and now, handle the content
 Object o = msg.getContent();
 //if (o instanceof String) {
 if (msg.isMimeType("text/plain")) {
 out.println("<pre>");
 out.println((String)o);
 out.println("</pre>");
 //} else if (o instanceof Multipart){
 } else if (msg.isMimeType("multipart/*")) {
 Multipart mp = (Multipart)o;
 int cnt = mp.getCount();
 for (int i = 0; i < cnt; i++) {
 displayPart(mud, msgNum, mp.getBodyPart(i), i, req, out);
 } else {
 out.println(msg.getContentType());
 } catch (MessagingException mex) {
 out.println(mex.toString());
 out.println("</BODY></html>");
 out.close();
* This method displays a message part. <code>text/plain</code>
* content parts are displayed inline. For all other parts,
* a URL is generated and displayed; clicking on the URL
* brings up the part in a separate page.
private void displayPart(MailUserData mud, int msgNum, Part part,
 int partNum, HttpServletRequest req,
 ServletOutputStream out)
 throws IOException {
 if (partNum != 0)
 out.println("<hr>");
try {
 String sct = part.getContentType();
 if (sct == null) {
 out.println("invalid part");
 return;
 ContentType ct = new ContentType(sct);
 if (partNum != 0)
 out.println("Attachment Type: " +
 ct.getBaseType() + " ");
 if (ct.match("text/plain")) {
 // display text/plain inline
 out.println("<pre>");
 out.println((String)part.getContent());
 out.println("</pre>");
 } else {
 // generate a url for this part
 String s;
 if ((s = part.getFileName()) != null)
 out.println("Filename: " + s + " ");
 s = null;
 if ((s = part.getDescription()) != null)
 out.println("Description: " + s + " ");
 out.println("<a href=\"" +
 HttpUtils.getRequestURL(req) +
 "?message=" +
 msgNum + "&part=" +
 partNum + "\">Display Attachment</a>");
 } catch (MessagingException mex) {
 out.println(mex.toString());
* This method gets the stream from for a given msg part and
* pushes it out to the browser with the correct content type.
* Used to display attachments and relies on the browser's
* content handling capabilities.
private void displayPart(MailUserData mud, int msgNum,
 int partNum, ServletOutputStream out,
 HttpServletResponse res)
 throws IOException {
 Part part = null;
try {
 Message msg = mud.getFolder().getMessage(msgNum);
 Multipart mp = (Multipart)msg.getContent();
 part = mp.getBodyPart(partNum);
 String sct = part.getContentType();
 if (sct == null) {
 out.println("invalid part");
 return;
 ContentType ct = new ContentType(sct);
 res.setContentType(ct.getBaseType());
 InputStream is = part.getInputStream();
 int i;
 while ((i = is.read()) != -1)
 out.write(i);
 out.flush();
 out.close();
 } catch (MessagingException mex) {
 out.println(mex.toString());
* This is a utility message that pretty-prints the message
* headers for message that is being displayed.
private void displayMessageHeaders(MailUserData mud, Message msg,
 ServletOutputStream out)
 throws IOException {
 try {
 out.println("Date: " + msg.getSentDate() + " ");
Address[] fr = msg.getFrom();
if (fr != null) {
boolean tf = true;
out.print("From: ");
for (int i = 0; i < fr.length; i++) {
out.print(((tf) ? " " : ", ") + getDisplayAddress(fr));
tf = false;
out.println(" ");
Address[] to = msg.getRecipients(Message.RecipientType.TO);
if (to != null) {
boolean tf = true;
out.print("To: ");
for (int i = 0; i < to.length; i++) {
out.print(((tf) ? " " : ", ") + getDisplayAddress(to[i]));
tf = false;
out.println(" ");
Address[] cc = msg.getRecipients(Message.RecipientType.CC);
if (cc != null) {
boolean cf = true;
out.print("CC: ");
for (int i = 0; i < cc.length; i++) {
out.print(((cf) ? " " : ", ") + getDisplayAddress(cc[i]));
 cf = false;
out.println(" ");
 out.print("Subject: " +
 ((msg.getSubject() !=null) ? msg.getSubject() : "") +
 " ");
} catch (MessagingException mex) {
 out.println(msg.toString());
* This method displays the URL's for the available commands and the
* INBOX headerlist
private void displayHeaders(MailUserData mud,
 HttpServletRequest req,
ServletOutputStream out)
 throws IOException {
SimpleDateFormat df = new SimpleDateFormat("EE M/d/yy");
out.println("<html>");
out.println("<HEAD><TITLE>JavaMail Servlet</TITLE></HEAD>");
 out.println("<BODY bgcolor=\"#ccccff\"><hr>");
 out.print("<center>");
 out.println("Folder " + mud.getStore().getURLName() +
 "/INBOX</center>");
 // URL's for the commands that are available
 out.println("");
out.println("<a href=\"" +
 HttpUtils.getRequestURL(req) +
 "?logout=true\">Logout</a>");
out.println("<a href=\"" +
 HttpUtils.getRequestURL(req) +
 "?compose=true\" target=\"compose\">Compose</a>");
 out.println("");
 out.println("<hr>");
 // List headers in a table
out.print("<table cellpadding=1 cellspacing=1 "); // table
 out.println("width=\"100%\" border=1>"); // settings
 // sender column header
 out.println("<tr><td width=\"25%\" bgcolor=\"ffffcc\">");
 out.println("");
 out.println("Sender</td>");
 // date column header
 out.println("<td width=\"15%\" bgcolor=\"ffffcc\">");
 out.println("");
 out.println("Date</td>");
 // subject column header
 out.println("<td bgcolor=\"ffffcc\">");
 out.println("");
 out.println("Subject</td></tr>");
 try {
 Folder f = mud.getFolder();
 int msgCount = f.getMessageCount();
 Message m = null;
 // for each message, show its headers
 for (int i = 1; i <= msgCount; i++) {
m = f.getMessage(i);
 // if message has the DELETED flag set, don't display it
 if (m.isSet(Flags.Flag.DELETED))
 continue;
 // from
out.println("<tr valigh=middle>");
out.print("<td width=\"25%\" bgcolor=\"ffffff\">");
 out.println("" +
 ((m.getFrom() != null) ?
 m.getFrom()[0].toString() :
 "" ) +
 "</td>");
 // date
out.print("<td nowrap width=\"15%\" bgcolor=\"ffffff\">");
 out.println("" +
df.format((m.getSentDate()!=null) ?
 m.getSentDate() : m.getReceivedDate()) +
 "</td>");
 // subject & link
out.print("<td bgcolor=\"ffffff\">");
 out.println("" +
 "<a href=\"" +
 HttpUtils.getRequestURL(req) +
"?message=" +
i + "\">" +
((m.getSubject() != null) ?
 m.getSubject() :
 "No Subject") +
"</a>" +
"</td>");
out.println("</tr>");
 } catch (MessagingException mex) {
 out.println("<tr><td>" + mex.toString() + "</td></tr>");
 mex.printStackTrace();
 out.println("</table>");
 out.println("</BODY></html>");
 out.flush();
 out.close();
* This method handles the request when the user hits the
* Compose link. It send the compose form to the browser.
private void compose(MailUserData mud, HttpServletResponse res,
 ServletOutputStream out)
 throws IOException {
 res.setContentType("text/html");
 out.println(composeForm);
 out.close();
* This method processes the send request from the compose form
private void send(HttpServletRequest req, HttpServletResponse res,
 ServletOutputStream out, HttpSession ssn)
 throws IOException {
String to = req.getParameter("to");
 String cc = req.getParameter("cc");
 String subj = req.getParameter("subject");
 String text = req.getParameter("text");
 try {
 MailUserData mud = getMUD(ssn);
 if (mud == null)
 throw new Exception("trying to send, but not logged in");
 Message msg = new MimeMessage(mud.getSession());
 InternetAddress[] toAddrs = null, ccAddrs = null;
 if (to != null) {
 toAddrs = InternetAddress.parse(to, false);
 msg.setRecipients(Message.RecipientType.TO, toAddrs);
 } else
 throw new MessagingException("No \"To\" address specified");
 if (cc != null) {
 ccAddrs = InternetAddress.parse(cc, false);
 msg.setRecipients(Message.RecipientType.CC, ccAddrs);
 if (subj != null)
 msg.setSubject(subj);
 URLName u = mud.getURLName();
 msg.setFrom(new InternetAddress(u.getUsername() + "@" +
 u.getHost()));
 if (text != null)
 msg.setText(text);
 Transport.send(msg);
 out.println("<h1>Message sent successfully</h1></body></html>");
 out.close();
 } catch (Exception mex) {
 out.println("<h1>Error sending message.</h1>");
 out.println(mex.toString());
 out.println(" </body></html>");
// utility method; returns a string suitable for msg header display
private String getDisplayAddress(Address a) {
String pers = null;
String addr = null;
if (a instanceof InternetAddress &&
((pers = ((InternetAddress)a).getPersonal()) != null)) {
 addr = pers + " "+"<"+((InternetAddress)a).getAddress()+">";
} else
addr = a.toString();
return addr;
// utility method; retrieve the MailUserData
// from the HttpSession and return it
private MailUserData getMUD(HttpSession ses) throws IOException {
 MailUserData mud = null;
 if (ses == null) {
 return null;
 } else {
 if ((mud = (MailUserData)ses.getValue("javamailservlet")) == null){
 return null;
 return mud;
public String getServletInfo() {
return "A mail reader servlet";
* This is the HTML code for the compose form. Another option would
* have been to use a separate html page.
private static String composeForm = "<HTML><HEAD><TITLE>JavaMail Compose</TITLE></HEAD><BODY BGCOLOR=\"#CCCCFF\"><FORM ACTION=\"/servlet/JavaMailServlet\" METHOD=\"POST\"><input type=\"hidden\" name=\"send\" value=\"send\">JavaMail Compose Message<TABLE BORDER=\"0\" WIDTH=\"100%\"><TR><TD WIDTH=\"16%\" HEIGHT=\"22\"> To:</TD><TD WIDTH=\"84%\" HEIGHT=\"22\"><INPUT TYPE=\"TEXT\" NAME=\"to\" SIZE=\"30\"> (separate addresses with commas)</TD></TR><TR><TD WIDTH=\"16%\">CC:</TD><TD WIDTH=\"84%\"><INPUT TYPE=\"TEXT\" NAME=\"cc\" SIZE=\"30\"> (separate addresses with commas)</TD></TR><TR><TD WIDTH=\"16%\">Subject:</TD><TD WIDTH=\"84%\"><INPUT TYPE=\"TEXT\" NAME=\"subject\" SIZE=\"55\"></TD></TR><TR><TD WIDTH=\"16%\"> </TD><TD WIDTH=\"84%\"><TEXTAREA NAME=\"text\" ROWS=\"15\" COLS=\"53\"></TEXTAREA></TD></TR><TR><TD WIDTH=\"16%\" HEIGHT=\"32\"> </TD><TD WIDTH=\"84%\" HEIGHT=\"32\"><INPUT TYPE=\"SUBMIT\" NAME=\"Send\" VALUE=\"Send\"><INPUT TYPE=\"RESET\" NAME=\"Reset\" VALUE=\"Reset\"></TD></TR></TABLE></FORM></BODY></HTML>";
* This class is used to store session data for each user's session. It
* is stored in the HttpSession.
class MailUserData {
URLName url;
Session session;
Store store;
Folder folder;
public MailUserData(URLName urlname) {
 url = urlname;
public URLName getURLName() {
 return url;
public Session getSession() {
 return session;
public void setSession(Session s) {
 session = s;
public Store getStore() {
 return store;
public void setStore(Store s) {
 store = s;
public Folder getFolder() {
 return folder;
public void setFolder(Folder f) {
 folder = f;

You posted a thousand lines of badly-formatted code and didn't have the sense to say which one had the exception.
My guess is that it was this one:Session session = Session.getDefaultInstance(props, null);because that happened to me. I fixed it by calling getInstance instead of getDefaultInstance.
However if that isn't the problem, how about spending a few seconds to post a less useless question?

Hi I have a geometry problem.Can anyone help with java code

Hi I have a non simple polygon . My job is to make it a simple. for that First I need to find the intersecting lines say line AB intersects line CD. If so then I must replace AB & CD with AC & BD or AD or BC which ever keeps the polygon closed . So can anyone help me out with this code
import java.io.*;
import java.awt.*;
import java.awt.geom.*;
import java.awt.image.*;
import javax.swing.*;
public class Simple{
static int POINTWID = 4; // size of points
// the x and y arrays hold the coordinates
// the B array is the order of the points in the polygon
// You want to fill the C array with the simple polygon
static double x[] = new double[200];
static double y[] = new double[200];
static int B[] = new int[200]; // the permutation matrix
static int C[] = new int[200]; // the one that becomes simple
static SimpleFrame myFrame;
static int numPoints = 3;
public static void main(String args[]) {
makePolygons();
// Create the frame to draw on
myFrame = new SimpleFrame();
myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
myFrame.setSize(600, 600);
myFrame.setVisible(true);
public static void makePolygons(){
// Build an array of random points in the unit square
for(int i = 0; i < numPoints; i++){
x[i] = Math.random();
y[i] = Math.random();// Sample program
B[i] = i; // default permutation
// Create the simple polygon
createSimplePolygon();
* This is the only function you need to mess with
public static void createSimplePolygon(){
// Initialize the C[] array with the identity permutation
for(int i = 0; i < numPoints; i++)
C[i] = i;
// Bubble sort the points from left to right
for(int i = 0; i < numPoints; i++)
for(int j = 0; j < numPoints - 1; j++)
if(x[C[j]] > x[C[j+1]]){
int temp = C[j];
C[j] = C[j+1];
C[j+1] = temp;
public static class SimpleFrame extends JFrame{
public static JSlider numPointsSlider;
public SimpleFrame()
super("Create you own Simple Polygon");
Container content = getContentPane();
content.setLayout(new java.awt.BorderLayout());
JTabbedPane tabbedPane = new JTabbedPane();
tabbedPane.setPreferredSize (new java.awt.Dimension(300, 400));
tabbedPane.addTab("Scrambled", new ScrambledPanel());
tabbedPane.addTab("Simple", new SimplePanel());
content.add(tabbedPane, java.awt.BorderLayout.CENTER);
// Slider for the number of points
numPointsSlider = new JSlider (javax.swing.SwingConstants.HORIZONTAL,
3, 100, 11);
numPointsSlider.addChangeListener (new javax.swing.event.ChangeListener () {
public void stateChanged (javax.swing.event.ChangeEvent evt) {
numPointsSliderStateChanged (evt);
content.add(numPointsSlider, java.awt.BorderLayout.SOUTH);
private void numPointsSliderStateChanged (javax.swing.event.ChangeEvent evt) {
numPoints = numPointsSlider.getValue();
makePolygons();
repaint();
public static class ScrambledPanel extends JPanel{
public void paintComponent(Graphics g){
super.paintComponent(g);
Graphics2D g2 = (Graphics2D) g;
// First set the scaling to fit the window
Dimension size = getSize();
int Xwid = (int) (0.95 * size.width);
int Ywid = (int) (0.95 * size.height);
// First draw the segments
g2.setColor(Color.red);
for(int i = 0; i < numPoints; i++)
g2.drawLine((int) (Xwid * x[B[i]]),
(int) (Ywid * y[B[i]]),
(int) (Xwid * x[B[(i+1) % numPoints]]),
(int)(Ywid * y[B[(i+1) % numPoints]]));
// Now draw the points
for(int i = 0; i < numPoints; i++){
g2.fillRect((int) (Xwid * x) - POINTWID,
(int) (Ywid * y[i]) - POINTWID,
2*POINTWID + 1, 2*POINTWID + 1);
public static class SimplePanel extends JPanel{
public void paintComponent(Graphics g){
super.paintComponent(g);
Graphics2D g2 = (Graphics2D) g;
// First set the scaling to fit the window
Dimension size = getSize();
int Xwid = (int) (0.95 * size.width);
int Ywid = (int) (0.95 * size.height);
// First draw the segments
g2.setColor(Color.red);
for(int i = 0; i < numPoints; i++)
g2.drawLine((int) (Xwid * x[C[i]]),
(int) (Ywid * y[C[i]]),
(int) (Xwid * x[C[(i+1) % numPoints]]),
(int)(Ywid * y[C[(i+1) % numPoints]]));
// Now draw the points
for(int i = 0; i < numPoints; i++){
g2.fillRect((int) (Xwid * x[i]) - POINTWID,
(int) (Ywid * y[i]) - POINTWID,
2*POINTWID + 1, 2*POINTWID + 1);

Hi I am sorry I could explain you properly . Ok
My program gives me a polygon(as you can see when u
run this program)But the polygon is a non simple
polygon.So to make this polygon we must remove all
the crossings betweeen edges in the polygon.The
algorithm which i gave will remove all the crossings
and make the polygon simple.You did not give an algorithm!
SO my job is to take the
existing code and implement the algorithm for this
program in the Createsimpelpolygon() function. For
this First the program must find whether two edges
cross if they cross then swap the vertices like
replace AB & CD with AC & BD or AD & BC.Which ever
keeps the polygon closed . Still not entirely clear to me. You cannot just go and replace vertexes from a polygon: that way you'll end up with a different polygon.
So as we go on we find the
many crossings and iterate the algorithm on all the
crossings until we get simple polygon.Like I said: I don't really understand what it is you're after. You did not respond to my suggestions, so I gather it is not what you're after?
What about Polygon Tessellation (Google for it)? Perhaps that's what you want.
Also, why do you not create a (or use java.awt's) Point class and a Polygon class which holds a java.util.Set of Point's? Your current code looks rather messy.

What programs can i make with java?

As the title suggests, I'm looking for some java programs that someone would be paid to make. I go to a technical school for computer programming, high school, we did visual basic and are just starting java, and i still don't understand how i could make money with either of them.

I write java programs which create maps, and manage geographic data, and help manage surveys, and valuations, and all kinds of land management stuff.
I used to write C programs to help manage land leases.
And before that I wrote clipper programs to help manage body-corporates.
There's plenty of work for talented programmers. Don't you worry about that.
The language is basically irrelevant.
Cheers. Keith.

I can't work with java Beans in IWS6

I have been trying to get my iWS6 to run java bean but has not been able to do so. I tried a few beans and I get the same message on the log:
[27/May/2002:18:30:50] info ( 3160): JSP: JSP1x compiler threw exception
org.apache.jasper.JasperException: Unable to compile class for JSP/local/iplanet/https-hdesk-1/config/../ClassCache/_jsps/_otro_jsp.java:60: Class _jsps.UserData not found.
UserData user = null;
^
/local/iplanet/https-hdesk-1/config/../ClassCache/_jsps/_otro_jsp.java:63: Class _jsps.UserData not found.
user= (UserData)
^
/local/iplanet/https-hdesk-1/config/../ClassCache/_jsps/_otro_jsp.java:68: Class _jsps.UserData not found.
user = (UserData) Beans.instantiate(this.getClass().getClassLoader(), "UserData");
^
3 errors
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:284)
at com.iplanet.server.http.servlet.NSServletEntity.load(NSServletEntity.java:252)
at com.iplanet.server.http.servlet.NSServletEntity.update(NSServletEntity.java:173)
at com.iplanet.server.http.servlet.NSServletRunner.Service(NSServletRunner.java:416)
[27/May/2002:18:30:50] warning ( 3160): Internal error: Failed to get GenericServlet. (uri=/otro.jsp,SCRIPT_NAME=/otro.jsp)
I read a similar answer in this Forum but I couldn't find good results.
I'm using Solaris SPARC and JDK 1.3. When I run the Web server I Find these messages:
Java VM classpath: /local/iplanet/plugins/servlets/examples/legacy/beans.10/SDKBeans10.jar:/local/iplanet/docs:/local/iplanet/bin/https/jar/NSServletLayer.jar:/local/iplanet/bin/https/jar/NSJavaUtil.jar:/local/iplanet/bin/https/jar/NSJavaMiscUtil.jar:/local/iplanet/bin/https/jar/servlet.jar:/local/iplanet/bin/https/jar/servlet-2.3-filters-api.jar:/local/iplanet/bin/https/jar/jsp092.jar:/local/iplanet/bin/https/jar/jaxp.jar:/local/iplanet/bin/https/jar/crimson.jar:/local/iplanet/bin/https/jar/xalan.jar:/local/iplanet/bin/https/jar/jspengine.jar:
[27/May/2002:18:29:21] info ( 3160): Loading IWSSessionManager by default.
[27/May/2002:18:29:21] info ( 3160): IWSSessionManager: Maximum number of sessions is 1000
[27/May/2002:18:29:23] info ( 3160): Successfully initialized web application environment (web-apps.xml) for virtual server (https-hdesk-1)
[27/May/2002:18:29:23] warning ( 3160): The server configuration may require more file descriptors than the operating system provides. If you encounter PR_PROC_DESC_TABLE_FULL_ERROR errors, you may wish to increase the operating system hard file descriptor limit from 1024 to 5763 (see your operating system documentation) or decrease one or more of the following settings: MaxFiles in nsfc.conf and ConnQueueSize, RqThrottle, and MaxKeepAliveConnections in magnus.conf.
[27/May/2002:18:30:46] info ( 3160): Internal Info: loading servlet /otro.jsp
I've run many jsp files without problem, but when I use java Beans it doesn't work.
Thank you
P.D. The Classpath already contains the Java Bean file.

Hola Daniel,
Make this simple thing, import the class in your jsp, for example, in your case this should be:
<%@ page import="UserData" %>
The jasper compiler assumes that any unqualified class is part of the package jsps. I think this is to allow class definitions in the jsps. So if you indicate that the class is not packaged in jsps it will be found.
Juan

Are Multiple-If Optional Regions Can Be Implemented with DW 8???

Hi,
I read about them in DW MX Templates by Brad Halstead and Murrray Summers?

I am not 100% sure what you're asking, but yes:
- you can use multiple optional regions in a template.
- you can use multiple if sections responding to the same template property variable
(You might even be able to nest an optional region within another optional when using sub-templates, but I dont think I ever tried that..)
Hope that helps..

I can't debug with java studio creator (jsf) :

when i type F5 occur this message :
Exception while starting debugger:Cannot connect to remote VM
Wath can i do ?
Thank you.

Hi,
Can we consider this a duplicate thread of
http://swforum.sun.com/jive/thread.jspa?threadID=52199&tstart=0
Thanks,
Creator Team.

Voice Recognition security System... Can it be done with Java??

i'm working in graduation project and i'm developing a system that use voice Recognition security System [the user voice as ID] so i'm asking if it can be done with java and if any tutorials about it ??
null

Make the PDF file available as a normal URL on the server.
Redirect the client browser to the URL.
This will work IF Acrobat is installed, AND is installed as a plugin to the browser, but that's a reasonable assumption if you're presenting PDF files in the first place.
I wouldn't personally be inclined to try to do this with an applet (JSPs + Servlets would be the way to go in my opinion), but it may be possible to redirect the page from an applet...?

Can be implemented with Java 2D?

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