Have just finished programming my first Java Applet. How can I share this with my friends without them using eclipse on my computer?
I have 12 classes in eclipse. I have seen some examples of people using HTML to embed their applet in a website, but
A) I have only found examples with only one class.
B) I tried following this method: http://www.oxfordmathcenter.com/drupal7/node/37
but when I click on the html file, it just opens the html code in my browser, not the applet.
This is the HTML file that I made
<html>
<head>
<title>
World Cup Game
</title>
</head>
<body>
<h2>World Cup Game</h2>
<applet
codebase=“https://www.dropbox.com/s/lcojvh8tm2mukzn”
archive = “WorldCup.jar”
width = 800 height = 600>
</applet>
</body>
</html>
I don't mind whether I share it embedded on a web page or if I send them an executable jar file or whatever, but does anyone know how I can share my hard work!? Thanks :)
(Apparently executable jar file isn't an option with applets though...)
Of course it is an option:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<html>
<head>
<title>My Applet Page</html>
</head>
<body>
<applet code="ClassFile.class" archive="YourJar.jar" width="400px" height="400px">
Java is not installed on your machine or your browser does not allowed Java Applet to run<br /><br />Get the latest Java technology at http://www.java.com/
</applet>
</body>
</html>
But I would not use that. Servlets are much better idea. Applets are client side thing if you do something that do not have to be processed on back-end why not but I did not see any applets for couple of years...
If you dont see your applet then probably you have public static void main(String[] args) instead of public void init() that also could make you problems
The basic Problem about applets are that they need jvm oriented browsers to run.
due to this reason applets(java) failed. today servlets are considered. you would need eclipse or any jvm for your browser to run..
Related
I've written a Java Applet (in Eclipse, if that makes any difference) and embedded it in a local HTML file (which I will include). The applet code shouldn't be necessary because the problem lies in my HTML. The local HTML file works fine on Chrome, but Chrome is ending support for Java soon, so I'm trying to use the file on Safari. Theoretically, it should all function the same, but the Safari throws a ClassNotFoundException, while Chrome still runs it smoothly. The error reads "ClassNotFoundException", and the detail reads "chaos.chaos.class" (see HTML). (If it's relevant, I'm on OS X 10.10.3, with fully updated everything (I believe)) And, apparently, I'm not allowed to post pictures, so I shall verbally describe the layout of my folders. The HTML file is in the same directory as another directory called 'chaos'. Inside this directory are the 'chaos.jar' and 'chaos.class' referenced in my code, along with 'Shape.class' which is not referenced but is necessary for the applet to run (it's referenced by one to the other files). Thank you in advance for any and all help and suggestions.
UPDATE: I have also tried the HTML file on Firefox, and it works seamlessly there too. But I don't really like Firefox all that much, so I'm still searching for the answer.
<html>
<head>
<title>
The Chaos Game
</title>
</head>
<body align="center">
<blockquote>
<applet code="chaos.chaos.class"
archive="chaos.chaos.jar"
width=900 height=900
title="Chaos">
</applet>
</blockquote>
<br/>
<font size = "3">
Written by ...
</font>
</body>
</html>
I am doing a project in c++ where I need to embed a java applet/java program.( like we usually see on webpages). I was wondering what is the easiest way to do this. Right now, I am using Qt designer. Thanks.
If you use QWebPage in your application you can load a url that has the JApplet embedded.
Edit:
You may not have JRE installed on the target machine if it's not loading the applet. If you do something like below it should spit out a message if something goes wrong with Java. This is just an untested example to give you the basic idea of what I meant.
An example webpage:
<html>
<head>
<title>Java Applet</title>
</head>
<body>
<applet code="YourApplet.class" width=400 height=400>Java not supported or not installed</applet>
</body>
</html>
Save this as MyPageName.html
A simplistic example of using this in Qt:
// the QWebView has a QWebFrame and QWebPage to make it easy
QWebView* webView = new QWebView(parentWidget); // MainWindow or whatever as parent
webView->load(QUrl("MyPageName.html")); // local page or valid URL
webView->show();
Hope that helps a bit more
In version 4.8 of Qt, java applets are not supported.
I am trying to embed a swing applet into our website, but it is not working. I have been able to get applets that use awt to do graphics to work. The web page that contains the applet only shows a blank box that should contain my applet, there aren't even any error messages. My applet works fine in netbeans. The applet is supposed to show a few buttons and a text field. I really don't know whats going on.
The web page is located at http://nuevawave.org/sandbox/JavaGallery/GUIApplet.html
The applet is at http://nuevawave.org/sandbox/JavaGallery/TestApplet.jar
Here is the html:
<html>
<head>
<title>Test Page</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<applet Archive ="TestApplet.jar, swing-layout-1.0.4.jar"
Code="test.GUIApplet"
WIDTH="250" HEIGHT="300" >
</applet>
</body>
</html>
as I wrote in the comments it works for me (I'm using OpenJDK 1.6.0_22, Linux (ubuntu) and Firefox).
If java works from your "command line" or terminal. I could be that the plugin for your browser isn't installed. I would recommend you reinstalling the JDK or JRE and remember to install the plugin for the browser aswell.
You can use the <object> tag instead. To know how to use this, check this link
This is my JSP file.
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<%
//JFileChooser filechoose = new JFileChooser();
JFileChooser filechoose = new JFileChooser("D:\\");
filechoose.showOpenDialog(null);
File file = filechoose.getSelectedFile();
XLCauHoi.ImportXmlFileToData(file);
%>
<h4> Đã xuất file thành công </h4>
</body>
</html>
My problem is that: the JFileChooser pops up 2 times when I run it on browser. If I run it in a Java class, JFileChooser pops up 1 time.
What is my problem and how to solve it?
There's a major misconception here. First thing, JSP/Java runs at the webserver, produces a bunch of HTML/CSS/JS and sends it to webbrowser. Webbrowser retireves HTML/CSS/JS and interprets/applies/executes it. It doesn't run any line of Java code because it has already been executed on the webserver. Rightclick page in webbrowser and choose View Source. Do you see it? If webserver has done its job right, you should not see any line of Java code in there. The webbrowser namely doesn't understand it. It only understands HTML/CSS/JS.
Using a JFileChooser in a JSP scriptlet would technically only "work" when both the webserver and webbrowser runs at physically the same machine. It's basically the webserver which displays the dialog, not the webbrowser. This would only "work" when you're locally developing, but never when you publish the website into world wide web by a standalone webserver.
To upload files by HTML, you need an <input type="file"> element, not a JFileChooser. For more detail how to use it with JSP/Servlet, check this answer.
As to the concrete problem, I have no idea why it pops 2 times, but that should be your least concern in this particular case.
Is there somehow that I can invoke Java running on a server from a web browser? I would like:
User navigates to URL in a browser
User fills in input boxes (text)
User presses submit button
Input fields are sent as parameters to java that is executing on the server
A new html page is displayed that was generated by the java running on the server.
What is the standard way to do this, or something similar to this.
I think with PHP this would be relatively simple. I think that you would just pass arguments after the URL like this: www.mysite.com/folder?arguments.
Yes, this is possible (and is extremely common). Two of the most common ways are Java Servlets (where responses are generated purely via Java code) and Java Server Pages (where server logic is intermingled within HTML, similar to ASP or PHP).
There are countless ways to serve HTML from Java but virtually all of them rely on java servlets and java server pages (JSPs) which are Java's specification for handling web requests.
The absolute bare minimum to get going:
Install Java EE SDK ensuring to also install Netbeans and Glassfish.
Launch Netbeans and create a "Java Web" / "Web Application" project
Enter a project name, e.g. MyWebApp
In the Server and Settings screen, you need to Add... your server so do so. Point to the file location of your Glassfish server and enter the admin name and password
Ignore the framework stuff and Finish
NetBeans will generate a sample app and you can click straightaway on Run Main Project. It will deploy your app to Glassfish and load http://localhost:8080/MyWebApp/ from your default browser
Important things to note:
A file called web.xml tells the host server some basics about your web app. This file can contain a lot of other stuff but the default is some boiler plate. The most interesting part says <welcome-file>index.jsp</welcome-file> which means when you load http://localhost:8080/MyWebApp/ it will default to load index.jsp.
The index.jsp is what gets loaded if you don't specify a page to the server. If you look at index.jsp it's just HTML with some JSP markup.
<%#page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<h1>Hello World!</h1>
</body>
</html>
Creating new JSPs is as simple as writing HTML. Netbeans has a wizard to create a simple JSP.
You can embed chunks of Java into a .jsp easily and step in and out of Java / HTML with the <% %> notation such as
<%
for (int i = 0; i < 10; i++) {
%>
Hello <%=i%>
<% } %>
Glassfish is just one possible app server. As long as you write compliant code it should functional with only minimal or zero modifications on any other implementation of Java Servlet / JSP spec. e.g. Jetty, Tomcat, oc4j, JBoss, WebSphere etc.
This is just the tip of the iceberg. You can make things as simple or complex as you like.
Once you know the basics then it's up to you how deep you go. More advanced topics would be:
Taglibraries - these can remove a lot of java clutter and are considered more correct
Expressions - using expressions inside JSP pages to reduce the need for messy <%= notation
Custom servlets let you move model / business stuff into a Java class and leave the .jsp to just presentational
MVC web frameworks like Struts, Spring etc.
Security & filtering
It's a massive subject but it's fairly easy to do something quick and dirty.
As a followup to Mark Peters answer, you need a java web server like Tomcat or GlassFish in order to use servlets or jsps. There are a lot of great frameworks for Java that help you abstract away from the original servlet classes, but I'll let you look those up and decided if you even need them for something this simple.
If you want to pass arguments in a URL, then easier approach is Axis
You can display result with javascript on your page.
If you want to pass arguments in a URL, then easier approach is Axis
My school has an apache server that we are required to use. I was not allowed to install tomcat. I ended up invoking my server side Java using PHP. Not the most beautiful solution but it works.