Client-Side Development Section Index | Page 3

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What are the main differences between applets and applications?

Applets are created to be embedded within a browser. As such, they have methods that are automatically called by the browser at certain times: init() when first loaded, start() when page loaded/en...more

How do I select a row (or rows) in a JTable?

In the Model-View-Controller (MVC) world of Swing, the JTable is just a display mechanism. Instead of selecting rows in the table (view), you select rows in the selection model: ListSelectionMode...more

How do I extend permissions to an applet without editing the policy file manually?

A: Short answer: Forget about Java 2 security (i.e. the policy file) when creating applets. No major web browser currently supports that security model. Instead, place the applet in ...more

What is a peer?

AWT uses native code (code specific to a single operating system) to display its components. Each implementation of the Jave Runtime Environment (JRE) must provide native implementations of Button...more

How do I download a (binary, text, executable) file from a servlet or JSP?

Solution 1: Just use HTTP! This has nothing to do with servlets per se. Make sure the file is on your web server. Then you can either embed a link for your user to click, as <a href="run...more

How do I open and redirect to a popup window from a servlet? (Under certain circumstances I want my servlet to bust out of the frames and redirect to another servlet or page.)

You can't do this directly but it is easy to do indirectly using JavaScript. Essentially you return a page that has as its onLoad event code that opens a page and gets your new data. Your servle...more

How do I create an image (GIF, JPEG, etc.) on the fly from a servlet?

To create an image or do image processing from Java, there are several packages and classes available. See the Purple Servlet References for a list. Once you have an image file in your servlet...more

How can I highlight some text in an inactive textfield?

Here is a sample for you. import javax.swing.*; import java.awt.*; import javax.swing.text.*; public class TpHighlight extends JFrame { String tf_str="Hello this is a demo for High Lighting...more

SSN Validation Are there any guides to validating social security numbers?

The first three digits of an SSN map to the location where the number was requested. The Social Security Administration maintains a list of valid digit mappings at http://www.ssa.gov/foia/stateweb...more

Why doesn't the Windows L&F use the same Fonts as Windows?

Why doesn't the Windows L&F use the same Fonts as Windows? Why don't they just use the SAME? I know they do try to follow the Windows settings (even more in 1.4!) But, still, the fonts (the mos...more

Ensuring that previous graphical objects do not get erased with every repaint I'm trying to create a MS-Paint Style whiteboard for collaborative work across the net.

Ensuring that previous graphical objects do not get erased with every repaint I'm trying to create a MS-Paint Style whiteboard for collaborative work across the net. Any previously drawn graphical...more

Browser Page idle for 3 minutes Is it possible to find out if the browser page is idle for some time and prompt to the user?

Hi, This is a very simple html page that after a 1 minute (set with the IDLE_TIME variable) of total inactivity, it will diplay an alert box. The "total" inactivity is defined using the <script...more