Java Plugin vs Web Start

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Java Plugin vs Web Start

Post by support »

Oracle has announced the end of Java Plugin for Java 9 planned by the end of 2016. ... lugin_free

It means that applets won't be supported in any browser for Java 9 (and higher) because applets rely on Java Plugin. However, it will continue to be supported for Java 8 only until EOL (in 2017 or 2018).

Does it mean Java is dead? No, only Java Plugin will die but we still have Java Web Start as alternative to run/deploy Java applications automatically from any browser.

JFileUpload supports Java Web Start deployment since a few years. A working sample is already available in documentation/samples/webstart folder. We're going to add more samples in our online demos.

But what should we know for a Java Plugin (Applet) vs WebStart deployment:
- Both require Java installed on client-side (desktop/laptop)
- Both run in secured sandbox (need signed code to access local resources)
- Applet is displayed inside browser, WebStart not (in external window)
- WebStart application is launched from browser with a link (.jnlp) in HTML page
- WebStart does not require any JavaScript or Applet tag in browser
- Parameters for WebStart application are setup within the .jlnp file
- File(s) Drag&Drop, copy/paste works with WebStart application
- Redirect with URL in browser after upload basically works
- JSAPI cannot work as WebStart runs outside browser
WebStart launch example
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Posts: 1503
Joined: Sun Jan 27, 2008 6:19 pm

Re: Java Plugin vs Web Start

Post by support »

Here is a sample of JNLP file. Notice the parameter width/height to setup WebStart window size. Modified resources are under a If you pass variables in post parameter, they must be URL encoded.

Code: Select all

<?xml version="1.0" encoding="utf-8"?>
<jnlp spec="1.0+" codebase="http://localhost:8080/upload/" href="webstart_http.jnlp">
    <homepage href=""/>
    <description>Java File Uploader</description>    
    <j2se version="1.4 1.5 1.6 1.7 1.8 1.9"/>
    <jar href="lib/jfileupload.jar" main="true" download="eager"/>
    <jar href="lib/chttpclient.jar"/>
    <jar href="lib/httpimpl.jar"/>
    <jar href="lib/clogging.jar"/>

  <application-desc main-class="jfileupload.upload.client.MApplication">  

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