My work often requires me to find out whether java or JRE or JVM is available in the user’s browser. Some of the programs use Java Applet technology, and some will silently fail if JRE is not present or not enabled on the user’s computer, leading to lots of user frustration. This had me looking for ways to A) detect for the absence of JRE and warns the user before even attempting to launch the program; and B) have a means of easily finding out the JRE availability and version after the fact.
Java Detection Scripts or Kits:
- Sun’s Java Deployment Toolkit,
- Java Plugin Detector (this builds on the JaveDeploy.js script from Sun),
- jsbrwsniff open source script
- Alternative and more reliable Java Detection Technique
Online Java Detection:
- Java Detection Page from Sun,
- Java Installed Verifier (from Sun) (5/5)
- Java Detection from Skillsoft (this detects more than just Java),
- Java Tester (5/5)
- Java Detection from BrowserSpy
- Click and Learn detection
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