| Downloading the JRE | Multiple JREs |
| Testing Your JRE | Links |
| Silent JRE Installs |
For Vista, make sure you are logged in as an administrator before you install. Some suggest it is best also to turn on UAC (that irritating Visa User Account control) during the install. The downloads are labeled as updates, but they are complete in themselves. You don’t need to install a previous version.
| Version | Executables | Notes |
|---|---|---|
| JRE 1.6.0_11
(current) |
Download 16 Mb self-installing executable. Look for the fourth entry, Java Runtime Environment (JRE) 6 Update 11. Then click Download. Then tick the licence agreement and Click Windows off-line Installation, Multi-language. This is most likely the version you want to download. For Vista, make sure you are logged in as an administrator before you install. The install will work more smoothly if you launch the install of the download with “run as administrator” and if you have UAC turned on. | The download includes the Java Plug-in for Applets and Java Web Start. It includes the JVM and the standard class library files, but no source, and no javac.exe. It does not include JavaMail or JAF. It will install in C:\Program Files\java\jre6. If you want to write your own Java programs, install the JDK instead. |
| any older JRE | In the you can find nearly every JRE Sun ever released, using a fill in the blanks description of what you want. | If you get a broken link try composing the URL from this pattern: http://java.sun.com/products/archive/j2se/5.0_13/index.html |
| JRE 1.5.0_17 (old) | ( 15.8 mb ) Look under Java Runtime Environment (JRE) 5.0 Update 16. | It includes the Java Plug-in and Java Web Start. It includes the JVM and the standard class library files, but no source, and no javac.exe. It does not include JavaMail or JAF. No longer supported after 2008-10. |
| JRE 1.4.2_19 (old) | Download ( 15 Mb ) Look in the JRE column, past the Netbeans stuff, lower on the page under 32-bit/64-bit for Windows/Linux/Solaris SPARC 32-bit for Solaris x86. | It includes the Java Plug-in and Java Web Start. It includes the JVM and the standard class library files, but no source, and no javac.exe. It does not include JavaMail or JAF. No longer supported after 2008-10. |
| JRE 1.3.1 (old) | Download | It now includes the Java Plug-in. It includes the JVM and the standard class library files, but no source, and no javac.exe. |
| JRE 1.2 (old) | Download | It includes the JVM and the standard class library files, but no source, and no javac.exe . The java.exe file it contains is renamed to jre.exe . |
You might want to manually set your JAVA_HOME environment variable to the JRE directory e.g. C:\Program Files\java\jre6. Some software finds Java using this variable rather than poking around in the registry.
java.exe -versionYou should see the expected version you just installed, probably 1.6.0. It can be problematic to have more than one version installed at a time.
It should tell you that your browser is using the JVM version you just installed, probably 1.6.0. Look for the line marked java.version. If Wassup does not run, or you have the wrong version, go into Settings ⇒ Control Panel ⇒ Java Plug-In ⇒ Browser and turn off each browser, then click apply, then turn them on again, then hit apply again. Then retest with Wassup. If that still does not work, turn on the Java console, try Wassup again and look for clues.
Then instead of saying java.exe, use the fully qualified name to select which version of the java run time you want e.g. C:\Program Files\java\jre6\bin\java.exe.
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