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Can the installer autodetect if there is an existing Java(tm) installation in the system?

April 26, 2017autodetect existing installation installer Java system TM

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Can the installer autodetect if there is an existing Java(tm) installation in the system?

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Yes, you can make the installer autodetect whether or not there is an existing Java(tm) installation in the system by using an action. If a suitable Java(tm) is found, the action will also create a number of variables, described later on. This action is usually placed at the and if no valid JRE or JDK is found, the installer will abort with an error listing the supported JREs and JDKs. The following example will select any Sun Microsystems JRE 1.3 or newer (for example, 1.3, 1.4, 1.5) or any IBM JRE with version number equal or greater than 1.4.2 but inside the 1.4 series (1.5 will not work at this time).