Question

I am using Inno Setup to make an installer for a project I am working on, and I need it to set the java environment variable, so that when they run cmd they don’t get a java not found error, or something like that.

I have found a few other posts related to Inno Setup and the setting environment variables, but does anyone know something specific to this instance?

Answer 1

Assuming Java is installed in its default location program files/Java, something like this should work in your case:

[Registry]
; set PATH
Root: HKCU; Subkey: "Environment"; ValueType:string; ValueName:"PATH"; ValueData:"{olddata};{pf}\Java\bin"; Flags: preservestringtype
; set JAVA_HOME
Root: HKCU; Subkey: "Environment"; ValueType:string; ValueName:"JAVA_HOME"; ValueData:"{pf}\Java"; Flags: preservestringtype

[Setup]
; Tell Windows Explorer to reload the environment
ChangesEnvironment=yes

I’m not sure which environment variable you want to set — PATH or JAVA_HOME — so I’ve added them both.

Changing PATH shouldn’t be necessary since the Java installer tends to add itself to the path; IIRC it copies java.exe and javaw.exe to one of the system directories.