How do I change the Javadocs template generated in Eclipse?

Check Preferences / Java / Code Style / Code Template

Section Comment / Type

You can replace the author tag by whatever value you need and it will have an effect on new generated classes.

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However, if the template is fine, but the value referenced buy the author tag is not, see this SO question:

${user} uses the value of the user.name environment variable; therefore, you can pass -Duser.name=My Name in eclipse.ini to override it.

Or, if you prefer, you can modify the shortcut to point to:

C:/java/eclipse/eclipse.exe -vmargs -Duser.name="cleverUserNameToUseInSourceCode"

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• MacOs: Aram Kocharyan mentions the eclipse.ini is in Eclipse.app/Contents/MacOS/ if you right click and go Show Package Content.
• ZendStudio: rofflox comments the file is named ZendStudio.ini and is found in Applications/Zend Studio.app/Contents/MacOS/.

To use a Git username and email you can use the variables ${name:git_config(user.name)} and ${email:git_config(user.email)}.

Look at Window -> Preferences -> Java -> Editor -> Templates.

Spring Tool Suite (popular Eclipse customization for Spring development) uses STS.ini. On Windows I found it in the same dir as an app launch executable.