I don't think Eclipse is Open Source Visual Age for Java. Both came from IBM but...
When the IBM rep cam to our company explaining the change he explained what changed and 3 of the points were why I used VAJ and Eclipse did not have them (at the time 10 years later it nearly had them).
VAJ worked with an included JRE that allowed you to edit code as it ran.
VAJ included a GUI builder
VAJ was organised around code structure and not files e.g. you chose packages and classes and methods and not by files.
> VisualAge for Java is based on an extended Smalltalk virtual machine which executes both Smalltalk and Java byte codes. Java natives were actually implemented in Smalltalk.[6]
> VisualAge Micro Edition, which supports development of embedded Java applications and cross system development, is a reimplementation of the IDE in Java. This version of VisualAge morphed into the Eclipse Framework.
When the IBM rep cam to our company explaining the change he explained what changed and 3 of the points were why I used VAJ and Eclipse did not have them (at the time 10 years later it nearly had them).
VAJ worked with an included JRE that allowed you to edit code as it ran. VAJ included a GUI builder VAJ was organised around code structure and not files e.g. you chose packages and classes and methods and not by files.
VAJ was based on the VA Smalltalk environment.