Yes, you may reuse the Java environment included in the Portable version to run editors if needed: find in the jre folder the java or javaw executable of Java, and run it in a command followed by -jar and the path to the JAR executable file of the editor.

Using a cmd or Terminal window, this should take a few seconds if you follow these instructions:
1. Drag and drop the java or javaw executable in the cmd or Terminal window to copy its full path in it
2. Type a space, -jar and another space
3. Drag and drop the icon of the JAR executable file in the cmd or Terminal window to copy its full path in it
4. Type <Enter>

Under macOS, something like: If you want to reuse the same command often, consider saving it in a command file (.bat under Windows).