How to make the selectFolder() function open using a default path

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@glv

File a = new File("d:/test");

Take notice Processing already provides many functions that return a File object, which can be invoked as soon as callback settings():

1. dataFile(): PApplet

2. sketchFile(): PApplet

3. saveFile(): PApplet

Any of those 3 functions can be used as the 3rd argument for selectFolder(): PApplet