Error in Processing 4 (freezing with show usage, jump to declaration etc.)

Processing Beginners
5

Hello,

I got a reminder of this issue today with a degrees symbol ° in my code!

These actions on the the variable test will hang Processing 4.4.4 and I must end task with Task Manager in Windows 10:

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  • Rename

This simple code will hang Processing 4.4.4

int test;

String s = "Yaw (Y axis): 0°";

This is what is in my Processing temp folder after running (and hanging):

// Code removed from start

int test;

String s = "Yaw (Y axis): 0\u00b0";

//Code removed from end

This is safe to use the actions on:

int test;

String s = "Yaw (Y axis): 0\u00b0";

Including to be thorough:

image
image585×943 60.1 KB

Adding this to my Notes:

  • Do not use any special characters!
  • Substitute them with the \u character sequence (Unicode escape sequence).
Other issues < This need further exploration!

It also seems to freeze with the Lamba style in this code example and using actions:

import processing.javafx.*;
import javafx.application.Platform;

void setup() {
  size(600, 600, P3D); // Set 3D canvas size
  noLoop();
}

// Secondary PApplet used to bootstrap the JavaFX UI
public class FXBoot extends PApplet {

  public void setup() {
    size(200, 200, FX2D); // Minimal invisible canvas

    Platform.runLater(() -> launchUI()); // Lambda style — active
  }

  // Creates the JavaFX slider UI
  void launchUI() {
  }
}

Not the best example because it requires the JavaFX JAR files and is shared as example only to show what is failing.
This was part of much larger code and I reduced it down to this.
I will try to find a better example!

Deleting the line allows me to use actions without freezing:

Platform.runLater(() -> launchUI()); // Lambda style — active

This works so it is not just the Lamba style:

import javax.swing.SwingUtilities;

void setup() {
  SwingUtilities.invokeLater(() -> launchUI());  // <- Test rename/jump on launchUI
}

void launchUI() {
  println("launchUI called");
}

:)

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