Extend README/code on how to run

[paulvi]

When running Main.java from IDEA, there is just no output at all

When runing mvn exec:exec on macOS, very tiny windows appeared with just 3 dots (standard OS command),
only after extended window, I could see and something meaningful.

I bet there must mimimal logging to show what part of execution has passed, and what point user should see some UI

[timfel]

Hi,

the README says that one should use mvn exec:exec, right? It's indeed not expected that it works with IDEA.

For the size, yes, the code should probably include something like this:

@@ -82,6 +82,7 @@ static GraphRenderer createPygalRenderer() {
      */
     static Frame createGraphWindow(GraphRenderer renderer) {
         Frame window = new Frame();
+        window.setSize(400, 400);
         window.setTitle("Java<->Python Graphing Example");
         window.setLayout(new GridBagLayout());

[yupeng33]

[fniephaus]

@yupeng33 is that with or without window.setSize(400, 400);?

[paulvi]

window.setSize(400, 400);

did not work for me. But it may be because AWT saves initial window size somewhere.