How do I get buttons to fill a javafx gridpane?

Question

Java Swing has GridLayout, which allows you to specify a size for an array of widgets such as 3X4. The widgets then fill the panel they occupy. How do you get a s

Answer 1

I want to complete James_D's answer. I want to show how to achieve the same result using SceneBuilder.

In SceneBuilder select the Node to grow and set "Max Width" and "Max Height" to MAX_VALUE