MyCustomButton.java

public class MyCustomButton extends Button {
  
  private static PseudoClass EXPLODING_PSEUDO_CLASS = PseudoClass.getPseudoClass("exploding");
  
  BooleanProperty exploding;
  
  public MyCustomButton() {
    exploding = new SimpleBooleanProperty(false);
    exploding.addListener(e -> pseudoClassStateChanged(EXPLODING_PSEUDO_CLASS, exploding.get()));
    
    getStyleClasses().add("exploding-button");
  }
  
  public void setExploding(boolean exploding) {
    this.exploding.set(exploding);
  }
  
  public boolean isExploding() {
    return this.exploding.get();
  }
}