Cannot invoke "java.util.function.Consumer.accept(Object)" because "this.onPageChange" is null when trying to setCurrentPage(1)

Question

Cannot invoke "java.util.function.Consumer.accept(Object)" because "this.onPageChange" is null when trying to setCurrentPage(1)

raph559 opened this issue 3 years ago · 2 comments

Hello !
I don't know how to fix that, maybe I'm just using the function wrong, but I don't think so.
Can someone help me ?

Answer 1 · 2022-02-03T16:49:27.000Z

Can you provide the stack trace and/or the snippet of code from your project where the error occurs?

Answer 2 · 2022-02-03T17:03:32.000Z

Of course, here it is :
configMenu.setButton(0, 10,new SGButton(new ItemBuilder(Material.BONE) .name("Editer les règles") .build()) .withListener(event -> {configMenu.setCurrentPage(1);}) );
The error refers to those lines on SGMenu.java :
public void setCurrentPage (int page) { this.currentPage = page; this.onPageChange.accept(this); }