[FIXED] Can't set image to ImageView from resources (JavaFX)

Issue

trying set image to button, but receive NullPointerException.

structure:

resources
  com.example.test
    images
      file_open_icon.png

and code:

openImageview.setImage(new Image(Objects.requireNonNull(getClass().getResourceAsStream("images/file_open_icon.png"))));

Button:

<ToolBar prefHeight="40.0" prefWidth="200.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="25.0">
    <Button fx:id="toolbarHandleOpen" mnemonicParsing="false" onAction="#handle_open">
     <graphic>
        <ImageView fx:id="openImageview" fitHeight="23.0" fitWidth="23.0" pickOnBounds="true" preserveRatio="true" />
     </graphic>
    </Button>
</ToolBar>

Solution

I had tried to set the picture in the controller constructor, which caused the null pointer exception because the ImageView was not initialized at that time.

I moved the call to set the image to the controller initialize() method and it worked fine.

Answered By - Енот Полоскун
Answer Checked By - Willingham (JavaFixing Volunteer)