How to add a custom checkbox into JList (Java)?

This is how the program looks:

This is how I want it to look:

As you can see in the picture I have tried a bit and learned that I need to use ListCellRenderer, but the problem is i have created 2 custom png files 1. checked.png and 2.unchecked.png, when I click daily goals #1 it should give state = true and checked.png should appear and stay checked unless I click it again. Unchecked.png could be standard on the jList column. I also want to place my checkbox 1 cm to the left of the end of the row (padding) not sure hows its done in java sadly. (You'll understand better by looking at the picture)

After looking through some guides I have learned that the only way to add extra stuff to a JList column is by using ListCellRenderer. I have tried quite a while with no success so thought of asking others. Does anyone have any ideas on how to do this?

The thought was to get it to work then display in a JTable by changing the Jtable column to Daily goals and displaying X to indicate the goal was achieved. But I think I should be able to do this, The main question is the custom checkbox implementation.