Question

I want to find out how to do custom binding on java, I’ve searching on google but not found any.
It’s simple problem,
I have two jSpinner, jSpin1 and jSpin2.
jSpin2 value is half from jSpin1.

when I do binding, there is

Binding source : jSpin1
Binding expression : ${value} 

so the value in jSpin2 exactly the same with jSpin1. then how could I make its value half from jSpin1?

thank you.

Answer 1

As I Understand you use NetBeans GUI Builder. You can do it by the next steps:

– do right click on jSpin2 (in design view) and select ‘Properties’

– select ‘Binding’ at the top of dialog

– click on ‘…’ button on ‘value’ property

– select ‘jSpin1’ from ‘Binding Source’

– select ‘value’ from ‘Binding Expression’

– edit ‘Binding Expression’ to ‘${value/2}’

(Also you can put ‘jSpin1[${value/2}]’ in ‘value’ property)