gistfile1.java

import groovy.beans.Bindable
import groovy.swing.SwingBuilder

class Foo {
  @Bindable Bar bar
}

class Bar {
  @Bindable String baz
}

def foo = new Foo()
foo.bar = new Bar()
def swing = new SwingBuilder()
swing.edt {
  frame( title: "Binding", size: [200,140], visible: true ) {
    gridLayout(cols: 1, rows: 3)
    textField(id: "t1", text: bind{foo.bar.baz})
    textField(id: "t2")
    button("Sync!", actionPerformed:{ foo.bar.baz = t2.text}) 
  }
}