The SwingX library has a very handy AutoCompleteDecorator function.
Say you copy the values of your JTable column into an ArrayList called validValues. All you now need for autocompletion on the JTextField myTextField is the following code:
AutoCompleteDecorator.decorate(myTextField, validValues, true);
The third argument tells the autocomplete decorator whether you want strict matching, i.e. whether the user is allowed to enter values other than the ones in your JTable column or not.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…