Spinner Model Controls - The Definitive Guide to Java Swing - page 511

Table 14-8. JSpinner.ListEditor Properties

Property Name Data Type Access

model SpinnerListModel Read-only

JSpinner.NumberEditor Class
The NumberEditor works in a manner similar to the DateEditor , allowing you to enter strings to
customize the display format. Instead of working with the SimpleDateFormat , the NumberEditor
is associated with the DecimalFormat class of the java.text package. Just like DateEditor , it has
two constructors:

public JSpinner.NumberEditor(JSpinner spinner)
SpinnerModel model = new SpinnerNumberModel(50, 0, 100, .25);
JSpinner spinner = new JSpinner(model);
JComponent editor = JSpinner.NumberEditor(spinner);
spinner.setEditor(editor);

public JSpinner.NumberEditor(JSpinner spinner, String decimalFormatPattern)
SpinnerModel model = new SpinnerNumberModel(50, 0, 100, .25);
JSpinner spinner = new JSpinner(model);
JComponent editor = JSpinner.NumberEditor(spinner, "#,##0.###");
spinner.setEditor(editor);

The second constructor usage shows the default formatting string. It will try to use commas
if the number is large enough, and it will not show decimals if the value is a whole number.
As shown in Table 14-9, this editor has two properties.

Table 14-9. JSpinner.NumberEditor Properties

Property Name Data Type Access

format DecimalFormat

Read-only

model SpinnerNumberModel Read-only

Summary
In this chapter, you learned about Swing's JSpinner component. When your set of choices is
limited to a fixed set or a range of values, a JSpinner allows you to select a value by spinning
through the different choices. You learned how that set of choices could be provided: from a set
of dates with the SpinnerDateModel and DateEditor , with the SpinnerListModel and ListEditor ,
or via the SpinnerNumberModel and NumberEditor .
Chapter 15 moves beyond selection from a range of values and on to where a user actually
types in the whole content in the different text components.