Updating text file in java
You can specify the formatters to be used by a formatted text field in several ways: example that uses formatter factories to set multiple editors for the Loan Amount and APR fields.While the user is editing the Loan Amount, the $ character is not used so that the user is not forced to type it.Alternatively, to compile and run the example yourself, consult the example index.The following code that creates the formatters and sets them up by using instances of the private double rate = .075; //7.5 % ...
Whatever the component, we could still use the When you set the value of a formatted text field, the field's text is updated to reflect the value.
The formatter translates the field's value into the text it displays, and the text into the field's value.
Using the formatters that Swing provides, you can set up formatted text fields to type dates and numbers in localized formats.
The rest of this section covers the following topics: rate Field = new JFormatted Text Field(percent Format); rate Value(new Double(rate)); rate Columns(10); rate Property Change Listener("value", this); num Periods Field = new JFormatted Text Field(); num Periods Value(new Integer(num Periods)); num Periods Columns(10); num Periods Property Change Listener("value", this); payment Field = new JFormatted Text Field(payment Format); payment Value(new Double(payment)); payment Columns(10); payment Editable(false); payment Foreground(Color.red); ...
percent Format = Number Number Instance(); percent Minimum Fraction Digits(2); payment Format = Number Currency Instance(); objects. How to specify formats and formatters is covered later in this section.