✅ Java Swing JFormattedTextField – Overview & Usage JFormattedTextField is a Swing component that restricts input to a specific format such as numbers , dates , currency , phone numbers , etc. 🔧 Key Features Feature Description setValue(Object) Set initial/formatted value getValue() Get current formatted value setFormatterFactory(...) Set a custom formatter like number, date, etc. Supports masks Input masks (e.g., for phone numbers) Formatting on focus lost Value becomes formatted when user leaves the field ✅ Common Use Cases with Examples 1. Number Format import javax.swing.*; import java.text.NumberFormat; public class NumberFormattedField { public static void main(String[] args) { JFrame frame = new JFrame("Number Format"); frame.setSize(300, 100); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); NumberFormat numberFormat = NumberFormat.getNumberInstance(); JFormattedTextField ...
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