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import java.math.BigDecimal;
import java.text.DecimalFormat;
import javax.swing.JFormattedTextField;
import javax.swing.text.DefaultFormatter;
import javax.swing.text.DefaultFormatterFactory;
import javax.swing.text.NumberFormatter;
public class Main {
public static void main(String[] argv) {
JFormattedTextField f = new JFormattedTextField(new BigDecimal("123.4567"));
DefaultFormatter fmt = new NumberFormatter(new DecimalFormat("#.0###############"));
fmt.setValueClass(f.getValue().getClass());
DefaultFormatterFactory fmtFactory = new DefaultFormatterFactory(fmt, fmt, fmt);
f.setFormatterFactory(fmtFactory);
BigDecimal bigValue = (BigDecimal) f.getValue();
}
}
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