Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import javax.swing.JButton;
import javax.swing.JFormattedTextField;
import javax.swing.JFrame;
import javax.swing.text.DateFormatter;
import javax.swing.text.DefaultFormatter;

public class Main {
    public static void main(String[] args) {
        DateFormatter[] formatters = new DateFormatter[] { new DateFormatter(new SimpleDateFormat("dd.MM.yyyy")),
                new DateFormatter(new SimpleDateFormat("ddMMyyyy")),
                new DateFormatter(new SimpleDateFormat("yyyy.MM.dd.")),
                new DateFormatter(new SimpleDateFormat("dd.MMM.yyyy")),
                new DateFormatter(new SimpleDateFormat("dd/MM/yyyy")) };
        MultiFormatter<DateFormatter> multiFormatter = new MultiFormatter<>(formatters);

        JFormattedTextField ftf = new JFormattedTextField(multiFormatter);
        ftf.setColumns(10);

        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(ftf);
        frame.add(new JButton("OK"));
        frame.pack();
        frame.setVisible(true);
    }
}

class MultiFormatter<F extends JFormattedTextField.AbstractFormatter> extends DefaultFormatter {

    private List<F> formatters;

    public MultiFormatter(F... formatters) {
        addFormatters(formatters);
    }

    public List<F> getFormatters() {
        if (formatters == null) {
            formatters = new ArrayList<>(25);
        }
        return formatters;
    }

    public void addFormatters(F... formatters) {
        getFormatters().addAll(Arrays.asList(formatters));
    }

    @Override
    public String valueToString(Object value) throws ParseException {

        String text = null;
        for (F formatter : getFormatters()) {
            try {
                text = formatter.valueToString(value);
                break;
            } catch (ParseException exp) {
                System.out.println("Could not find valid parser for " + value);
            }
        }
        return text;
    }

    @Override
    public Object stringToValue(String text) throws ParseException {
        Object value = null;
        for (F formatter : getFormatters()) {
            try {
                value = formatter.stringToValue(text);
                break;
            } catch (ParseException exp) {
                System.out.println("Could not find valid parser for " + value);
            }
        }
        return value;
    }
}