Handling Plurals in java (i18n) sample code. Reference: https://docs.oracle.com/javase/tutorial/i18n/format/choiceFormat.html

App.java

import java.io.IOException;
import java.text.ChoiceFormat;
import java.text.Format;
import java.text.MessageFormat;
import java.text.NumberFormat;
import java.util.Locale;
import java.util.ResourceBundle;

public class App {

    public static void main(String[] args) throws IOException {
        String baseName = "messages";
        Locale locale = Locale.US;
        ResourceBundle bundle = ResourceBundle.getBundle(baseName);

        // params
        double[] fileLimits = { 0, 1, 2 };
        String[] fileStrings = { bundle.getString("abc.xyz.noFiles"), bundle.getString("abc.xyz.oneFile"),
                bundle.getString("abc.xyz.multipleFiles") };

        String pattern = bundle.getString("abc.xyz.pattern");

        for (int i = 0; i < 5; i++) {
            Object[] messageArguments = { i, "XDisk" };

            System.out.println(doSomething(pattern, fileLimits, fileStrings, messageArguments, locale));
        }
    }

    public static String doSomething(String pattern, double[] fileLimits, String[] fileStrings,
            Object[] messageArguments, Locale locale) {
        MessageFormat messageFormat = new MessageFormat("", locale);
        ChoiceFormat choiceFormat = new ChoiceFormat(fileLimits, fileStrings);
        messageFormat.applyPattern(pattern);

        Format[] formats = { choiceFormat, null, NumberFormat.getInstance() };
        messageFormat.setFormats(formats);

        return messageFormat.format(messageArguments);

    }
}

messages_en_US.properties

Hello=Nice to meet you!
abc.xyz.pattern=There {0} on {1}.
abc.xyz.noFiles=are no files
abc.xyz.oneFile=is one file
abc.xyz.multipleFiles=are {0} files