CzechCollationTest

CzechCollationTest.java

import java.text.Collator;
import java.util.*;

public class CzechCollationTest {
    public static void main(String[] args) {
        Locale locale = new Locale("cs");
        List<String> words = Arrays.asList(
            "Účetnictví", "Udržitelná", "Uhlovodíky", "Vízová",
            "Česká", "Řízení", "Škola", "Životní", "Chléb"
        );
        test(words, locale, null, "Without strength");
        test(words, locale, Collator.PRIMARY, "With PRIMARY");
        test(words, locale, Collator.SECONDARY, "With SECONDARY");
        test(words, locale, Collator.TERTIARY, "With TERTIARY");
        test(words, locale, Collator.IDENTICAL, "With IDENTICAL");
    }

    private static void test(List<String> list, Locale locale, Integer strength, String description) {
        // Avoid mutating the existing list.
        List<String> clone = new ArrayList<>(list);
        Collator collator = Collator.getInstance(locale);
        if (strength != null) {
            collator.setStrength(strength);
        }
        clone.sort(collator);
        System.out.println(description + ":" + String.join(", ", clone));
    }
}