java list<string> 排序_如何对List <String>重新排序
小编典典
您还可以使用TreeSet来消除重复项，并使用自己来消除ComparatorUS和GB。
由于每个国家/地区通常有多个区域设置，因此您会得到重复(这将消除这种情况)。有一个美国(西班牙)和一个美国(英语)，例如三个瑞士(法国，德国和意大利)。
public class AllLocales {
// Which Locales get priority.
private static final Locale[] priorityLocales = {
Locale.US,
Locale.UK
};
private static class MyLocale implements Comparable {
// My Locale.
private final Locale me;
public MyLocale(Locale me) {
this.me = me;
}
// Convenience
public String getCountry() {
return me.getCountry();
}
@Override
public int compareTo(MyLocale it) {
// No duplicates in the country field.
if (getCountry().equals(it.getCountry())) {
return 0;
}
// Check for priority ones.
for (int i = 0; i < priorityLocales.length; i++) {
Locale priority = priorityLocales[i];
// I am a priority one.
if (getCountry().equals(priority.getCountry())) {
// I come first.
return -1;
}
// It is a priority one.
if (it.getCountry().equals(priority.getCountry())) {
// It comes first.
return 1;
}
}
// Default to straight comparison.
return getCountry().compareTo(it.getCountry());
}
}
public static List listAll() {
Set byLocale = new TreeSet();
// Gather them all up.
for (Locale locale : Locale.getAvailableLocales()) {
final String isoCountry = locale.getDisplayCountry();
if (isoCountry.length() > 0) {
//System.out.println(locale.getCountry() + ":" + isoCountry + ":" + locale.getDisplayName());
byLocale.add(new MyLocale(locale));
}
}
// Roll them out of the set.
ArrayList list = new ArrayList<>();
for (MyLocale l : byLocale) {
list.add(l.getCountry());
}
return list;
}
public static void main(String[] args) throws InterruptedException {
// Some demo usages.
List locales = listAll();
System.out.println(locales);
}
}
2020-10-27