Convert RealmResults to Java ArrayList – Android Realm Database Example
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try (Realm realm = Realm.getDefaultInstance()) { // Obtain the results of a query RealmResults<Model> results = realm.where(Model.class).findAll(); List<Model> list = new ArrayList<>(); list.addAll(realm.copyFromRealm(results)); } |
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import java.util.Arrays; import java.util.Iterator; import java.util.List; public class ArrayToList { public static void main(String[] argv) { String sArray[] = new String[] { "Array 1", "Array 2", "Array 3" }; // convert array to list List < String > lList = Arrays.asList(sArray); // iterator loop System.out.println("#1 iterator"); Iterator < String > iterator = lList.iterator(); while (iterator.hasNext()) { System.out.println(iterator.next()); } // for loop System.out.println("#2 for"); for (int i = 0; i < lList.size(); i++) { System.out.println(lList.get(i)); } // for loop advance System.out.println("#3 for advance"); for (String temp: lList) { System.out.println(temp); } // while loop System.out.println("#4 while"); int j = 0; while (j < lList.size()) { System.out.println(lList.get(j)); j++; } } } |
Following example uses rotate() method to rotate elements of the list depending on the 2nd argument of the method.
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import java.util.*; public class Main { public static void main(String[] args) { List list = Arrays.asList("one Two three Four five six".split(" ")); System.out.println("List :" + list); Collections.rotate(list, 3); System.out.println("rotate: " + list); } } |
Output: