Java ArrayList.subList方法代碼示例

import java.util.ArrayList; //導入方法依賴的package包/類
private void merge(ArrayList<T> listToSort, int start, int middle, int end) {
    ArrayList<T> A = new ArrayList<T>(listToSort.subList(start, middle + 1));
    ArrayList<T> B = new ArrayList<T>(listToSort.subList(middle + 1, end + 1));
    A.add(A.get(0).getMaxObject());
    B.add(B.get(0).getMaxObject());

    int i = 0;
    int j = 0;

    for (int k = start; k <= end; k++) {
        if (A.get(i).compareTo(B.get(j)) <= 0) {
            listToSort.set(k, A.get(i));
            i++;
        } else {
            listToSort.set(k, B.get(j));
            j++;
        }
    }
}
 

import java.util.ArrayList; //導入方法依賴的package包/類
private void LoadData() {
    MainSheetHelper helper = new MainSheetHelper(this, dbController);
    List<DBSongInfo> info = helper.getMainSheetSongInfo(MainSheetHelper.SHEET_ALL);
    ArrayList<DBSongInfo> result = DBSongInfo.descSortByPlayTimes(info);

    int count = getResources().getInteger(R.integer.rmp_count);
    count = count > result.size() ? result.size() : count;
    // 左閉右開
    for (DBSongInfo in : result.subList(0, count)) {
        RMPAdapter.DataHolder da = new RMPAdapter.DataHolder();
        da.times = in.playTimes;

        SongInfo songInfo = mediaManager.getSongInfo(this, in.path);
        String title = songInfo.getTitle();
        String arts = songInfo.getArtist();
        String albumP = songInfo.getAlbum_path();

        da.album = albumP;
        da.title = title;
        da.arts = arts;
        da.path = in.path;

        data.add(da);
    }

}
 

import java.util.ArrayList; //導入方法依賴的package包/類
public void tjek_hent_a_til_å() throws Exception {
  System.out.println("tjek_hent_a_til_å");
  backend.hentAlleProgramserierAtilÅ(NetsvarBehander.TOM);
  ArrayList<Programserie> liste = App.data.programserierAtilÅ.getListe();
  System.out.println("tjek_hent_a_til_å liste="+liste.size());
  assertTrue(liste.size()>0);

  int samletAntalUdsendelser = 0;

  // Tjek kun nummer 50 til nummer 100
  for (Programserie ps : liste.subList(50, 65)) {
    backend.hentProgramserie(ps, ps.slug, null, 0, NetsvarBehander.TOM);
    ArrayList<Udsendelse> udsendelser = ps.getUdsendelser();

    System.out.println(ps.slug + " " + ps.antalUdsendelser + " " + udsendelser.size());
    assertTrue(ps.slug + " har færre udsendelser end påstået:\n"+ps.titel, ps.antalUdsendelser>= udsendelser.size());
    samletAntalUdsendelser += udsendelser.size();
  }
  assertTrue("Kun "+samletAntalUdsendelser+" udsendelser!", samletAntalUdsendelser>10);
}
 

import java.util.ArrayList; //導入方法依賴的package包/類
public static ArrayList<MediaItem> getMediaItemFromPath(
        ArrayList<Path> paths, int start, int count,
        DataManager dataManager) {
    if (start >= paths.size()) {
        return new ArrayList<MediaItem>();
    }
    int end = Math.min(start + count, paths.size());
    ArrayList<Path> subset = new ArrayList<Path>(paths.subList(start, end));
    final MediaItem[] buf = new MediaItem[end - start];
    ItemConsumer consumer = new ItemConsumer() {
        @Override
        public void consume(int index, MediaItem item) {
            buf[index] = item;
        }
    };
    dataManager.mapMediaItems(subset, consumer, 0);
    ArrayList<MediaItem> result = new ArrayList<>();
    for (int i = 0; i < buf.length; i++) {
        if(buf[i]!=null) {
            result.add(buf[i]);
        }
    }
    return result;
}
 

import java.util.ArrayList; //導入方法依賴的package包/類
private static StringBuilder getOrderByForWith(StringBuilder sWith, ArrayList<String> tokens) {
    int posOfOrder = tokens.indexOf("order");
    sWith.append(" ORDER BY ");

    tokens = new ArrayList<>(tokens.subList(posOfOrder, tokens.size()));

    // deals with clauses such as ORDER BY <alias> ASC/DESC
    if (tokens.size() == 3 || tokens.size() == 4) {
        sWith.append(tokens.get(2)).append(" ").append((tokens.size() == 4) ? tokens.get(3) : "ASC");
        return sWith;
    }

    while (true) {
        String field = tokens.get(4);
        String dir = (tokens.get(5).equals("asc") || tokens.get(5).equals("desc")) ? tokens.get(5) : null;
        sWith.append(field).append(" ").append((dir == null) ? "" : dir);

        int posOfComma = tokens.indexOf(",");
        if (posOfComma == -1) break;
        else tokens = new ArrayList<>(tokens.subList(posOfComma + 1, tokens.size()));
    }
    return sWith;
}
 

import java.util.ArrayList; //導入方法依賴的package包/類
/**
 * Record the time for given lid, this is then stored to produce min/max/avg from.
 *
 * @param value timing to store
 */
public void recordTime(final long value) {
    runIdx++;
    latestTime = value;
    if (value < minTime) {
        minTime = value;
    }
    if (value > maxTime) {
        maxTime = value;
    }
    avgTime += value;
    // is it in topList?
    if (value > topList.get(topNbr - 1)) {
        ArrayList<Long> newTopList = new ArrayList<>(topList);
        newTopList.add(value);
        Collections.sort(newTopList, Collections.reverseOrder());
        topList = new ArrayList<>(newTopList.subList(0, topNbr));
    }
}
 

import java.util.ArrayList; //導入方法依賴的package包/類
/**
 * 批處理的執行<br>
 * 在內部線程裏調用
 */
@SuppressWarnings({ "rawtypes" })
private void executeCreate(final Map<Class, ArrayList<Object>> tempMap)
		throws Exception {
	for (Class clz : tempMap.keySet()) {

		ArrayList<Object> objList = tempMap.get(clz);
		
		String sql = MapperFactory.getSql(clz, Mapper.CREATE);
		
		List<BeanElement> eles = MapperFactory.getElementList(clz);
		
		/*
		 * 分段批處理，每段不超過MAX_BATCH
		 */
		int size = objList.size();
		int times = size / MAX_BATCH + 1;

		for (int i = 0; i < times; i++) {

			int segment = 0;
			if (i + 1 == times) {
				segment = size % MAX_BATCH;
				if (segment == 0){
					break;
				}
			}else{
				segment = MAX_BATCH;
			}
			
			int fromIndex = i * MAX_BATCH;
			List<Object> subList = objList.subList(fromIndex, fromIndex + segment);
			batchCreate(subList, sql, eles);
			
		}

	}
}
 

import java.util.ArrayList; //導入方法依賴的package包/類
/**
 * Obtain partial set of the raster
 * @param from lower index
 * @param to upper index
 * @return list of the contained raster points at the provided indices, or null if invalid
 */
@Override
public List<RasterPoint> getSubList(int from, int to) {
    ArrayList<RasterPoint> values = new ArrayList<>(points.values());
    try {
        int size = values.size();
        if (to >= size && from < size) {
            return values.subList(from, size - 1);
        }
        return values.subList(from, to);
    } catch (IndexOutOfBoundsException ie) {
        log.error("The provided indices were invalid! from={}, to={}", from, to);
        return null;
    }
}
 

import java.util.ArrayList; //導入方法依賴的package包/類
@Override
public IEquation<T> convert(ArrayList<IElementRepresentation<T>> equation) throws ConvertionException {
	if(equation == null || equation.size() < 2) {
		throw new ConvertBinaryOperatorException();
	}
	
	int rightOperandStartIndex = getRightOperandStartIndex(equation);
	ArrayList<IElementRepresentation<T>> leftEquationRepresentation = new ArrayList<>(equation.subList(0, rightOperandStartIndex));
	ArrayList<IElementRepresentation<T>> rightEquationRepresentation = new ArrayList<>(equation.subList(rightOperandStartIndex, equation.size()));
	
	IEquation<T> leftEquation = leftEquationRepresentation.get(0).convert(new ArrayList<>(leftEquationRepresentation.subList(1, leftEquationRepresentation.size())));
	IEquation<T> rightEquation = rightEquationRepresentation.get(0).convert(new ArrayList<>(rightEquationRepresentation.subList(1, rightEquationRepresentation.size())));
	
	return build(leftEquation, rightEquation);
}
 

import java.util.ArrayList; //導入方法依賴的package包/類
@Test
public void testGetKRandomMaxima() {
    final double[] array = new double[100];
    for (int i = 0; i < array.length; i++) {
        array[i] = Math.random();
    }
    final ValueIndexPair[] valIndexArray =
            ValueIndexPair.transformArray2ValueIndexPairArray(array);
    final ArrayList<ValueIndexPair> expectedFullList =
            new ArrayList<ValueIndexPair>(Arrays.asList(valIndexArray));

    final Comparator<ValueIndexPair> comparator =
            new Comparator<ValueIndexPair>() {
                @Override
                public int compare(final ValueIndexPair o1,
                        final ValueIndexPair o2) {
                    if (o1.getValue() < o2.getValue()) {
                        return 1;
                    } else if (o1.getValue() > o2.getValue()) {
                        return -1;
                    } else {
                        return 0;
                    }
                }
            };

    expectedFullList.sort(comparator);
    final List<ValueIndexPair> expected = expectedFullList.subList(0, 19);

    final ArrayList<ValueIndexPair> result =
            new ArrayList<ValueIndexPair>(Arrays.asList(
                    ValueIndexPair.getK(valIndexArray, 20, comparator)));

    for (final ValueIndexPair pair : expected) {
        assertTrue(result.contains(pair));
    }
}
 

import java.util.ArrayList; //導入方法依賴的package包/類
private static Result getResult(final int capitalizeType, final Locale locale,
        final int suggestionsLimit, final float recommendedThreshold, final String originalText,
        final SuggestionResults suggestionResults) {
    if (suggestionResults.isEmpty() || suggestionsLimit <= 0) {
        return new Result(null /* gatheredSuggestions */,
                false /* hasRecommendedSuggestions */);
    }
    final ArrayList<String> suggestions = new ArrayList<>();
    for (final SuggestedWordInfo suggestedWordInfo : suggestionResults) {
        final String suggestion;
        if (StringUtils.CAPITALIZE_ALL == capitalizeType) {
            suggestion = suggestedWordInfo.mWord.toUpperCase(locale);
        } else if (StringUtils.CAPITALIZE_FIRST == capitalizeType) {
            suggestion = StringUtils.capitalizeFirstCodePoint(
                    suggestedWordInfo.mWord, locale);
        } else {
            suggestion = suggestedWordInfo.mWord;
        }
        suggestions.add(suggestion);
    }
    StringUtils.removeDupes(suggestions);
    // This returns a String[], while toArray() returns an Object[] which cannot be cast
    // into a String[].
    final List<String> gatheredSuggestionsList =
            suggestions.subList(0, Math.min(suggestions.size(), suggestionsLimit));
    final String[] gatheredSuggestions =
            gatheredSuggestionsList.toArray(new String[gatheredSuggestionsList.size()]);

    final int bestScore = suggestionResults.first().mScore;
    final String bestSuggestion = suggestions.get(0);
    final float normalizedScore = BinaryDictionaryUtils.calcNormalizedScore(
            originalText, bestSuggestion, bestScore);
    final boolean hasRecommendedSuggestions = (normalizedScore > recommendedThreshold);
    return new Result(gatheredSuggestions, hasRecommendedSuggestions);
}
 

import java.util.ArrayList; //導入方法依賴的package包/類
/**
 * search class with binary search
 *
 * @param simpleName - simple class name
 */
@Nullable
private List<Pair<String, Class>> binarySearch(ArrayList<Pair<String, Class>> classes, String simpleName) {
    //find left index
    int start = -1, end = -1;
    int left = 0;
    int right = classes.size() - 1;
    //search left most
    while (left <= right) {
        int mid = (left + right) / 2;
        String midValue = classes.get(mid).first.substring(0, Math.min(classes.get(mid).first.length(),
                simpleName.length()));
        if (midValue.compareTo(simpleName) < 0) { //mid < key
            left = mid + 1;
        } else if (midValue.compareTo(simpleName) > 0) {
            right = mid - 1;
        } else {
            start = mid;
            end = mid;
            //exit here
            while (start >= 0 && classes.get(start).first.substring(0, Math.min(classes.get(start).first.length(),
                    simpleName.length())).equals(simpleName)) {
                start--;
            }
            //exit here
            while (end < classes.size() && classes.get(end).first.substring(0, Math.min(classes.get(end).first.length(),
                    simpleName.length())).equals(simpleName)) {
                end++;
            }
            start++;
            end--;
            break;
        }
    }
    if (end >= 0 && start >= 0 && end - start + 1 >= 1) {
        return classes.subList(start, end + 1);
    }
    return null;
}
 

import java.util.ArrayList; //導入方法依賴的package包/類
private String join(ArrayList<String> items, int start, int end, String s) {
    List<String> strings = items.subList(start, end + 1);
    StringBuilder result = new StringBuilder();
    for (int i = 0; i < strings.size(); i++) {
        result.append(strings.get(i)).append(i == strings.size() - 1 ? "" : s);
    }
    return result.toString();
}
 

import java.util.ArrayList; //導入方法依賴的package包/類
public static void main(String[] args) {

    //create an ArrayList object
    ArrayList arrayList = new ArrayList();

    //Add elements to Arraylist
    arrayList.add("1");
    arrayList.add("2");
    arrayList.add("3");
    arrayList.add("4");
    arrayList.add("5");

    /*
       To get a sub list of Java ArrayList use
       List subList(int startIndex, int endIndex) method.
       This method returns an object of type List containing elements from
       startIndex to endIndex - 1.
    */

    List lst = arrayList.subList(1, 3);

    //display elements of sub list.
    System.out.println("Sub list contains : ");
    for (int i = 0; i < lst.size(); i++) System.out.println(lst.get(i));

    /*
      Sub List returned by subList method is backed by original Arraylist. So any
      changes made to sub list will also be REFLECTED in the original Arraylist.
    */
    //remove one element from sub list
    Object obj = lst.remove(0);
    System.out.println(obj + " is removed from sub list");

    //print original ArrayList
    System.out.println("After removing " + obj + " from sub list, original ArrayList contains : ");
    for (int i = 0; i < arrayList.size(); i++) System.out.println(arrayList.get(i));
  }
 

import java.util.ArrayList; //導入方法依賴的package包/類
public  static void initialMusicDate(Context context){
    int number = 18;
    SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(context);
    String suggestion = sharedPref.getString("suggestion", "");
    switch (suggestion) {
        case "three":
            number = 3;
            break;
        case "six":
            number = 6;
            break;
        case "twelve":
            number =12;
            break;
        case "eighteen":
            number =18;
            break;
        default:
    }
    ArrayList<music_date> music_dates = new ArrayList<music_date>();
    _date = new Date[musicInfoArrayList.size()];

    for (int i = 0; i < musicInfoArrayList.size(); i++) {
        File music = new File(musicInfoArrayList.get(i).getMusicData());
        Date date = new Date(music.lastModified());
        _date[i] = date;
        music_dates.add(new music_date(i,_date[i]));
    }

    //從最近到之前排列
    Comparator<music_date> Datecomparator = new Comparator<music_date>() {
        @Override
        public int compare(music_date t1, music_date t2) {
            if (t1.getDate().before(t2.getDate())) {
                return 1;
            } else if (t1.getDate().after(t2.getDate())){
                return  -1;
            }else {
                return 0;
            }
        }

    };
    Collections.sort(music_dates,Datecomparator);
    //獲取最近歌曲
    if (number >music_dates.size()){number = music_dates.size();}
    Datesublist = music_dates.subList(0,number);
}