Example usage for java.util Collections swap

Introduction

In this page you can find the example usage for java.util Collections swap.

Prototype

private static void swap(Object[] arr, int i, int j)

Source Link

Document

Swaps the two specified elements in the specified array.

Usage

From source file:org.jiemamy.utils.collection.ListUtil.java

/**
 * ???index????????//from w  w  w . jav a  2  s. co m
 * 
 * @param list 
 * @param index 
 * @throws IllegalArgumentException ?{@code null}???
 * @throws IndexOutOfBoundsException if either index or index - 1 is out of range ((index - 1 < 0 || index >= list.size())).
 */
public static void moveUp(List<?> list, int index) {
    Validate.notNull(list);
    Collections.swap(list, index, index - 1);
}

From source file:org.jiemamy.utils.collection.ListUtil.java

/**
 * ??????/*  w  w w .  j  a  v a2s  .  co  m*/
 * 
 * @param list 
 * @throws IllegalArgumentException ?{@code null}???
 */
public static void reverse(List<?> list) {
    Validate.notNull(list);
    int center = list.size() / 2;
    int end = list.size() - 1;

    for (int i = 0; i < center; i++) {
        Collections.swap(list, i, end - i);
    }
}

From source file:edu.msu.cme.rdp.alignment.pairwise.PairwiseKNN.java

private static <T> void insert(T n, List<T> list, Comparator<T> comp, int k) {
    int i = list.size();
    list.add(n);// w  w  w .  jav  a 2s  . c o  m

    while (i > 0 && comp.compare(list.get(i), list.get(i - 1)) > 0) {
        Collections.swap(list, i, i - 1);
        i--;
    }

    if (list.size() > k) {
        list.remove(k);
    }
}

From source file:util.allocation.java

public static LinkedList<HOST> rankingHostlistFromCheapToHigh(LinkedList<String> HOSTIDList,
        LinkedList<HOST> HOSTList)

{
    LinkedList<HOST> rankedList = new LinkedList<HOST>();

    for (String currentHOSTID : HOSTIDList) {
        for (HOST currentHOST : HOSTList) {

            if (currentHOST.getID().equals(currentHOSTID))

            {//from   w  w  w.j a v a 2 s.  c  o  m
                rankedList.add(currentHOST);
            }

        }
    }

    int size = rankedList.size();
    for (int i = 0; i < size - 1; i++) {
        for (int j = i + 1; j < size; j++) {
            if (rankedList.get(i).getPrice() > rankedList.get(j).getPrice()) { // ??   
                Collections.swap(rankedList, i, j);
            }
        }
    }

    return rankedList;

}

From source file:bwem.util.Utils.java

public static <T> void fastErase(final List<T> list, final int index) {
    //        bwem_assert((0 <= i) && (i < (int)Vector.size()));
    if (!((0 <= index) && (index < list.size()))) {
        throw new IllegalArgumentException("index: " + index);
    }/*w  ww  .j a v a 2  s  .  co m*/

    Collections.swap(list, index, list.size() - 1);
    list.remove(list.size() - 1);
}

From source file:org.phoenicis.repository.types.MultipleRepository.java

public void moveRepository(Repository repository, int toIndex) {
    int oldIndex = this.repositories.indexOf(repository);

    Collections.swap(this.repositories, oldIndex, toIndex);
}

From source file:util.allocation.java

public static LinkedList<String> rankingHostlistFromCheapToHighAndReturnHOSTIDList(
        LinkedList<String> HOSTIDList, LinkedList<HOST> HOSTList)

{
    LinkedList<HOST> rankedList = new LinkedList<HOST>();

    for (String currentHOSTID : HOSTIDList) {
        for (HOST currentHOST : HOSTList) {

            if (currentHOST.getID().equals(currentHOSTID))

            {/*from www  .  j  a  v  a2  s. c o m*/
                rankedList.add(currentHOST);
            }

        }
    }

    int size = rankedList.size();
    for (int i = 0; i < size - 1; i++) {
        for (int j = i + 1; j < size; j++) {
            if (rankedList.get(i).getPrice() > rankedList.get(j).getPrice()) {
                Collections.swap(rankedList, i, j);
            }
        }
    }

    LinkedList<String> returnHOSTIDList = new LinkedList<String>();

    for (HOST currentHOST : rankedList) {
        returnHOSTIDList.add(currentHOST.getID());
    }

    return returnHOSTIDList;

}

From source file:com.xabber.android.ui.adapter.AccountListAdapter.java

@Override
public boolean onItemMove(int fromPosition, int toPosition) {
    if (fromPosition < toPosition) {
        for (int i = fromPosition; i < toPosition; i++) {
            Collections.swap(accountItems, i, i + 1);
        }/*from   w w w.j  a v  a2 s .  c o m*/
    } else {
        for (int i = fromPosition; i > toPosition; i--) {
            Collections.swap(accountItems, i, i - 1);
        }
    }
    notifyItemMoved(fromPosition, toPosition);
    return true;
}

From source file:de.kuschku.quasseldroid_ng.ui.coresettings.identity.nick.IdentityNickAdapter.java

@Override
public boolean onItemMove(int fromPosition, int toPosition) {
    Collections.swap(nicks, fromPosition, toPosition);
    notifyItemMoved(fromPosition, toPosition);
    return true;//from  ww  w  .j av a2 s.  co m
}

From source file:app.webelement.com.employeetracker.rd.RecyclerListAdapter.java

@Override
public boolean onItemMove(int fromPosition, int toPosition) {
    Collections.swap(mItems, fromPosition, toPosition);
    notifyItemMoved(fromPosition, toPosition);
    return true;/*from www . j  av  a 2 s.  c om*/
}