Example usage for java.util Collections rotate

Introduction

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

Prototype

public static void rotate(List<?> list, int distance) 

Source Link

Document

Rotates the elements in the specified list by the specified distance.

Usage

From source file:Main.java

public static void main(String[] args) {
    List numbers = new ArrayList();

    for (int i = 0; i < 25; i++) {
        numbers.add(i);/*from   w  ww .j a v  a 2 s.c o m*/
    }

    System.out.println(Arrays.toString(numbers.toArray()));

    Collections.rotate(numbers, 10);

    System.out.println(Arrays.toString(numbers.toArray()));
}

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From source file:Main.java

public static void main(String args[]) {

    List<Character> ll = new LinkedList<Character>();

    for (char n = 'A'; n <= 'F'; n++)
        ll.add(n);//from w  w  w . ja  va 2  s. c o  m

    System.out.println(ll);
    Collections.reverse(ll);

    System.out.println(ll);
    Collections.rotate(ll, 2);

    System.out.println(ll);

    Collections.shuffle(ll);

    System.out.println(ll);
}

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From source file:Main.java

public static void main(String[] args) {
    List<String> list = new ArrayList<>();
    list.add("Java");
    list.add("R");
    list.add("CSS");
    list.add("XML");

    Collections.sort(list);/*from   www .  j  a v  a2s .c  o m*/
    System.out.println("List: " + list);

    // Rotate elements by 2
    Collections.rotate(list, 2);
    System.out.println("After  Rotating by  2: " + list);

}

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From source file:Main.java

public static void main(String[] args) {
    // create array list object
    List<Integer> numbers = new ArrayList<Integer>();

    // populate the list
    for (int i = 0; i < 15; i++) {
        numbers.add(i);/*w  w w  . j  a va2s . c o  m*/
    }

    System.out.println("Before : " + Arrays.toString(numbers.toArray()));

    // rotate the list at distance 10
    Collections.rotate(numbers, 10);

    System.out.println("After : " + Arrays.toString(numbers.toArray()));
}

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From source file:Main.java

public static void main(String args[]) {

    List<Character> ll = new LinkedList<Character>();

    for (char n = 'A'; n <= 'F'; n++)
        ll.add(n);/*from   w ww  .j  ava 2  s .c o m*/

    System.out.println("Here is the original list: ");
    for (Character x : ll)
        System.out.print(x + " ");
    Collections.reverse(ll);

    System.out.println("Here is the reversed list: ");
    for (Character x : ll)
        System.out.print(x + " ");
    Collections.rotate(ll, 2);

    for (Character x : ll)
        System.out.print(x + " ");

    Collections.shuffle(ll);

    System.out.println("Here is the randomized list:");
    for (Character x : ll)
        System.out.print(x + " ");
}

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From source file:Utilities.java

public static void main(String[] args) {
    List list = Arrays.asList("one Two three Four five six one".split(" "));
    System.out.println(list);/*from  w ww .j a  v  a2s .c o  m*/
    System.out.println("max: " + Collections.max(list));
    System.out.println("min: " + Collections.min(list));
    AlphabeticComparator comp = new AlphabeticComparator();
    System.out.println("max w/ comparator: " + Collections.max(list, comp));
    System.out.println("min w/ comparator: " + Collections.min(list, comp));
    List sublist = Arrays.asList("Four five six".split(" "));
    System.out.println("indexOfSubList: " + Collections.indexOfSubList(list, sublist));
    System.out.println("lastIndexOfSubList: " + Collections.lastIndexOfSubList(list, sublist));
    Collections.replaceAll(list, "one", "Yo");
    System.out.println("replaceAll: " + list);
    Collections.reverse(list);
    System.out.println("reverse: " + list);
    Collections.rotate(list, 3);
    System.out.println("rotate: " + list);
    List source = Arrays.asList("in the matrix".split(" "));
    Collections.copy(list, source);
    System.out.println("copy: " + list);
    Collections.swap(list, 0, list.size() - 1);
    System.out.println("swap: " + list);
    Collections.fill(list, "pop");
    System.out.println("fill: " + list);
    List dups = Collections.nCopies(3, "snap");
    System.out.println("dups: " + dups);
    // Getting an old-style Enumeration:
    Enumeration e = Collections.enumeration(dups);
    Vector v = new Vector();
    while (e.hasMoreElements())
        v.addElement(e.nextElement());
    // Converting an old-style Vector
    // to a List via an Enumeration:
    ArrayList arrayList = Collections.list(v.elements());
    System.out.println("arrayList: " + arrayList);

}

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From source file:Main.java

/**
 * Shift object to the top of list/*from  www.j  a  v  a  2s . co m*/
 *
 * @param list  list
 * @param index object index
 */
public static void shiftItemToFront(List<?> list, int index) {
    if (index >= 0) {
        Collections.rotate(list.subList(index, list.size()), -1);
    }
}

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From source file:Main.java

/**
 * Shift object to the bottom of list// w  w w  .j a  v  a 2s. co m
 *
 * @param list  list
 * @param index object index
 */
public static void shiftItemToBack(List<?> list, int index) {
    if (index >= 0) {
        Collections.rotate(list.subList(0, index + 1), 1);
    }
}

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From source file:Main.java

public static void move(List<?> collection, int indexToMoveFrom, int indexToMoveAt) {
    if (indexToMoveAt >= indexToMoveFrom) {
        Collections.rotate(collection.subList(indexToMoveFrom, indexToMoveAt + 1), -1);
    } else {//from www .  j a  v  a  2  s. c om
        Collections.rotate(collection.subList(indexToMoveAt, indexToMoveFrom + 1), 1);
    }
}

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From source file:Main.java

/**
 * Shift object in the list//from  w  w w.j ava  2  s .c  o  m
 *
 * @param list   list
 * @param index  object index
 * @param offset offset value can be positive or negative.
 * @return new index of the object
 */
public static int shiftItem(List<?> list, int index, int offset) {
    if (offset == 0 || index < 0) {
        return 0;
    }
    if (offset > 0) {
        int end = index + offset + 1;
        if (end > list.size()) {
            end = list.size();
        }
        Collections.rotate(list.subList(index, end), -1);
        return end - 1;
    } else {
        int start = index + offset;
        if (start < 0) {
            start = 0;
        }
        Collections.rotate(list.subList(start, index + 1), 1);
        return start;
    }
}

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