Example usage for java.util Collections shuffle

Introduction

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

Prototype

public static void shuffle(List<?> list)

Source Link

Document

Randomly permutes the specified list using a default source of randomness.

Usage

From source file:Main.java

public static void main(String[] args) {
    ArrayList<String> arrayList = new ArrayList<String>();

    arrayList.add("A");
    arrayList.add("B");
    arrayList.add("C");
    arrayList.add("D");
    arrayList.add("E");

    System.out.println(arrayList);

    Collections.shuffle(arrayList);

    System.out.println(arrayList);

}

From source file:AlgorithmsDemo.java

public static void main(String args[]) {

    LinkedList<Integer> ll = new LinkedList<Integer>();
    ll.add(-8);//w  ww  . j ava  2s.c o m
    ll.add(20);
    ll.add(-20);
    ll.add(8);

    Comparator<Integer> r = Collections.reverseOrder();

    Collections.sort(ll, r);

    for (int i : ll)
        System.out.print(i + " ");

    Collections.shuffle(ll);

    System.out.print("List shuffled: ");
    for (int i : ll)
        System.out.print(i + " ");

    System.out.println("Minimum: " + Collections.min(ll));
    System.out.println("Maximum: " + Collections.max(ll));
}

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);//  ww  w. j av a 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);
}

From source file:Main.java

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

    // populate the list
    arrlist.add("A");
    arrlist.add("B");
    arrlist.add("from java2s.com");

    System.out.println("Initial collection: " + arrlist);

    // shuffle the list
    Collections.shuffle(arrlist);

    System.out.println("Final collection after shuffle: " + arrlist);
}

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  a  va  2s  .c  om

    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 + " ");
}

From source file:MainClass.java

public static void main(String args[]) {
    LinkedList<Integer> ll = new LinkedList<Integer>();
    ll.add(-8);//from   w w w . j av  a 2 s  . co  m
    ll.add(20);
    ll.add(-20);
    ll.add(8);

    Comparator<Integer> r = Collections.reverseOrder();

    Collections.sort(ll, r);

    System.out.print("List sorted in reverse: ");
    for (int i : ll) {
        System.out.print(i + " ");
    }

    System.out.println();

    Collections.shuffle(ll);

    System.out.print("List shuffled: ");
    for (int i : ll)
        System.out.print(i + " ");

    System.out.println();

    System.out.println("Minimum: " + Collections.min(ll));
    System.out.println("Maximum: " + Collections.max(ll));
}

From source file:ShuffleTest.java

public static void main(String[] args) {
    List<Integer> numbers = new ArrayList<Integer>();
    for (int i = 1; i <= 49; i++)
        numbers.add(i);//from w ww . java 2  s  .c o m
    Collections.shuffle(numbers);
    List<Integer> winningCombination = numbers.subList(0, 6);
    Collections.sort(winningCombination);
    System.out.println(winningCombination);
}

From source file:Shuffle.java

public static void main(String[] args) {
    List<String> list = Arrays.asList(args);
    Collections.shuffle(list);
    System.out.println(list);//from w  w w .ja  va2  s . c  om
}

From source file:Ran.java

public static void main(String[] args) {

    // Get and shuffle the list of arguments
    List<String> argList = Arrays.asList(args);
    Collections.shuffle(argList);

    // Print out the elements using JDK 8 Streams
    argList.stream().forEach(e -> System.out.format("%s ", e));

    // Print out the elements using for-each
    for (String arg : argList) {
        System.out.format("%s ", arg);
    }//from w ww.ja  va2  s. c  o  m

    System.out.println();
}

From source file:Deal.java

public static void main(String[] args) {
    if (args.length < 2) {
        System.out.println("Usage: Deal hands cards");
        return;/*  w  w w . j a  va  2  s  .  c  om*/
    }
    int numHands = Integer.parseInt(args[0]);
    int cardsPerHand = Integer.parseInt(args[1]);
    List<Card> deck = Deck.newDeck();
    Collections.shuffle(deck);
    if (numHands * cardsPerHand > deck.size()) {
        System.out.println("Not enough cards.");
        return;
    }

    for (int i = 0; i < numHands; i++)
        System.out.println(dealHand(deck, cardsPerHand));
}