scramble List - Android java.util

Android examples for java.util:List

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Description

scramble List

Demo Code


//package com.java2s;
import java.security.SecureRandom;
import java.util.ArrayList;
import java.util.List;

public class Main {
    private static SecureRandom random = new SecureRandom();

    public static <T extends Object> void scramble(List<T> list) {

        List<T> tmpList = new ArrayList<T>();
        for (int i = 0; i < 2; i++) {
            tmpList.clear();//from w w  w.ja va 2s .  com
            tmpList.addAll(list);
            list.clear();

            while (tmpList.size() > 0) {
                list.add(tmpList.remove((int) (tmpList.size() * random())));
            }
        }
    }

    public static double random() {
        return random.nextDouble();
    }
}

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