Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.util.Collection;

import java.util.LinkedList;
import java.util.List;

public class Main {
    public static <T> void rotate(Collection<T> collection, int rotateStep) {
        List<T> list = new LinkedList<T>();
        list.addAll(collection);
        collection.clear();
        if (rotateStep > 0) {
            if (rotateStep > list.size())
                rotateStep %= list.size();
            collection.addAll(list.subList(list.size() - rotateStep, list.size()));
            collection.addAll(list.subList(0, list.size() - rotateStep));
        } else {
            if (Math.abs(rotateStep) > list.size())
                rotateStep %= list.size();
            rotateStep = Math.abs(rotateStep);
            collection.addAll(list.subList(rotateStep, list.size()));
            collection.addAll(list.subList(0, rotateStep));
        }
    }
}