Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import java.util.Comparator;

import java.util.List;

public class Main {
    public static <C extends Comparable<C>> Comparator<List<C>> getListComparator() {
        return new Comparator<List<C>>() {
            public int compare(List<C> list1, List<C> list2) {
                return compareLists(list1, list2);
            }
        };
    }

    /**
     * Provides a consistent ordering over lists. First compares by the first
     * element. If that element is equal, the next element is considered, and so
     * on.
     */
    public static <T extends Comparable<T>> int compareLists(List<T> list1, List<T> list2) {
        if (list1 == null && list2 == null)
            return 0;
        if (list1 == null || list2 == null) {
            throw new IllegalArgumentException();
        }
        int size1 = list1.size();
        int size2 = list2.size();
        int size = Math.min(size1, size2);
        for (int i = 0; i < size; i++) {
            int c = list1.get(i).compareTo(list2.get(i));
            if (c != 0)
                return c;
        }
        if (size1 < size2)
            return -1;
        if (size1 > size2)
            return 1;
        return 0;
    }
}