Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import com.google.common.primitives.Ints;
import javax.annotation.Nonnull;
import java.util.*;

public class Main {
    @Nonnull
    public static <T> Comparator<Collection<? extends T>> listComparator(
            @Nonnull final Comparator<? super T> elementComparator) {
        return new Comparator<Collection<? extends T>>() {
            @Override
            public int compare(Collection<? extends T> list1, Collection<? extends T> list2) {
                return compareAsList(elementComparator, list1, list2);
            }
        };
    }

    public static <T extends Comparable<? super T>> int compareAsList(@Nonnull Collection<? extends T> list1,
            @Nonnull Collection<? extends T> list2) {
        int res = Ints.compare(list1.size(), list2.size());
        if (res != 0)
            return res;
        Iterator<? extends T> elements2 = list2.iterator();
        for (T element1 : list1) {
            res = element1.compareTo(elements2.next());
            if (res != 0)
                return res;
        }
        return 0;
    }

    public static <T> int compareAsList(@Nonnull Comparator<? super T> elementComparator,
            @Nonnull Collection<? extends T> list1, @Nonnull Collection<? extends T> list2) {
        int res = Ints.compare(list1.size(), list2.size());
        if (res != 0)
            return res;
        Iterator<? extends T> elements2 = list2.iterator();
        for (T element1 : list1) {
            res = elementComparator.compare(element1, elements2.next());
            if (res != 0)
                return res;
        }
        return 0;
    }
}