Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import java.util.*;

public class Main {

    public static <T> List<T> sub(List<T> list, int start, int end) {
        if (list == null || list.isEmpty()) {
            return new ArrayList<>();
        }

        if (start < 0) {
            start = 0;
        }
        if (end < 0) {
            end = 0;
        }

        if (start > end) {
            int tmp = start;
            start = end;
            end = tmp;
        }

        final int size = list.size();
        if (end > size) {
            if (start >= size) {
                return new ArrayList<>();
            }
            end = size;
        }

        return list.subList(start, end);
    }

    public static <T> List<T> sub(Collection<T> list, int start, int end) {
        if (list == null || list.isEmpty()) {
            return new ArrayList<>();
        }

        return sub(new ArrayList<T>(list), start, end);
    }

    public static <T> boolean isEmpty(T[] array) {
        return array == null || array.length == 0;
    }

    public static boolean isEmpty(Collection<?> collection) {
        return collection == null || collection.isEmpty();
    }

    public static boolean isEmpty(Map<?, ?> map) {
        return map == null || map.isEmpty();
    }
}