Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Enumeration;

import java.util.List;
import java.util.Map;

public class Main {

    public static <V> List<V> uniteCollectionArray(Collection<V[]> values) {
        if (isEmpty(values)) {
            return Collections.emptyList();
        }
        List<V> copy = new ArrayList<V>();
        for (V[] collections : values) {
            copy.addAll(Arrays.asList(collections));
        }
        return copy;
    }

    public static boolean isEmpty(Map<?, ?> test) {
        return !isNotEmpty(test);
    }

    public static boolean isEmpty(Collection<?> test) {
        return !isNotEmpty(test);
    }

    public static boolean isEmpty(Object[] test) {
        return !isNotEmpty(test);
    }

    public static <V> List<V> asList(Enumeration<V> elements) {
        if (elements == null || !elements.hasMoreElements()) {
            return Collections.emptyList();
        }
        List<V> copy = new ArrayList<V>();
        for (; elements.hasMoreElements();) {
            copy.add(elements.nextElement());
        }
        return copy;
    }

    public static <E> List<E> asList(E... elements) {
        if (elements == null || elements.length == 0) {
            return Collections.emptyList();
        }
        // Avoid integer overflow when a large array is passed in
        int capacity = (int) Math.min(5L + elements.length + (elements.length / 10), Integer.MAX_VALUE);
        ArrayList<E> list = new ArrayList<E>(capacity);
        Collections.addAll(list, elements);
        return list;
    }

    public static boolean isNotEmpty(Map<?, ?> test) {
        return test != null && !test.isEmpty();
    }

    public static boolean isNotEmpty(Collection<?> test) {
        return test != null && !test.isEmpty();
    }

    public static boolean isNotEmpty(Object[] test) {
        return test != null && test.length > 0;
    }
}