check if two Collection are Same Size - Java java.util

Java examples for java.util:Collection Compare

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Description

check if two Collection are Same Size

Demo Code


import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

public class Main{
    public static void main(String[] argv){
        Collection collection1 = java.util.Arrays.asList("asdf","java2s.com");
        Collection collection2 = java.util.Arrays.asList("asdf","java2s.com");
        System.out.println(areSameSize(collection1,collection2));
    }//www  .ja v a 2s .  c  o  m
    public static <T> Boolean areSameSize(final Collection<T> collection1,
            final Collection<T> collection2) {
        if (isEmpty(collection1) && isEmpty(collection2))
            return Boolean.TRUE;

        if (collection1 == collection2)
            return Boolean.TRUE;

        if (isNotEmpty(collection1) && isNotEmpty(collection2)
                && (collection1.size() - collection2.size()) == 0)
            return Boolean.TRUE;

        return Boolean.FALSE;
    }
    public static <T> List<T> asList(Collection<T> collection) {
        if (isNotEmpty(collection))
            return new ArrayList<T>(collection);

        return new ArrayList<T>();
    }
    public static <T> List<T> asList(T[] elements) {
        return newList(elements);
    }
    public static <T> Boolean isEmpty(Collection<T> collection) {
        if (GeneralUtil.isNull(collection))
            return Boolean.TRUE;

        return collection.isEmpty();
    }
    public static <T> Boolean isNotEmpty(Collection<T> collection) {
        return !isEmpty(collection);
    }
    public static <T> List<T> newList(T... elements) {
        if (GeneralUtil.isNotNull(elements)) {
            ArrayList<T> arrayList = new ArrayList<T>(elements.length);
            arrayList.addAll(Arrays.asList(elements));
            return arrayList;
        }

        return new ArrayList<T>();
    }
}

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