Check if two collection contains the same elements - Java java.util

Java examples for java.util:Collection Contain

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Description

Check if two collection contains the same elements

Demo Code

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//package com.book2s;
import java.util.Collection;

public class Main {
    public static void main(String[] argv) {
        Collection c1 = java.util.Arrays.asList("asdf", "book2s.com");
        Collection c2 = java.util.Arrays.asList("asdf", "book2s.com");
        System.out.println(containsEqual(c1, c2));
    }

    public static <T> boolean containsEqual(Collection<T> c1,
            Collection<T> c2) {
        if (c1 == null && c2 == null) {
            return true;
        }

        if ((c1 == null && c2 != null) || (c1 != null && c2 == null)) {
            return false;
        }

        if (c1.size() != c2.size()) {
            return false;
        }

        return c1.containsAll(c2);
    }
}

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