Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;

public class Main {
    public static boolean containsDuplicates(Collection<?> coll) {
        if (coll == null)
            throw new IllegalArgumentException();

        Set<Object> set = new HashSet<>(coll);

        return set.size() != coll.size();
    }
}