Is collection is empty, and all of its elements are empty : Collection « Collections Data Structure « Java

Is collection is empty, and all of its elements are empty


import java.util.Collection;
import java.util.Iterator;

public class Utils {

  public static <T> boolean isEmpty(Collection<T> c) {
    if (c == null || c.size() == 0) {
        return true;
    for (Iterator<T> iter = c.iterator(); iter.hasNext();) {
        if ( != null) {
            return false;
    return true;



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