Null values in HashSet − The HashSet object allows null values but, you can add only one null element to it. Collection you can put a single object into the map, but you retrieve a collection. How to Remove Duplicates from Java Collection MCQ This also allows duplicate data to be present in it. Key-Value pair – Store in key-value pairs. It can also be ordered by a Comparator … Solved Which of the following is true? A A list allows - Chegg Approach: Get the ArrayList with duplicate values. Duplicates : HashMap doesn't allow duplicate keys though it allows duplicate values while ArrayList does allows duplicates. A TreeMap is a part of the Java Collections Framework and is a map implementation. Engineering; Computer Science; Computer Science questions and answers; Which of the following is true? Store duplicate keys-values pair and sort the key-value The Collection interface specifies groups of objects known as elements. Can we add null elements to a Set in Java Null values in a Set object. It was compiled for Java 1.4. How can i have a HashMap in Java with duplicate keys?
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