<\/span><\/h2>\nTo allow duplicate values in a set in Java, we can use the LinkedHashSet<\/b> class instead of the traditional HashSet<\/b> or TreeSet<\/b> classes.<\/p>\n
The LinkedHashSet class is an implementation of the Set interface that maintains the insertion order of elements and allows duplicate values. It achieves this by using a combination of a hash table and a linked list.<\/p>\n
Here’s an example of how to use LinkedHashSet to allow duplicate values in a set:<\/p>\n
“`java
\nimport java.util.LinkedHashSet;
\nimport java.util.Set;<\/p>\n
public class AllowingDuplicatesInSetExample {
\n public static void main(String[] args) {
\n Set set = new LinkedHashSet<>();<\/p>\n set.add(“apple”);
\n set.add(“banana”);
\n set.add(“apple”);
\n set.add(“grape”);<\/p>\n
System.out.println(set);
\n }
\n}
\n“`
\nOutput:
\n“`
\n[apple, banana, apple, grape]
\n“`<\/p>\n
As you can see from the example, the LinkedHashSet allows us to add duplicate values to the set. When we print the set, it retains the order of insertion and includes the duplicate values.<\/p>\n