In this example we shall show you how to remove an element from a TreeSet. To remove an element from a TreeSet, if it exists in the set one should perform the following steps:
- Create a new TreeSet.
- Populate the set with elements, with
add(E e)API method of TreeSet. - Remove an element from the TreeSet. Invoke the
remove(Object o)API method of TreeSet. It removes the specified element from the set, if the element exists in the set. The method returns true if the set contained the element and false otherwise,
as described in the code snippet below.
package com.javacodegeeks.snippets.core;
import java.util.TreeSet;
public class RemoveElementTreeSet {
public static void main(String[] args) {
// Create a TreeSet and populate it with elements
TreeSet treeSet = new TreeSet();
treeSet.add("element_1");
treeSet.add("element_2");
treeSet.add("element_3");
System.out.println("TreeSet contents : " + treeSet);
// boolean remove(Object o) method removes the specific object from the TreeSet if present and returns true, false otherwise
boolean removed = treeSet.remove("element_2");
System.out.println("TreeSet contents after removal of element_2 : " + treeSet);
}
}
Output:
TreeSet contents : [element_1, element_2, element_3]
TreeSet contents after removal of element_2 : [element_1, element_3]
This was an example of how to remove an element from a TreeSet in Java.
