GeeksforGeeks

How to Avoid Duplicate User Defined Objects in TreeSet in Java?

Last Updated: 17 December 2020

TreeSet class in Java is part of Java’s collections framework which implements the NavigableSet interface, which provides functionalities to navigate through the SortedSet...read more

Technical Scripter 2020

Reversing Elements Order in TreeSet in Java Using the descendingIterator Method

Last Updated: 17 December 2020

The descendingIterator() method of java.util.TreeSetE class is used to return an iterator over the elements in the set in descending order. Once the iterator assigns with ...read more

Maximum value of expression (arr[i] + arr[j] * arr[k]) formed from a valid Triplet

Last Updated: 17 February 2023

Given an array arr[] of N integers. The task is to find the maximum value of (arr[i] + arr[j] * arr[k]) among every triplet (i, j, k) such that arr[i] arr[j] arr[k] and ...read more

TreeMap descendingKeySet() Method in Java with Examples

Last Updated: 16 November 2022

The descendingKeySet() method of TreeMap class returns a reverse order NavigableSet view of the keys contained within the map. The iterator of the set returns the keys in ...read more

java-treeset-functions

Find just strictly greater element from first array for each element in second array

Last Updated: 29 March 2023

Given two arrays A[] and B[] containing N elements, the task is to find, for every element in the array B[], the element which is just strictly greater than that element w...read more

Arrays

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Hash

Advanced Data Structure

Convert HashSet to TreeSet in Java

Last Updated: 03 January 2019

Hashset: Hashset in Java is generally used for operations like search, insert and delete. It takes constant time for these operations on average. HashSet is faster than Tr...read more

TreeSet pollFirst() method in Java

Last Updated: 28 December 2018

The pollFirst() method of TreeSet in Java is used to retrieves and removes the first (lowest) element, or returns null if this TreeSet is empty.Syntax:E pollFirst()Where, ...read more

Java

java-treeset

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java-treeset-functions

TreeSet hashCode() method in Java with Example

Last Updated: 27 December 2018

The hashCode() method of TreeSet in Java is used to get the hashCode value for this instance of the TreeSet. It returns an integer value which is the hashCode value for th...read more

TreeSet containsAll() method in Java with Example

Last Updated: 27 December 2018

The containsAll() method of Java TreeSet is used to check whether two sets contain the same elements or not. It takes one set as a parameter and returns True if all of the...read more

TreeSet retainAll() method in Java with Example

Last Updated: 27 December 2018

The retainAll() method of java.util.TreeSet class is used to retain from this set all of its elements that are contained in the specified collection.Syntax:public boolean ...read more

TreeSet toArray() method in Java with Example

Last Updated: 27 December 2018

The toArray() method of Java TreeSet is used to form an array of the same elements as that of the TreeSet. Basically, it copies all the element from a TreeSet to a new arr...read more

TreeSet toString() method in Java with Example

Last Updated: 30 July 2024

The toString() method of Java TreeSet is used to return a string representation of the elements of the Collection.The String representation comprises a set representation ...read more

TreeSet toArray(T[]) method in Java with Example

Last Updated: 27 December 2018

The toArray(T[]) method method of TreeSet class in Java is used to form an array of the same elements as that of the TreeSet. It returns an array containing all of the el...read more

TreeSet equals() method in Java with Example

Last Updated: 27 December 2018

The equals() method of java.util.TreeSet class is used to compare the specified object with this set for equality. Returns true if and only if the specified object is also...read more

TreeSet removeAll() method in Java with Example

Last Updated: 04 October 2019

The removeAll() method of java.util.TreeSet class is used to remove from this set all of its elements that are contained in the specified collection.Syntax:public boolean ...read more