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Java program to get the elements greater than and equal to the specified item from TreeSet Collection

Given a TreeSet collection, we have to get the elements greater than and equal to the specified item.
Submitted by Nidhi, on June 08, 2022

Problem statement

In this program, we will create a TreeSet collection with integer elements. Then we will get the elements greater than and equal to the specified item from TreeSet Collection using the tailSet() method.

Source Code

The source code to get the elements greater than and equal to the specified item from TreeSet Collection is given below. The given program is compiled and executed successfully.

Example of TreeSet.tailSet() Method in Java

// Java program to get the elements greater than and equal to 
// the specified item from TreeSet Collection

import java.io.*;
import java.util.*;

public class Main {
  public static void main(String args[]) {
    TreeSet < Integer > tree = new TreeSet < Integer > ();

    tree.add(10);
    tree.add(20);
    tree.add(25);
    tree.add(30);
    tree.add(35);
    tree.add(40);

    TreeSet < Integer > tailSet = (TreeSet < Integer > ) tree.tailSet(15);

    System.out.println("TreeSet: " + tree);
    System.out.println("Tail Set: " + tailSet);
  }
}

Output

TreeSet: [10, 20, 25, 30, 35, 40]
Tail Set: [20, 25, 30, 35, 40]

Explanation

In the above program, we imported the "java.util.*", "java.io.*" packages to use the TreeSet class. Here, we created a public class Main.

The Main class contains a main() method. The main() method is the entry point for the program. And, created a TreeSet collection tree and added integer elements using add() method. Then we get the elements greater than and equal to the specified item from TreeSet Collection using the tailSet() method and printed the result.

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