Home » Java » Java Programs

Java program to add non-common elements of one TreeSet into another TreeSet collection

Given two TreeSet collections, we have to add non-common elements of one TreeSet into another.
Submitted by Nidhi, on June 05, 2022

Problem statement

In this program, we will create two TreeSet collections with integer elements. Then we will add non-common elements of one TreeSet into another TreeSet collection using the addAll() method.

Java program to add non-common elements of one TreeSet into another TreeSet collection

The source code to add non-common elements of one TreeSet into another TreeSet collection is given below. The given program is compiled and executed successfully.

// Java program to add non-common elements of one TreeSet 
// into other TreeSet collection

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

public class Main {
  public static void main(String args[]) {
    TreeSet < Integer > tree1 = new TreeSet < Integer > ();
    TreeSet < Integer > tree2 = new TreeSet < Integer > ();

    tree1.add(10);
    tree1.add(20);
    tree1.add(30);

    tree2.add(10);
    tree2.add(40);
    tree2.add(50);
    tree2.add(60);

    System.out.println("TreeSet1 elements: " + tree1);
    System.out.println("TreeSet2 elements: " + tree2);

    tree1.addAll(tree2);

    System.out.println("\nTreeSet1 elements: " + tree1);
    System.out.println("TreeSet2 elements: " + tree2);
  }
}

Output

TreeSet1 elements: [10, 20, 30]
TreeSet2 elements: [10, 40, 50, 60]

TreeSet1 elements: [10, 20, 30, 40, 50, 60]
TreeSet2 elements: [10, 40, 50, 60]

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 two TreeSet collections tree1, tree2 and added integer elements using add() method. Then we added the non-common elements of the tree2 collection into the tree1 collection using the addAll() method and printed the updated tree sets.

Java TreeSet Programs »

---