Java: Add all the elements of a specified tree set to another tree set

Last update on May 22 2025 13:15:45 (UTC/GMT +8 hours)

3. Add Elements to Another TreeSet

Write a Java program to add all the elements of a specified tree set to another tree set.

Sample Solution:

Java Code:

import java.util.TreeSet;
public class Exercise3 {
  public static void main(String[] args) {
  TreeSet<String> tree_set1 = new TreeSet<String>();
  tree_set1.add("Red");
  tree_set1.add("Green");
  tree_set1.add("Orange");
  System.out.println("Tree set1: "+tree_set1);
  TreeSet<String> tree_set2 = new TreeSet<String>();
  tree_set2.add("Pink");
  tree_set2.add("White");
  tree_set2.add("Black");
  System.out.println("Tree set2: "+tree_set2);
   // adding treetwo to treeone
   tree_set1.addAll(tree_set2);
   System.out.println("Tree set1: "+tree_set1);
 }
}

Sample Output:

Tree set1: [Green, Orange, Red]                                        
Tree set2: [Black, Pink, White]                                        
Tree set1: [Black, Green, Orange, Pink, Red, White]

Flowchart:

For more Practice: Solve these Related Problems:

Write a Java program to merge two TreeSets of strings and then print the resulting sorted set.
Write a Java program to add all elements from one TreeSet to another using addAll() and then remove duplicates from the merged set.
Write a Java program to create two TreeSets, merge them, and then display only the elements that are common to both sets.
Write a Java program to join two TreeSets of integers and then compute the sum of all elements in the resulting set.

Go to:

PREV : Iterate TreeSet Elements.
NEXT : Reverse Order TreeSet.

Java Code Editor:

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