w3resource

Java: Create a new tree set, add some colors and print out the tree set


1. Create and Print TreeSet

Write a Java program to create a tree set, add some colors (strings) and print out the tree set.

Sample Solution:

Java Code:

import java.util.TreeSet;
public class Exercise1 {
  public static void main(String[] args) {
  TreeSet<String> tree_set = new TreeSet<String>();
  tree_set.add("Red");
  tree_set.add("Green");
  tree_set.add("Orange");
  tree_set.add("White");
  tree_set.add("Black");
  System.out.println("Tree set: ");
  System.out.println(tree_set);
 }
}

Sample Output:

Tree set:                                                              
[Black, Green, Orange, Red, White] 

Flowchart:

Flowchart: Replace an element in a linked list

For more Practice: Solve these Related Problems:

  • Write a Java program to create a TreeSet of color names, add duplicate values, and then print the set to verify that duplicates are eliminated.
  • Write a Java program to create a TreeSet of colors and then use a custom Comparator to sort them by the length of the color name.
  • Write a Java program to create a TreeSet of colors and add elements in random order, then print the set to demonstrate its natural ordering.
  • Write a Java program to create a TreeSet of colors, convert each color to lowercase before insertion, and then display the sorted unique set.

Go to:


PREV : Java TreeSet Exercises Home.
NEXT : Iterate TreeSet Elements.

Java Code Editor:

Contribute your code and comments through Disqus.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Follow us on Facebook and Twitter for latest update.