Java Collection, TreeSet Exercises: Get the number of elements in a tree set

Java Collection, TreeSet Exercises: Exercise-7 with Solution

Write a Java program to get the number of elements in a tree set.

Sample Solution:

Java Code:

import java.util.TreeSet;
import java.util.Iterator;

  public class Exercise7 {
  public static void main(String[] args) {
    // create an empty tree set
     TreeSet<String> t_set = new TreeSet<String>();
   // use add() method to add values in the tree set
     System.out.println("Original tree set: " + t_set);
    System.out.println("Size of the tree set: " + t_set.size());

Sample Output:

Original tree set: [Black, Green, Pink, Red, orange]                   
Size of the tree set: 5 


Flowchart: Get the number of elements in a tree set

Java Code Editor:

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Java: Tips of the Day

Choice between Float and Double:

Data type Bytes used Significant figures (decimal)
Float 4 7
Double 8 15

Double is often preferred over float in software where precision is important because of the following reasons:
Most processors take nearly the same amount of processing time to perform operations on Float and Double. Double offers far more precision in the same amount of computation time.

Ref: https://bit.ly/3oj7K2K