Java Collection, TreeSet Exercises: Get the first and last elements in a tree set
Java Collection, TreeSet Exercises: Exercise-5 with Solution
Write a Java program to get the first and last elements in a tree set.
Sample Solution:
Java Code:
import java.util.TreeSet;
public class Exercise5 {
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);
// Find first element of the tree set
Object first_element = tree_set.first();
System.out.println("First Element is: "+first_element);
// Find last element of the tree set
Object last_element = tree_set.last();
System.out.println("Last Element is: "+last_element);
}
}
Sample Output:
Tree set: [Black, Green, Orange, Red, White] First Element is: Black Last Element is: White
Flowchart:
Java Code Editor:
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Previous: Create a reverse order view of the elements contained in a given tree set.
Next: Clone a tree set list to another tree set.
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Java: Tips of the Day
How to sort an ArrayList?
Collections.sort(testList); Collections.reverse(testList);
That will do what you want. Remember to import Collections though!
Ref: https://bit.ly/32urdSe
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