Java Collection, TreeSet Exercises: Create a reverse order view of the elements contained in a given tree set
Java Collection, TreeSet Exercises: Exercise-4 with Solution
Write a Java program to create a reverse order view of the elements contained in a given tree set.
Sample Solution:
Java Code:
import java.util.TreeSet;
import java.util.Iterator;
public class Exercise4 {
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
t_set.add("Red");
t_set.add("Green");
t_set.add("Black");
t_set.add("Pink");
t_set.add("orange");
// print original list
System.out.println("Original tree set:" + t_set);
Iterator it = t_set.descendingIterator();
// Print list elements in reverse order
System.out.println("Elements in Reverse Order:");
while (it.hasNext()) {
System.out.println(it.next());
}
}
}
Sample Output:
Original tree set:[Black, Green, Pink, Red, orange] Elements in Reverse Order: orange Red Pink Green Black
Flowchart:
Java Code Editor:
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Previous: Add all the elements of a specified tree set to another tree set.
Next: Get the first and last elements in a 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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