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Java Collection, TreeSet Exercises: Iterate through all elements in a tree set

Java Collection, TreeSet Exercises: Exercise-2 with Solution

Write a Java program to iterate through all elements in a tree set.

Sample Solution:

Java Code:

import java.util.TreeSet;
public class Exercise2 {
  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");
  // Print the tree list
  for (String element : tree_set) {
    System.out.println(element);
    }
 }
}

Sample Output:

Black                                                                  
Green                                                                  
Orange                                                                 
Red                                                                    
White 

Flowchart:

Flowchart: Iterate through all elements in a tree set

Java Code Editor:

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Previous: Create a new tree set, add some colors and print out the tree set.
Next: Add all the elements of a specified tree set to another tree set.

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Java: Tips of the Day

getEnumMap

Converts to enum to Map where key is the name and value is Enum itself.

public static <E extends Enum<E>> Map<String, E> getEnumMap(final Class<E> enumClass) {
    return Arrays.stream(enumClass.getEnumConstants())
            .collect(Collectors.toMap(Enum::name, Function.identity()));
}

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