Java: Get all keys from the given a Tree Map

Java Collection, TreeMap Exercises: Exercise-5 with Solution

Write a Java program to get all keys from a Tree Map.

Sample Solution:-

Java Code:

import java.util.*;  
public class Example5 {  
   public static void main(String args[]){  
   // Create a tree map
   TreeMap<String,String> tree_map1=new TreeMap<String,String>();      
   // Put elements to the map 
  tree_map1.put("C1", "Red");
  tree_map1.put("C2", "Green");
  tree_map1.put("C3", "Black");
  tree_map1.put("C4", "White"); 
    
 Set<String> keys = tree_map1.keySet();
        for(String key: keys){
            System.out.println(key);
        }
    }
}

Sample Output:

C1                                                                     
C2                                                                     
C3                                                                     
C4

Java Code Editor:

Contribute your code and comments through Disqus.

Previous: Search a value in a Tree Map.
Next: Delete all elements from a given Tree Map.