w3resource

Java: Associate the specified value with the specified key in a TreeMap


1. Associate Value with Key in TreeMap

Write a Java program to associate the specified value with the specified key in a Tree Map.

Sample Solution:-

Java Code:

import java.util.*;  
public class Example1 {  
  public static void main(String args[]){  
   // Create a tree map
   TreeMap<Integer,String> tree_map=new TreeMap<Integer,String>();      
  // Put elements to the map 
  tree_map.put(1, "Red");
  tree_map.put(2, "Green");
  tree_map.put(3, "Black");
  tree_map.put(4, "White");
  tree_map.put(5, "Blue");
    
   for (Map.Entry<Integer,String> entry : tree_map.entrySet())
   {
    System.out.println(entry.getKey() + "=>" + entry.getValue());
   }
 }  
}

Sample Output:

1=>Red                                                                 
2=>Green                                                               
3=>Black                                                               
4=>White                                                               
5=>Blue

For more Practice: Solve these Related Problems:

  • Write a Java program to insert a key-value pair into a TreeMap and update the value if the key already exists.
  • Write a Java program to merge two TreeMaps such that if duplicate keys occur, their values are concatenated.
  • Write a Java program to add a key-value pair into a TreeMap and then remove it if the value meets a specific condition.
  • Write a Java program to use the compute() method in a TreeMap to update a key’s value based on its current value.

Go to:


PREV : Java TreeMap Exercises Home.
NEXT : Copy TreeMap to Another TreeMap.

Java Code Editor:

Contribute your code and comments through Disqus.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Follow us on Facebook and Twitter for latest update.