TreeSet.java

// Java code to show creation, insertion, 
// searching, and traversal in a TreeMap 

import java.util.*; 
import java.util.concurrent.*; 

public class TreeMapImplementation { 

	// Declaring a TreeMap 
	static TreeMap<Integer, String> tree_map; 

	// Function to create TreeMap 
	static void create() 
	{ 
		// Creating an empty TreeMap 
		tree_map 
			= new TreeMap<Integer, String>(); 

		System.out.println( 
			"TreeMap successfully"
			+ " created"); 
	} 

	// Function to Insert values in 
	// the TreeMap 
	static void insert() 
	{ 
		// Mapping string values to int keys 
		tree_map.put(10, "Geeks"); 
		tree_map.put(15, "4"); 
		tree_map.put(20, "Geeks"); 
		tree_map.put(25, "Welcomes"); 
		tree_map.put(30, "You"); 

		System.out.println( 
			"\nElements successfully"
			+ " inserted in the TreeMap"); 
	} 

	// Function to search a key in TreeMap 
	static void search(int key) 
	{ 

		// Checking for the key 
		System.out.println( 
			"\nIs key \""
			+ key + "\" present? "
			+ tree_map.containsKey(key)); 
	} 

	// Function to search a value in TreeMap 
	static void search(String value) 
	{ 

		// Checking for the value 
		System.out.println( 
			"\nIs value \""
			+ value + "\" present? "
			+ tree_map.containsValue(value)); 
	} 

	// Function to display the elements in TreeMap 
	static void display() 
	{ 
		// Displaying the TreeMap 
		System.out.println( 
			"\nDisplaying the TreeMap:"); 

		System.out.println( 
			"TreeMap: " + tree_map); 
	} 

	// Function to traverse TreeMap 
	static void traverse() 
	{ 
		System.out.println("\nTraversing the TreeMap:"); 
		for (Map.Entry<Integer, String> e : tree_map.entrySet()) 
			System.out.println(e.getKey() 
							+ " "
							+ e.getValue()); 
	} 

	// Driver code 
	public static void main(String[] args) 
	{ 

		// Creating the TreeMap 
		create(); 

		// Inserting values in the TreeMap 
		insert(); 

		// Search key "50" in the TreeMap 
		search(50); 

		// Search value "Geeks" in the TreeMap 
		search("Geeks"); 

		// Display the elements in TreeMap 
		display(); 

		// Traverse the TreeMap 
		traverse(); 
	} 
}