Java: Get NavigableSet view of the keys contained in a map

Java Collection, TreeMap Exercises: Exercise-18 with Solution

Write a Java program to get a NavigableSet view of keys in a map.

Sample Solution:-

Java Code:

import java.util.*;
import java.util.Map.Entry;  
public class Example18 {  
         public static void main(String args[]) {

  // Create a tree map
  TreeMap < Integer, String > tree_map1 = new TreeMap < Integer, String > ();

  // Put elements to the map 
  tree_map1.put(10, "Red");
  tree_map1.put(20, "Green");
  tree_map1.put(40, "Black");
  tree_map1.put(50, "White");
  tree_map1.put(60, "Pink");

  System.out.println("Orginal TreeMap content: " + tree_map1);
  System.out.println("Orginal TreeMap content: " + tree_map1.navigableKeySet());


Sample Output:

Orginal TreeMap content: {10=Red, 20=Green, 40=Black, 50=White, 60=Pink
Orginal TreeMap content: [10, 20, 40, 50, 60]

Java Code Editor:

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Java: Tips of the Day

Difference between jar and war in Java

From Java Tips: Difference between ear jar and war files:

These files are simply zipped files using the java jar tool. These files are created for different purposes. Here is the description of these files:

  • .jar files: The .jar files contain libraries, resources and accessories files like property files.
  • .war files: The war file contains the web application that can be deployed on any servlet/jsp container. The .war file contains jsp, html, javascript and other files necessary for the development of web applications.

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