package com.dj;

import java.util.HashMap;

import java.util.Map;

public class MapProgram {

public static void main(String[] args) {

Map<String, String> languages = new HashMap<>();

if(languages.containsKey("Java")) {

System.out.println("Java already exists");

} else {

languages.put("Java", "a compiled high level, object-oriented, platform independent language");

System.out.println("Java added successfully");

}

languages.put("Python","an interpreted, object-oriented, high-level programming language with dynamic semantics");

languages.put("Algol", "an algorithmic language");

System.out.println(languages.put("BASIC", "Beginners All Purposes Symbolic Instruction Code"));

System.out.println(languages.put("Lisp", "Therein lies madness"));

// System.out.println(languages.get("Java"));

if (languages.containsKey("Java")){

System.out.println("Java is already in the map");

}else {

languages.put("Java", "this course is about Java");

}

System.out.println("====================================");

// languages.remove("Lisp");

if(languages.remove("Algol", "an algorithmic language")) {

System.out.println("Algol removed");

}else {

System.out.println("Algol not removed, key/value pair not found");

}

if (languages.replace("Lisp", "Therein lies madness", "a functional programming language with imperative features")){

System.out.println("Lisp replaced");

}else {

System.out.println("Lisp was not replaced");

}

// System.out.println(languages.replace("Scala", "this will not be added"));

for (String key: languages.keySet()){

System.out.println(key + " : " + languages.get(key));

}

// System.out.println(languages.put("Java", "this course is about Java"));

// System.out.println(languages.get("Java"));

}

}