Fill In The Blank. Hint: look at the declaration of a HashMap in the code above. What do we declare for key and value? Because a HashMap requires both keys and values, we must provide the declare it. for both the key and the value when we
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Help with this java question:
Map<KeyType, ValueType> mapName = new HashMap<>();
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- Java Code: Add a HashMap to your Lexer class and initialize all the keywords. Change your lexer so that it checks each string before making the WORD token and creates a token of the appropriate type if the work is a key word. When the exact type of a token is known, you should NOT fill in the value string, the type is enough. For tokens with no exact type we still need to fill in the token’s string. Rename “WORD” to “IDENTIFIER”. Strings and characters will require some additions to your state machine. Create “STRINGLITERAL” and “CHARACTERLITERAL” token types. These cannot cross line boundaries. Your lexer should throw an exception if it encounters a character that it doesn’t expect outside of a comment, string literal or character literal. Create a new exception type that includes a good error message and the token that failed. Ensure that the ToString method prints nicely. Add “line number” to your Token class. Keep track of the current line number in your lexer and populate each…Write code to create three instances of a HashMap class. Give two the same, and the third different data. Compare the objects and state the resultJava Code: Look through the Language Description and build a list of keywords. Add a HashMap to your Lexer class and initialize all the keywords. Change your lexer so that it checks each string before making the WORD token and creates a token of the appropriate type if the work is a key word. When the exact type of a token is known (like “WHILE”), you should NOT fill in the value string, the type is enough. For tokens with no exact type (like “hello”), we still need to fill in the token’s string. Finally, rename “WORD” to “IDENTIFIER”. Similarly, look through the Language Description for the list of punctuation. A hash map is not necessary or helpful for these – they need to be added to your state machine. Be particularly careful about the multi-character operators like := or >=. These require a little more complexity in your state machine. Strings and characters will require some additions to your state machine. Create “STRINGLITERAL” and “CHARACTERLITERAL” token types. These…
- la) Declare and instantiate a HashMap object named hMap whose values are Integers and keys are Strings. 1b) Write a for-each loop to find the total of the values in this HashMap.. Write a code using the following hints and apply HashMap<K, V> and its methods get and put for public class CourseInformation (i) Create a HashMap object called Course to add a key and its value. //Key is your course name and value is your course code. (ii) Use put method to map a course name with the course code. // add any FOUR COURSE NAMES WITH ITS COURSE CODE which are represented as a String (iii) Use get method to find the course code for any one of the course.1: Create a new class with attributes name and address. Both data type will be String. Create a constructor and assign the parameters to the attributes. Now override the toString() method. Is this possible? 2: Create a class with the main method and create an instance of the class that you created in Test Stem 1. What method can you call to get the hashCode of your class? 3: What is the return type of the hash code ? 4: Create an instance of the string in your test class and assign a value. Which of the following operators can be used in conjunction with a string object? + - & . += 5: Supposed that we have a string with a value “This is my string.”. Which method can be used to extract a specific word from the given string? 6: Supposed that we have a string with a value “This is my string.”. Which expression can be used to extract the word “my” from the given string? 7: Now create an String and assign a value with spaces in the beginning, end and middle. Try out the method…
- ' make a hashmap ' import hashlib import sys def insert (hashmap, key, value): ' insert a key value pair into the hashmap ' hashmap[key] = value def remove (hashmap, key): ' remove a key value pair from the hashmap ' del hashmap[key] def search (hashmap, key): ' search for a key in the hashmap ' if key in hashmap: return hashmap[key] else: return None def print (hashmap): ' print the hashmap ' for key in hashmap: print (key, ":", hashmap[key]) 'end of print' def main (): 'make a menu that lets the user call the functions' hashmap = {} while True: print (""" Menu: 1. Insert 2. Remove 3. Search 4. Print 5. Quit """) choice = input ("Enter your choice: ") if choice == "1": key = input ("Enter the key: ") value = input ("Enter the value: ") insert (hashmap, key, value) elif choice == "2":…Is the following declaration of a HashMap valid: HashMap nun new HashMap(); True FalseUse java Write a Java program using Bluej to display the courses names like Algorithm, Artificial Intelligence, Data Structures, and Object Oriented programming using HashSet. List the course names in the print method, which does not return the results. Show the Hashset maintain any specific order if any.
- JavaScript The jQuery "post" method that we used in this course to enable "round-trip" dialog with the node.js server has the form: $.post("/", x, y); Describe the type and purpose of the x and y parameters.Hashing Create a method hashSetExe to use Java HashSet to store elements and print them. For example, input the elements: “Apple”, “Mango”, and “Grapes”. Please state what the output would be when printing the HashSet with the three elements. Create a method treeSetExe to use Java TreeSet to store elements and print them. For example, input the elements: “Apple”, “Mango”, and “Grapes”. Please state what the output would be when printing the TreeSet with the three elements. Create a hashing function that takes the string, calculate the sum of the ASCII code of each character, and return (sum%tableSize) as the index. For example, hash(“ab”, 11) returns 8, because ‘a’ is 97 and ‘b’ is 98, which adds up to 195, and 195%11 returns 8.Q6) Answer the following: [2 Marks] a) Write a small code fragment that generates a random integer number using Random class . b) How do you check whether a given key is contained in a map? (Give a Java code example.) c) Create a class MapTester. In it, use a HashMap to implement a phone Book. In this class, implement two methods: public void enterNumber(String name, String number) public String lookupNumber(String name) The methods should use the put and get methods of the HashMap class to implement their functionality