Java Programs

Question: Evaluate a given prefix expression Resources: https://www.youtube.com/watch?v=o6vj5l_W2h8&list=PLdo5W4Nhv31bbKJzrsKfMpo_grxuLl8LU&index=37

Question: Evaluate a postfix expression

Question: Convert Postfix to infix expression Resources: https://www.youtube.com/watch?v=1zqgyoZzda4&list=PLdo5W4Nhv31bbKJzrsKfMpo_grxuLl8LU&index=38

Question: Convert an infix expression to a prefix expression Resource: https://www.youtube.com/watch?v=8QxlrRws9OI&list=PLdo5W4Nhv31bbKJzrsKfMpo_grxuLl8LU&index=35

Question: Convert an infix expression to a postfix expression Resources: https://www.youtube.com/watch?v=TB7qzDgX-pI

Question: Write a class ‘Stack’ that has:1. private data fields to store the stack, the top element, and the total capacity of the stack. 2. Continue Reading

Question: Reverse a linked list

Question: Given a singly linked list and a number K, you are required to complete the function modularNode() which returns the modular node of the linked list. A modular node Continue Reading

Question: You have to try to implement push and pop functionality of a stack using a linked list

Question: Write a function that returns the sun of the last N nodes of a linked list. For example. for the linked list 4->6->10->8->9->10->18->20, and Continue Reading

Question: Write a function isCircular() which checks whether a linked list is circular or not.

Question: Given a linked list, delete alternating nodes. For example is the linked list is 4->6->10->8->9->10->18->20, then the output should be 4->10->9->18.

Question: You are given a linked list where every node represents a linked list. All linked lists are sorted. You have to flatten the lists Continue Reading

Question: Write a function that inserts a node at the ith position of a linked list. Consider the position of the head as the 0th Continue Reading

Question: Find the middle of a linked list. For example, if the given linked list is 1->2->3->4->5 then the output should be 3. If there are Continue Reading

Question: Write a function that returns the length of the linked list. Throw an exception if the list is empty.

Question: Write a function that deletes the node passed as a parameter

Question: Write a function print() function to print the entire linked list. Throw an exception if the linked list of empty

Question: Write a function add(Listnode node) function to add a new node at the end of the linked list

Question: Create a class Listnode which has two private data fields: data (int type) and next (Listnode type). The class should have a constructor which Continue Reading

Question: Design a class named LinearEquation for a 2×2 system of linear equations: ax+by=e cx+dy=f x=(ed−bf)/(ad−bc) y=(af−ec)/(ad−bc)The class contains:o Private data fields a, b, c, Continue Reading

Question: Design a class named QuadraticEquation for a quadratic equation ax2+bx+c=0 . The classcontains:o Private data fields a, b, and c represents three coefficients.o A Continue Reading

Question: In an n-sided regular polygon, all sides have the same length and all angles have the same degree (i.e., thepolygon is both equilateral and Continue Reading

Question: Design a class named Fan to represent a fan. The class contains:o Three constants named SLOW , MEDIUM , and FAST with the values Continue Reading

Question: Design a class named Account that contains:o A private int data field named id for the account (default 0 ).o A private double data Continue Reading

Question: Design a class named StopWatch . The class contains:o Private data fields startTime and endTime with getter methods.o A no-arg constructor that initializes startTime Continue Reading

Question: Java API has the GregorianCalendar class in the java.util package, which you can use toobtain the year, month, and day of a date. The Continue Reading

Question: Write a program that creates a Random objectwith seed 1000 and displays the first 50 random integers between 0 and 100using the nextInt(100) method.

Question: Write a program that creates a Date object, sets itselapsed time to 10000 , 100000 , 1000000 , 10000000 , 100000000 ,1000000000 , 10000000000 Continue Reading

Question: Design a class named Stock that contains:o A string data field named symbol for the stock’s symbol.o A string data field named name for Continue Reading

Question: Design a class named Rectangle to represent a rectangle. The class contains:1. Two double data fields named width and height specify thewidth and height Continue Reading

Question: Create a class which keeps track of the number of its objects

Question: The arrays list1 and list2 are identical if they have the same contents.Write a method that returns true if list1 and list2 are identical, Continue Reading

Question: The arrays list1 and list2 are strictly identical if their corresponding elements are equal.Write a method that returns true if list1 and list2 are Continue Reading

Question: Write a program that generates two sequences of random int values which are identical. Use the java.util.Random class. OutputSeries 1:87 92 74 24 6 Continue Reading

Question: Create two Point2D object for a point with the specified x- and y- coordinates, use the distance method to compute the distance between the Continue Reading

Question: Create a class TV which defines for its objecs: states (channelNumber, volume, and power on or off)and behaviors (change channels (channelUp(), channelDown(), setChannel()), adjust Continue Reading

Question: Create a class Circle that has a data field radius. If no radius is passed during instantiation then set the radius to 1. Write Continue Reading

Question: Write a program that prompts the user to enter 10 integers and displays all combinations of picking two numbers from the 10 numbers. Sample Continue Reading

Question: Write a method for solving a quadratic equation using the following header:public static int solveQuadratic(double[] eqn, double[] roots)The coefficients of a quadratic equation ax2+bx+c=0 Continue Reading

Question: Coupon collector is a classic statistics problem with many practical applications. The problem is to repeatedly pick objects from a set of objects and Continue Reading

Question: A school has 100 lockers and 100 students. All lockers are closed on the first day of school. As the studentsenter, the first student, Continue Reading

Question: Write a program that passes a string to the command line and displays the number of uppercase letters in the string. Input from Command Continue Reading

Question: Write a program that passes an unspecified number of integers from the command line and displays their total. Sample input/output: args: [“1”, “2”, “3”, Continue Reading

Question: The selection-sort method repeatedly finds the smallest number in the current array and swaps it with the first.Rewrite this program by finding the largest Continue Reading

Question: Write the following method that returns true if the list is already sorted in non-decreasing order:public static boolean isSorted(int[] list)Write a test program that Continue Reading

Question: Write a sort method that uses the bubble-sort algorithm.The bubble-sort algorithm makes several passes through the array. On each pass, successive neighboring pairs are Continue Reading

Question: Write a program that prompts the user to enter the number of students, the student’s names, and theirscores and prints student names in decreasing Continue Reading

Question: Write a program that randomly generates an array of 100,000 integers and a key.Estimate the execution time of invoking the linearSearch method.Sort the array Continue Reading

Question: Write a method that returns a new array by eliminating the duplicate valuesin the array using the following method header:public static int[] eliminateDuplicates(int[] list)Write Continue Reading

Question: Write a method that returns the gcd of an unspecified number of integers. The method header is specified as follows:public static int gcd(int… numbers)Write Continue Reading

Question: Write a method that returns a random number between 1 and 54, excluding the numbers passed in the argument.The method header is specified as Continue Reading

Question: Write a program to reverse the elements in an integer array without copying it into a new array.Write a test program that prompts the Continue Reading

Question: Write a program that takes 10 elements as input for a double array and calculates the mean andstandard deviation of the elements.Mean= (n1+n2+n3+…+nl)/lStandard deviation= Continue Reading

Question: Write a method that returns the index of the smallest element in an array of integers. If the number of such elements is greater Continue Reading

Question: Write a method that finds the smallest element in an array of double values using the following header:public static double min(double[] array)Write a test Continue Reading

Question: Write two overloaded methods that return the average of an array with the following headers:public static int average(int[] array)public static double average(double[] array)Write a Continue Reading

Question: Write a program that generates 10 random integers between 0 and 9 and displays the count for each number. Example:3 4 4 5 0 Continue Reading

Question: Write a program that gives the first 50 prime numbers using the following approach: Check whether any of the prime numbers less than or Continue Reading

Question: Write a program that reads in 10 numbers and displays the number of distinct numbers and the distinct numbers in their input order and Continue Reading

Question: Write a program that reads an unspecified number of scores and determines how many scores are above or equal to the average, and how Continue Reading

Question: Write a program that generates random integers between 1 and 100 and counts the occurrences of each.

Question: Write a program that reads 10 integers then displays them in the reverse of the order in which they were read. Example: Enter array Continue Reading

Question: Write a program that reads student scores, gets the best score, and then assigns grades based on the following scheme: The grade is A Continue Reading

Question: Write a program that takes three arguments (num1 operation num2) from the command line and displays the result of the expression

package Array; /** * Created by aarushi on 1/5/21. */ public class ArraySortSelction { /* Selection sort selects the smallest number in the array and Continue Reading

package Array; /** * Created by aarushi on 1/5/21. */ public class ArraySearchBinary { /*Step 1: The array must be sorted Step 2: Assign the Continue Reading

package Array; /** * Created by aarushi on 1/5/21. */ public class ArrayLinearSearch { public static boolean linearSerach (int [] array, int key){ //In Linear Continue Reading

Question: Generate 10 random characters and store them in an array. Count and display the occurrence of each letter in the character array Example: Output Continue Reading

Question: Write a program to reverse an array Example: original array: {1,2,3,4,5} Output:5,4,3,2,1

Question: Use arraycopy method to contents of one array to another

Question: Write a program that will pick four random cards from a deck of cards Examples: Output 1: 9 of Hearts6 of Spade4 of Diamond2 Continue Reading

Question: Write a program that finds the average of contents in an array and counts the number of elements greater than the average

Q) Randomly shuffle the elements of an array Example Original Array: 2,5,1,7,8,2 Output 1:5 2 8 1 2 7 Output 2:5 1 8 2 2 Continue Reading

Q) Obtain the English name of a given month by its number Example: Input:Enter month number: 4 Output:April

Q) Shift elements of an array to the right Example: Array:1,2,3,4,5 Output:5 1 2 3 4

Q) Shifting elements of an array to the left Example: Array: 1,2,3,4,5 Output:2 3 4 5 1

Q) Find the lowest index of the largest element in an array Example: Array: 1,5,2,3,5,5 Output: Lowest Index of max element= 2

Q) Find the largest element in an array Example: Array: 33 93 29 40 36 81 46 14 60 24 Output:Max Element= 93

Q) Find the sum of all elements in an array Example: Array: 27 26 11 41 53 18 90 82 79 46 Output: Sum= 473

Q) Display the contents of an array

Q) Initialize an array with random values between 1 and 100 Example: First time running the program: 94 74 73 76 50 70 88 55 Continue Reading

Q) Initialize an array with input values from the user Example: Enter 10 elements of the array:1 2 3 4 5 6 7 8 9 Continue Reading