Java Programs for Interviews

Explore how a Java program from the course Java programs for interviews takes two numbers via scanner and computes the quotient and reminder.

Demonstrates a Java program to compute the circumference of a circle from a user radius using Math.PI and the 2*pi*radius formula, reading input with Scanner and printing the result.

Learn to build a Java program that computes a number's power from user input via scanner, using a copied base to avoid modification and multiply iteratively (5^3 = 125).

Write a Java program that uses a for loop to iterate from 1 to 100, accumulate each number into a sum variable, and print the resulting total.

Master a Java program that takes six numbers from the user via a scanner and calculates their average, with prompts and result display.

Demonstrates a Java program to sum all even numbers from 1 to 10 by iterating 1 to 10 and checking i % 2 == 0.

Learn how to read rectangle height and width from the user using a Java program with a scanner, then compute and print the rectangle area.

Explore a Java program that demonstrates swapping two numbers using a temporary variable, showing how values move from A to B and back, with print statements.

The video demonstrates a Java program that reads a rectangle's height and width from user input using Scanner, then computes and prints the rectangle's perimeter.

This lecture demonstrates a Java program that reads a number from the user, then uses modulo and division by ten in a loop to sum all its digits.

Demonstrates converting a numeric string to an integer in Java using Integer.parseInt and Integer.valueOf, and shows that non-numeric strings throw exceptions and numeric strings require conversion for arithmetic.

Learn to convert an integer to a string in Java using toString, assign it to a string variable, and perform string operations such as length and retrieving the first character.

Develop a Java program that reads a string via scanner, uses a hash map to count duplicate characters, and prints each character with its repetition count.

Learn to write a Java program that prints the counts of letters, digits, spaces, and other characters in a user-entered statement, by iterating over each character.

Java program to print the Fibonacci series up to a user-specified number using scanner input, starting from 1 and 1, with a stop condition.

Discover how to reverse a string in Java by converting it to a character array, iterating from the end with a for loop, and building the result without predefined methods.

Explore how to check whether a given string is a palindrome in Java by inputting text, reversing it, and comparing with the original.

Learn to write a Java program to check if a number is a palindrome by reversing the digits, using scanner input, and comparing with the original number.

Demonstrates a Java program that reads an integer from the user with a scanner, computes its square by multiplying the number by itself, and prints the result while closing scanner.

Demonstrates a Java program to find the cube of a given number by reading user input with a scanner, multiplying the number three times, and printing the result.

Discover how to implement a Java program that checks whether a given number is an Armstrong number by summing cubes of its digits and comparing to the original.

Learn how to compute a factorial in Java using a scanner for input and a static recursive factorial method that returns one for zero.

Learn how to remove duplicates from an array in Java using a HashSet to keep only unique values, then convert the set back to an array.

Learn to remove duplicates from a sorted array in Java by using an index to store unique elements, comparing adjacent values and printing the resulting array.

Learn to implement a Java program that finds duplicate elements in an array by index, comparing with others using nested loops and printing duplicates like 3 and 4.

Demonstrate how to find duplicate elements in an array using HashSet in Java, printing only the duplicates such as 3 and 4.

Count the digits in a user-entered number with a Java program that reads input via a scanner and uses a loop to divide by ten, printing the digit count.

learners will see a Java program to count digits of a user-entered number by iterating with a while loop, extracting digits via modulo 10, summing them, and printing the result.

Learn a practical Java program that counts the number of even digits and total digits in a user-provided number using a scanner, modulo checks, and a while loop.

Learn to write a Java program that reads three numbers from the user using a scanner and identifies the largest among them with a simple if-else sequence, printing the result.

Learn to compute the sum of all array elements in Java by initializing sum to zero and iterating with a for-each loop and printing the total.

Learn to write a Java program that separates even and odd numbers from an array using a for-each loop and modulo two, printing each group clearly.

demonstrates a Java program that reads a user input number using Scanner, reverses its digits with a while loop using modulus and division, and prints the reversed result.

Learn to generate a random number within a specified range in Java using the Math.random() method, scale the result to the desired range, and cast to integers.

Learn to compare two arrays in Java using the Arrays class and equals method to print whether they are equal, handling last element changes and different lengths.

Learn a plain Java approach to compare two arrays without built-in methods by checking sizes, comparing each element, and using a boolean status to determine equality.

Demonstrates a Java program to find the missing element in an array by subtracting the sum of the elements from the sum of 1 through n, using a for loop.

Learn how to write a Java program to find the maximum and minimum values in an array by initializing max and min and iterating through elements with a for loop.

Write a Java program that reads a number with Scanner, searches an array using a for loop, and prints index if found or not found otherwise; then closes the scanner.

Demonstrate how to print an array in Java by using the Arrays class to convert the array to a string and print it.

Learn how to sort array elements in Java using the built-in Arrays.parallelSort function, compare unsorted and sorted orders, and print results to demonstrate sorting behavior.

Learn to build a Java program that removes special characters and spaces from a string using replaceAll with a regex pattern, preserving only letters and digits.

Learn to remove all spaces from a string in Java using replaceAll with a regular expression or a direct space replacement, demonstrated through practical code examples.

Learn two Java methods to count a character's occurrences in a string: remove the character with replace and compare lengths, and iterate a character array with a counter.

Learn to reverse each word in a given string with a Java program by splitting the text on spaces and reversing characters in every word to produce the reversed output.

Demonstrate how to print the Java version installed on your machine using the system property.

Demonstrates a Java program that reads two numbers with scanner, compares them as greater than, less than, or equal using if and else, and closes the scanner.

Learn to write a Java program that finds the ASCII value of a given character. Read input with a scanner, cast the character to int, and print the result.

Demonstrates how to print text in a specific format with a single Java print statement using escape sequences, including newline and tab for precise output.

Learn to print the current system date and time in Java by instantiating a predefined Java class, obtaining Indian standard time in 24-hour format.

Demonstrate how to print date and time in a custom format in Java using SimpleDateFormat, creating a date object and applying a specified pattern to format output.

Learn to write a Java program that prints odd numbers from 1 to 10 using a loop and the modulo operator, printing 1, 3, 5, 7, and 9.

Learn to write a java program that reads an integer from the user using a scanner, then prints whether the number is even or odd by checking modulo two.

Practice a Java program that uses a for loop to display numbers from 1 to 25 divisible by both 2 and 3, printing 6, 12, 18, and 24.

a Java program reads seconds from the user and converts them into hours, minutes, and seconds using a scanner and division by 60 and modulo 60.

Learn to write a Java program that finds all factors of a user-entered number and counts how many factors exist, using a for loop and modulus checks.

This lecture shows a Java program to capitalize the first letter of every word in a given statement by reading user input with a Scanner and rebuilding the result.

Demonstrates a Java program that converts a user-entered string to lowercase using a scanner reading input from System.in. See how the string class lowers the entire input.

The lecture demonstrates a Java program that prints a pyramid pattern using nested loops to manage spaces and hash symbols, with careful per-row spacing and line breaks.

Learn how to implement a Java program that prints a number triangle pyramid using nested loops, handling zero-based indexing and spacing to form the pyramid shape.

Learn how to build a Java program that prints a five-row number pyramid with correct leading spaces and embedded numbers from zero to four.

Write a Java program using Scanner input to find the greatest common divisor of two given numbers by testing divisors and selecting the greatest common divisor.

Develop a Java program that reads a number from the user and computes its square root with Math.sqrt. Print the result and demonstrate basic input handling with scanner.

Convert a Java array to a list, reverse it with Collections.reverse, and print the reversed elements, using the proper wrapper class for integers.

Demonstrates how to read the size from the user, create an int array accordingly, and fill it with input values using a scanner, then print the resulting array.

Demonstrates a Java program to reverse an array by swapping the first and last elements and moving inward toward the middle, with a worked example.

Reverse the position of words in a string using Collections.reverse by splitting the string into words, converting to a list, and printing the reversed output.

Demonstrates a Java program that finds the penultimate word in a sentence using a scanner, splits input on spaces, and prints the last-but-one word, with edge-case handling.

Learn how to calculate the remainder of two numbers without the modulus operator in a Java program by dividing to obtain a dividend and subtracting the dividend times the divisor.

Learn how to write a Java program to insert a word in the middle of a given text, using index and substring operations to place new words between existing words.

Demonstrates a Java program that prints the last three letters of user input by using a scanner, indexing, and string handling for clear, practical interview preparation.

Demonstrates reading a string with a scanner and printing its first half using substring and the half index, as in Flipkart.

Learn how to build a Java program that reads user input with a scanner and prints the size or length of a given string, such as Flipkart.

The video teaches how to find the number of elements in a given array using a predefined variable, starting with seven elements and printing 7, then 10 after adding three.

Learn to create an ArrayList of integers, add elements, and use the size() method to determine how many elements are in the list (six in the example).

Rotate a Java array to the right by one by storing the last element, shifting others to the right, and placing the last element at the front.

Learn how to implement a Java program that right rotates an array by three positions, including step-by-step logic to move each element and produce the rotated output.

Learn how to implement a Java program that left rotates an array by one element, using a temporary variable to hold the first element.

Learn how to left rotate a Java array by three elements, starting from a one-element rotation, saving the first element, looping through indices, and printing the updated array.

Learn how to swap the first and last elements of an array in Java using a temporary variable and array length to identify indices.

This Java lecture demonstrates multiplying corresponding elements of two equal-length arrays and storing results in a new array, using a simple index-based loop and clear example runs.

Merge two sorted arrays into a single sorted array in Java using a two-pointer approach, with an example yielding 1,2,2,3,4,6,8.

Build a Java calculator that reads two numbers and an operator, performs addition, subtraction, multiplication, and division, and handles invalid operators with a status check.

Learn to build a Java program that takes a website URL from the user, uses a scanner to read input, and prints the IP address, with basic error handling.

Learn how to implement a Java program that checks if a user input number is prime by testing divisibility from two to n-1 and reporting true or false.

Demonstrates a Java program to print all prime numbers between 1 and 100 by checking each number greater than one for non-divisibility from two onward and printing primes.

Learn how to count words in a Java string by reading user input with Scanner, splitting the text on spaces, and computing the word count.

Shows a Java program to find the first occurrence of a given element in an array by scanning from the start and breaking after the first match.

The video demonstrates swapping two numbers in Java without a third variable, using A = A + B, B = A - B, and A = A - B.

Learn how to remove duplicate characters from a string in Java by collecting unique chars in a set and building the result with a string buffer.