Practice 70 Java Nested Classes Programming Questions

Practice 70 Java Nested Classes Programming Questions

 Q1. Write a Java program to create a simple static nested class.
   Expected Output:  
   Static nested class example

Q2. Write a Java program to demonstrate the use of an inner class within a method.
   Expected Output:  
   Inner class example inside method

Q3. Write a Java program to create an instance of a non-static nested class from the outer class.
   Expected Output:  
   Non-static nested class instance created

Q4. Write a Java program to demonstrate the use of a nested class accessing outer class members.
   Expected Output:  
   Outer class member accessed by nested class

Q5. Write a Java program that shows how a nested class can be used to implement a simple calculator.
   Input:  
   Add 2 and 3

   Expected Output:     
   Result: 5

Q6. Write a Java program to create a nested class that calculates the square of a number.
   Input:  
   Number: 4

   Expected Output:      
   Square: 16
  
Q7. Write a Java program to demonstrate an anonymous inner class that implements an interface.
   Expected Output:  
   Anonymous inner class example

Q8. Write a Java program to use a nested class to reverse a string.
   Input:  
   String: Java

   Expected Output:      
   Reversed string: avaJ

Q9. Write a Java program that uses a nested class to calculate the factorial of a number.
   Input:  
   Number: 5

   Expected Output:      
   Factorial: 120

Q10. Write a Java program to demonstrate how an outer class can invoke the method of its nested class.
   Expected Output:  
   Nested class method called from outer class

Q11. Write a Java program to demonstrate a nested class to print Fibonacci series.
   Input:  
   Limit: 6

   Expected Output:      
   Fibonacci series: 0 1 1 2 3 5

Q12. Write a Java program to create a nested class that calculates the power of a number.
   Input:  
   Base: 2, Exponent: 3

   Expected Output:      
   Power: 8

Q13. Write a Java program to demonstrate a nested class that adds two matrices.
   Input:  
   Matrix 1: [[1, 2], [3, 4]]
   Matrix 2: [[5, 6], [7, 8]]

   Expected Output:      
   Resultant Matrix: [[6, 8], [10, 12]]

Q14. Write a Java program to use a nested class for sorting an array.
   Input:  
   Array: [4, 2, 5, 1, 3]

   Expected Output:      
   Sorted Array: [1, 2, 3, 4, 5]

Q15. Write a Java program to demonstrate a nested class for calculating the area of a circle.
   Input:  
   Radius: 5

   Expected Output:      
   Area of circle: 78.54

Q16. Write a Java program to demonstrate how an inner class can inherit from the outer class.
   Expected Output:  
   Inner class inherited successfully

Q17. Write a Java program to use a nested class to check whether a number is prime.
   Input:  
   Number: 7

   Expected Output:      
   7 is prime

Q18. Write a Java program to create a nested class to find the maximum element in an array.
   Input:  
   Array: [3, 7, 2, 9, 4]

   Expected Output:      
   Maximum element: 9

Q19. Write a Java program to use a nested class for string manipulation.
   Input:  
   String: hello

   Expected Output:      
   String in uppercase: HELLO

Q20. Write a Java program to create a nested class that checks if a string is a palindrome.
   Input:  
   String: madam

   Expected Output:      
   madam is a palindrome

Q21. Write a Java program to demonstrate the use of static nested class to store student information.
   Input:  
   Name: John, Age: 20

   Expected Output:      
   Student: John, Age: 20

Q22. Write a Java program to use a nested class to calculate the sum of an array.
   Input:  
   Array: [1, 2, 3, 4]

   Expected Output:      
   Sum: 10

Q23. Write a Java program to create a nested class to reverse the digits of an integer.
   Input:  
   Number: 12345

   Expected Output:      
   Reversed number: 54321

Q24. Write a Java program to use an inner class for handling exceptions.
   Expected Output:  
   Exception handled in inner class

Q25. Write a Java program to create a nested class to print the multiplication table of a number.
   Input:  
   Number: 5

   Expected Output:      
   Multiplication table of 5: 5 10 15 20 25

Q26. Write a Java program to create a nested class for finding the GCD of two numbers.
   Input:  
   Number 1: 12, Number 2: 15

   Expected Output:      
   GCD: 3

Q27. Write a Java program to use a nested class for checking whether a number is Armstrong.
   Input:  
   Number: 153

   Expected Output:      
   153 is an Armstrong number

Q28. Write a Java program to create a nested class that performs binary to decimal conversion.
   Input:  
   Binary: 1011

   Expected Output:      
   Decimal: 11

Q29. Write a Java program to demonstrate a nested class to calculate the LCM of two numbers.
   Input:  
   Number 1: 4, Number 2: 6

   Expected Output:      
   LCM: 12

Q30. Write a Java program to create a nested class for swapping two numbers.
   Input:  
   Number 1: 10, Number 2: 20

   Expected Output:      
   Swapped numbers: 20 10

Q31. Write a Java program to use a nested class to find the even numbers in an array.
   Input:  
   Array: [1, 2, 3, 4, 5]

   Expected Output:      
   Even numbers: 2, 4

Q32. Write a Java program to demonstrate a nested class to calculate the perimeter of a rectangle.
   Input:  
   Length: 5, Width: 3

   Expected Output:      
   Perimeter of rectangle: 16

Q33. Write a Java program to create a nested class that checks whether a year is a leap year.
   Input:  
   Year: 2024

   Expected Output:      
   2024 is a leap year

Q34. Write a Java program to use a nested class to find the sum of squares of an array of integers.
   Input:     
   Array: [1, 2, 3]

   Expected Output:  
   Sum of squares: 14

Q35. Write a Java program to demonstrate the use of nested class to find the sum of digits of a number.
   Input:  
   Number: 123

   Expected Output:      
   Sum of digits: 6

Q36. Write a Java program to create a nested class that calculates the area of a rectangle.
   Input:  
   Length: 5, Width: 3

   Expected Output:      
   Area of rectangle: 15

Q37. Write a Java program to use a nested class to print the powers of 2 up to a given limit.
   Input:  
   Limit: 10

   Expected Output:      
   Powers of 2: 1 2 4 8

Q38. Write a Java program to create a nested class to check if a number is a perfect number.
   Input:  
   Number: 6

   Expected Output:      
   6 is a perfect number

Q39. Write a Java program to use a nested class to sort an array of strings alphabetically.
   Input:  
   Array: ["apple", "banana", "orange"]

   Expected Output:      
   Sorted Array: [apple, banana, orange]

Q40. Write a Java program to create a nested class that computes the average of an array of integers.
   Input:  
   Array: [2, 4, 6, 8]

   Expected Output:      
   Average: 5.0

Q41. Write a Java program to use a nested class to calculate the length of the hypotenuse in a right triangle.
   Input:  
   Side A: 3, Side B: 4

   Expected Output:      
   Hypotenuse: 5

Q42. Write a Java program to create a nested class to count the occurrences of each character in a string.
   Input:  
   String: hello

   Expected Output:  
   Occurrences: h: 1, e: 1, l: 2, o: 1

Q43. Write a Java program to use a nested class to determine the number of vowels in a string.
   Input:  
   String: java programming

   Expected Output:      
   Vowels count: 5

Q44. Write a Java program to create a nested class that checks if a number is an automorphic number.
   Input:  
   Number: 25

   Expected Output:  
   25 is an automorphic number

Q45. Write a Java program to use a nested class to check if a string is an anagram of another string.
   Input:  
   String 1: listen, String 2: silent

   Expected Output:      
   The strings are anagrams

Q46. Write a Java program to create a nested class to find the sum of the digits of a number.
   Input:  
   Number: 145

   Expected Output:      
   Sum of digits: 10

Q47. Write a Java program to use a nested class to print the multiplication table of a number.
   Input:  
   Number: 3

   Expected Output:      
   3 6 9 12 15

Q48. Write a Java program to create a nested class that checks if a string is a substring of another string.
   Input:  
   String 1: Java programming, String 2: prog

   Expected Output:      
   prog is a substring

Q49. Write a Java program to use a nested class to reverse an array.
   Input:  
   Array: [1, 2, 3]

   Expected Output:      
   Reversed Array: [3, 2, 1]

Q50. Write a Java program to create a nested class to find the largest number in a list.
   Input:  
   List: [2, 5, 8, 3, 1]

   Expected Output:      
   Largest number: 8

Q51. Write a Java program to demonstrate the use of an inner class for calculating the square root of a number.
   Input:  
   Number: 16

   Expected Output:      
   Square root: 4.0

Q52. Write a Java program to create a nested class for calculating the volume of a cylinder.
   Input:  
   Radius: 3, Height: 5

   Expected Output:      
   Volume of cylinder: 141.37

Q53. Write a Java program to use a nested class to determine if a number is a palindrome.
   Input:  
   Number: 121

   Expected Output:      
   121 is a palindrome

Q54. Write a Java program to create a nested class for calculating the area of a triangle.
   Input:  
   Base: 4, Height: 6

   Expected Output:      
   Area of triangle: 12

Q55. Write a Java program to use a nested class to print the even numbers in a list.
   Input:  
   List: [1, 2, 3, 4, 5]

   Expected Output:      
   Even numbers: 2, 4

Q56. Write a Java program to demonstrate how nested classes can help manage a simple employee list.
   Input:  
   Employee 1: John, Age: 30
   Employee 2: Jane, Age: 25

   Expected Output:      
   Employee list:
   John, 30
   Jane, 25

Q57. Write a Java program to create a nested class to check if a number is divisible by 3 and 5.
   Input:  
   Number: 15

   Expected Output:      
   15 is divisible by both 3 and 5

Q58. Write a Java program to use a nested class to calculate the sum of an arithmetic series.
   Input:  
   First term: 1, Common difference: 2, Number of terms: 5

   Expected Output:      
   Sum of series: 25

Q59. Write a Java program to create a nested class for calculating the sum of odd numbers in a list.
   Input:  
   List: [1, 2, 3, 4, 5]

   Expected Output:      
   Sum of odd numbers: 9

Q60. Write a Java program to use a nested class for converting a string to lowercase.
   Input:  
   String: HELLO

   Expected Output:      
   Lowercase string: hello

Q61. Write a Java program to demonstrate the use of a nested class for checking if a number is divisible by a given divisor.
   Input:  
   Number: 20, Divisor: 4

   Expected Output:      
   20 is divisible by 4

Q62. Write a Java program to create a nested class for checking if a string contains only alphabets.
   Input:  
   String: Hello

   Expected Output:      
   String contains only alphabets

Q63. Write a Java program to use a nested class to find the median of an array.
   Input:  
   Array: [1, 3, 2, 5, 4]

   Expected Output:      
   Median: 3

Q64. Write a Java program to create a nested class to convert a decimal number to binary.
   Input:  
   Number: 10

   Expected Output:      
   Binary: 1010

Q65. Write a Java program to use a nested class to calculate the area of a square.
   Input:  
   Side length: 4

   Expected Output:      
   Area of square: 16

Q66. Write a Java program to create a nested class for finding the sum of cubes of numbers in a range.
   Input:  
   Range: 1 to 3

   Expected Output:      
   Sum of cubes: 36

Q67. Write a Java program to use a nested class to check if a string contains a digit.
   Input:  
   String: java123

   Expected Output:      
   String contains a digit

Q68. Write a Java program to create a nested class for sorting a list of integers.
   Input:  
   List: [10, 5, 3, 8]

   Expected Output:      
   Sorted list: [3, 5, 8, 10]

Q69. Write a Java program to use a nested class to calculate the greatest common divisor (GCD) of two numbers.
   Input:  
   Number 1: 14, Number 2: 21

   Expected Output:      
   GCD: 7

Q70. Write a Java program to create a nested class to find the minimum number in a list.
   Input:  
   List: [10, 4, 6, 2]

   Expected Output:      
   Minimum number: 2