Prepared By: Uday Shah
Ruparel Education Pvt. Ltd – (HOD-IT)
Asst. Prof.,
Faculty of Computer Applications,
Nobile University
Some Important Java and Python
Programs
Java
Program: Banking Application with Exception Handling
Java
Program: Student Class with Static Count
Java
Program: Prime Numbers Between Start and End
Java
Program: Palindrome Number
Java
Program: Sort Array in Ascending Order
Python
Program: Prime Numbers Between Start and End
3.
Python Program: Palindrome Number
Python
Program: Sort Array in Ascending Order
Java Program (Armstrong)
import
java.util.Scanner;
public class
ArmstrongNumber
{
public
static void main(String[] args)
{
Scanner
sc = new Scanner(System.in);
System.out.print("Enter
a number: ");
int
num = sc.nextInt();
int
original = num;
int
result = 0;
int
digits = String.valueOf(num).length();
while
(num != 0)
{
int
rem = num % 10;
result
+= Math.pow(rem, digits);
num
/= 10;
}
if
(result == original)
{
System.out.println("Armstrong
Number");
}
else
{
System.out.println("Not
Armstrong Number");
}
}
}
Python Program (Armstrong)
num =
int(input("Enter a number: "))
original = num
result = 0
digits =
len(str(num))
while num != 0:
rem = num % 10
result += rem ** digits
num //= 10
if result ==
original:
print("Armstrong Number")
else:
print("Not Armstrong Number")
2. Palindrome Number Program
Definition:
A palindrome number is a number that reads the same forward and backward.
Example: 121, 1331
Java Program (Palindrome)
import
java.util.Scanner;
public class
PalindromeNumber
{
public
static void main(String[] args)
{
Scanner
sc = new Scanner(System.in);
System.out.print("Enter
a number: ");
int
num = sc.nextInt();
int
original = num;
int
reverse = 0;
while
(num != 0)
{
int
rem = num % 10;
reverse
= reverse * 10 + rem;
num
/= 10;
}
if
(original == reverse)
{
System.out.println("Palindrome
Number");
}
else
{
System.out.println("Not
Palindrome Number");
}
}
}
Python Program (Palindrome)
num =
int(input("Enter a number: "))
original = num
reverse = 0
while num != 0:
rem = num % 10
reverse = reverse * 10 + rem
num //= 10
if original ==
reverse:
print("Palindrome Number")
else:
print("Not Palindrome Number")
# Python program to perform insertion, deletion, searching,
and traversal on Python List (used as Dynamic Array)
# Create an
empty list
arr = []
# Insertion
arr.append(10)
arr.append(20)
arr.append(30)
arr.insert(1,
15) # Insert 15 at index 1
print("List
after insertion:", arr)
# Deletion
arr.remove(20) # Remove value 20
del arr[0] # Delete element at index 0
print("List
after deletion:", arr)
# Searching
key = 30
if key in arr:
print(key, "found at index",
arr.index(key))
else:
print(key, "not found")
# Traversal
print("Traversing
list elements:")
for item in
arr:
print(item)
# Python
program to evaluate postfix expression using stack
def
evaluate_postfix(expression):
stack = []
for ch in expression.split():
if ch.isdigit(): # If operand, push into stack
stack.append(int(ch))
else:
val2 = stack.pop()
val1 = stack.pop()
if ch == '+':
stack.append(val1 + val2)
elif ch == '-':
stack.append(val1 - val2)
elif ch == '*':
stack.append(val1 * val2)
elif ch == '/':
stack.append(val1 / val2)
elif ch == '%':
stack.append(val1 % val2)
return stack.pop()
# Input postfix
expression
exp = "5 3
+ 2 * 4 /"
result =
evaluate_postfix(exp)
print("Postfix
Expression :", exp)
print("Result
=", result)
Java Program: Banking Application with Exception
Handling
// Custom
Exception Class
class
InsufficientFundException extends Exception
{
public
InsufficientFundException(String message)
{
super(message);
}
}
// Bank Class
class
BankAccount
{
double
balance;
//
Constructor
BankAccount(double
balance)
{
this.balance
= balance;
}
//
Deposit Method
void
deposit(double amount)
{
balance
+= amount;
System.out.println("Deposited:
Rs " + amount);
System.out.println("Current
Balance: Rs " + balance);
}
//
Withdraw Method
void
withdraw(double amount) throws InsufficientFundException
{
if (amount > balance)
{
throw
new InsufficientFundException("Not Sufficient Fund");
}
else
{
balance -= amount;
System.out.println("Withdrawn:
Rs " + amount);
System.out.println("Remaining
Balance: Rs " + balance);
}
}
}
// Main Class
public class
BankingApp
{
public
static void main(String[] args)
{
BankAccount
account = new BankAccount(0);
try
{
//
Deposit Rs 1000
account.deposit(1000);
//
Withdraw Rs 400
account.withdraw(400);
//
Withdraw Rs 300
account.withdraw(300);
//
Withdraw Rs 500 (should throw exception)
account.withdraw(500);
}
catch (InsufficientFundException e)
{
System.out.println("Exception:
" + e.getMessage());
}
}
}
Output
Example
Deposited: Rs
1000
Current
Balance: Rs 1000
Withdrawn: Rs
400
Remaining
Balance: Rs 600
Withdrawn: Rs
300
Remaining
Balance: Rs 300
Exception: Not
Sufficient Fund
Java Program: Student Class with Static Count
// Student
Class
class Student
{
//
Instance variables
int
enrollmentNo;
String
name;
String
gender;
double
marks;
//
Static variable to count objects
static
int count = 0;
//
Constructor
Student(int
enrollmentNo, String name, String gender, double marks)
{
this.enrollmentNo
= enrollmentNo;
this.name
= name;
this.gender
= gender;
this.marks
= marks;
count++; // Increment count when object is created
}
//
Display method
void
display()
{
System.out.println("Enrollment
No: " + enrollmentNo);
System.out.println("Name:
" + name);
System.out.println("Gender:
" + gender);
System.out.println("Marks:
" + marks);
System.out.println("---------------------------");
}
}
// Main Class
public class
StudentDemo
{
public
static void main(String[] args)
{
//
Creating objects
Student
s1 = new Student(101, "Uday", "Male", 85.5);
Student
s2 = new Student(102, "Riya", "Female", 90.0);
Student
s3 = new Student(103, "Amit", "Male", 78.0);
//
Display student details
s1.display();
s2.display();
s3.display();
//
Display total count of objects
System.out.println("Total
Students: " + Student.count);
}
}
Output
Example
Enrollment No:
101
Name: Uday
Gender: Male
Marks: 85.5
---------------------------
Enrollment No:
102
Name: Riya
Gender: Female
Marks: 90.0
---------------------------
Enrollment No:
103
Name: Amit
Gender: Male
Marks: 78.0
---------------------------
Total Students:
3
Java Program: Prime Numbers Between Start and End
import
java.util.Scanner;
public class
PrimeRange
{
public
static void main(String[] args)
{
Scanner
sc = new Scanner(System.in);
System.out.print("Enter
start number: ");
int
start = sc.nextInt();
System.out.print("Enter
end number: ");
int
end = sc.nextInt();
System.out.println("Prime
numbers are:");
for
(int i = start; i <= end; i++)
{
if
(i < 2) continue;
boolean
isPrime = true;
for
(int j = 2; j <= Math.sqrt(i); j++)
{
if (i % j == 0)
{
isPrime
= false;
break;
}
}
if
(isPrime)
{
System.out.print(i + "
");
}
}
}
}
Java Program: Palindrome Number
import
java.util.Scanner;
public class
PalindromeNumber
{
public
static void main(String[] args)
{
Scanner
sc = new Scanner(System.in);
System.out.print("Enter
a number: ");
int
num = sc.nextInt();
int
original = num;
int
reverse = 0;
while
(num != 0)
{
int digit = num % 10;
reverse
= reverse * 10 + digit;
num = num / 10;
}
if (original == reverse)
{
System.out.println("Palindrome
Number");
}
else
{
System.out.println("Not a
Palindrome Number");
}
}
}
Java Program: Sort Array in Ascending Order
import
java.util.Scanner;
public class
SortArray
{
public
static void main(String[] args)
{
Scanner
sc = new Scanner(System.in);
System.out.print("Enter
number of elements: ");
int
n = sc.nextInt();
int arr[] = new int[n];
System.out.println("Enter
elements:");
for
(int i = 0; i < n; i++)
{
arr[i]
= sc.nextInt();
}
//
Sorting (Bubble Sort)
for (int i = 0; i < n - 1; i++)
{
for
(int j = 0; j < n - i - 1; j++)
{
if (arr[j] > arr[j + 1])
{
// Swap
int temp = arr[j];
arr[j] = arr[j + 1];
arr[j + 1] = temp;
}
}
}
System.out.println("Sorted
Array:");
for
(int i = 0; i < n; i++)
{
System.out.print(arr[i]
+ " ");
}
}
}
Python Program: Prime Numbers Between Start and End
start =
int(input("Enter start number: "))
end =
int(input("Enter end number: "))
print("Prime
numbers are:")
for i in
range(start, end + 1):
if i < 2:
continue
is_prime = True
for j in range(2, int(i ** 0.5) + 1):
if i % j == 0:
is_prime = False
break
if is_prime:
print(i, end=" ")
3. Python Program: Palindrome Number
num =
int(input("Enter a number: "))
original = num
reverse = 0
while num != 0:
digit = num % 10
reverse = reverse * 10 + digit
num = num // 10
if original ==
reverse:
print("Palindrome Number")
else:
print("Not a Palindrome Number")
Python Program: Sort Array in Ascending Order
n =
int(input("Enter number of elements: "))
arr = []
print("Enter
elements:")
for i in
range(n):
arr.append(int(input()))
# Bubble Sort
for i in
range(n - 1):
for j in range(n - i - 1):
if arr[j] > arr[j + 1]:
arr[j], arr[j + 1] = arr[j + 1],
arr[j]
print("Sorted
Array:")
for i in arr:
print(i, end=" ")
