Java Programs

This repository contains a collection of Java coding practice problems covering basic to advanced concepts.

Introduction

This repository serves as a resource for individuals looking to improve their Java programming skills. It includes a variety of Java programs and coding exercises that cover a wide range of concepts, from basic syntax to more advanced topics. Whether you are a beginner looking to learn Java or an experienced programmer seeking to sharpen your skills, you'll find something here to challenge and enhance your Java knowledge.

Java-Programs-List

Java Basic Programs List

S.No	Program
1	Write a Java program to print ‘Hello World!’ on screen
2	Write a Java program to print the sum of two numbers
3	Write a Java program that takes two numbers and display the product of two numbers
4	Write a Java program to print the sum, multiply, subtract, divide and remainder of two numbers
5	Write a Java program that takes five numbers as input to calculate and print the average of the numbers
6	Write a Java program to swap two variables
7	Write a Java program to convert a decimal number to binary numbers
8	Write a Java program to convert a binary number to decimal number
9	Write a Java program to check whether Java is installed on your computer or not
10	Write a Java program and compute the sum of the digits of an integer
11	Write a Java program to compare two numbers
12	Write a Java program to count the letters, spaces, numbers and other characters of an input string
13	Write a Java program to print the ascii value of a given character
14	Write a Java program that accepts an integer (n) and computes the value of n+nn+nnn
15	Write a Java program to display the system time
16	Write a Java program to print the odd numbers from 1 to 20
17	Write a Java program to print the even numbers from 1 to 20
18	Write a Java program to convert a string to an integer
19	Write a Java program to convert seconds to hour, minute and seconds
20	Write a Java program to compute the sum of the first 100 prime numbers
21	Write a Java program to swap the first and last elements of an array and create a new array
22	Write a Java program to count the number of even and odd elements in a given array
23	Write a Java program to compute the square root of an given integer
24	Write a Java program to check if a positive number is a palindrome or not
25	Write a Java program to add two numbers without using any arithmetic operators
26	Write a Java program to add all the digits of a given positive integer
27	Java program to find area of circle
28	Java Program to find area of rectangle
29	Java Program to find area of triangle
30	Java Program to find area of equilateral triangle
31	Java Program to find area of rhombus
32	Java Program to find area of parallelogram
33	Java Program to find area of Prism
34	Java Program to find volume of sphere
35	Java Program to find volume of cylinder
36	Java Program to find volume of cuboid
37	Java Program to find volume of cone
38	Java program to find surface area of cuboid
39	Java program to find surface area of cylinder
40	Java program to find surface area of cube
41	Java program to calculate average marks
42	Java program to check vowel or consonant
43	Java program to sum of N numbers
44	Java program to find factorial of any number
45	Java Program to calculate electricity bill
46	Java Program To Calculate CGPA Percentage
47	Java Program to calculate compound interest
48	Java Program To Calculate Batting Average
49	Java Pogram to Calculate Commission Percentage
50	Java Pogram To Find Distance Between Two Points
51	Java Program To Calculate Power Of Number
52	Write a Java program to take three numbers from the user and print the greatest number
53	Write a Java program to find the number of days in a month
54	Write a Java program to test a number is positive or negative
55	Write a Java Program to accept number of week’s day (1-7) and print name of the day
56	Write a Java program that takes a year from user and print whether that year is a leap year or not
57	Write a Java program to input 5 numbers from keyboard and find their sum and average
58	Write a program in Java to display the first 5 natural numbers
59	Write a java program to check vowel or consonant
60	Write a java program to check vowel or consonant
61	Write a Java program to display the n terms of odd natural number and their sum
62	Write a Java program to display the multiplication table of a given integer
63	Write a Java program that reads an integer and check whether it is negative, zero, or positive
64	Write a Java program that reads an integer and check whether it is negative, zero, or positive
65	Write a Java program that accepts three numbers and check All numbers are equal or not
66	Write a java program that accepts three numbers from the user and check if numbers are in “increasing” or “decreasing” order.
67	Write a Java program that determines a student’s grade
68	Write a Java program to create a simple calculator
69	Write a Java program to concatenate two string
70	Write a Java program to convert all characters in a string to lowercase
71	Write a Java program to convert all characters in a string to uppercase
72	Write a Java program to trim a string(remove whitespaces)
73	Write a Java program to get a substring of a given string between two specified positions
74	Write a Java program to replace all the ‘d’ characters with ‘f’ characters
75	Write a Java program to replace all the ‘d’ characters with ‘f’ characters
76	Write a java program to print current date and time in the specified format
77	Write a java program to print current date and time in the specified format
78	Write a java program to remove a particular character from a string
79	Write a java program to remove a particular character from a string
80	Write a java program to remove html tags from a string
81	Write a java program to remove html tags from a string
82	Write a java program to remove html tags from a string
83	Write a Java program to find the index of an array element
84	Write a Java program to find the index of an array element
85	Write a Java program to test if an array contains a specific value
86	Write a Java program to find the maximum and minimum value of an array
87	Write a Java program to insert an element (specific position) into an array
88	Write a Java program to reverse an array of integer values
89	Write a Java program to find the common elements between two arrays
90	Write a Java program to find the duplicate values of an array of integer values
91	Write a Java program to convert an array to ArrayList
92	Write a Java program to add two matrices of the same size
93	Write a Java program to find second largest number from the array
94	Write a Java program to find second lowest number from the array
95	Write a Java program to find the number of even and odd integers in a given array of integers
96	Write a Java program to get the difference between the largest and smallest values in an array of integers
97	Write a Java program to segregate all 0s on left side and all 1s on right side of a given array of 0s and 1s
98	Write a Java program to cyclically rotate a given array clockwise by one
99	java program to print all unique element in an array
100	Write a Java Program to Sort the Array in an Ascending Order
101	Write a Java Program to Sort the Array in an Descending Order
102	Write a Java Program to Sort Names in an Alphabetical Order
103	Write a Java Program to Display Transpose Matrix
104	Write a Java Program to Search Key Elements in an Array
105	Write a Java Program to Accept the Marks of a Student and find Total Marks and Percentage
106	Write a java program to print numbers from 1 to 10 using loop
107	Write a java program to calculate the sum of first 10 natural number using loop
108	Write a Java program to print multiplication table of given number
109	Write a Java program to find the factorial value of any number entered through the keyboard
110	Write a Java program that prompts the user to input an integer and then outputs the number with the digits reversed order
111	Write a Java program that reads a set of integers, and then prints the sum of the even and odd integers using loop
112	Write a Java program that reads a set of integers, and then prints the sum of the even and odd integers using loop
113	Write a Java program to calculate HCF of Two given numbers using loop
114	Write a Java program to enter the numbers till the user wants and at the end it should display the count of positive, negative and zeros
115	Write a Java program to enter the numbers till the user wants and at the end the program should display the largest and smallest numbers entered
116	Write a Java program to print out all Armstrong numbers between 1 to 600 using loop
117	Write a java program to count total number of notes in entered amount using loop
118	Write a Java program to print Fibonacci series of n terms where n is input by user using loop
119	Write a java program to calculate the sum of following series where n is input by user
120	Write a Java method to compute the average of three numbers
121	Write a Java method to find the smallest number among three numbers
122	Write a Java method to count all words in a string
123	Write a Java method to count all vowels in a string
124	Write a Java method to compute the sum of the digits in an integer
125	Write a Java method to check whether an year entered by the user is a leap year or not
126	Write a Java method to calculate the area of a triangle
127	Write a Java method to find the area of a pentagon
128	Write a Java method to find number is even number or not
129	Write a Java method to check numbers is palindrome number or not
130	Write a Java method to displays prime numbers between 1 to 20
131	Write a Java method to find GCD and LCM of Two Numbers
132	Write a Java method to find factorial using recursion in java
133	Write a Java program to reverse an integer number
134	Write a Java program to round a float number to specified decimals
135	Write a Java program to round a float number to specified decimals
136	Write a Java program to round up the result of integer division
137	Write a Java program to convert Roman number to an integer number
138	Write a Java program to convert a float value to absolute value
139	Write a Java program to accept a float value of number and return a rounded float value

Data Conversion

S.No	Program
140	How to convert String to int
141	How to convert int to String
142	How to convert String to long
143	How to convert long to String
144	How to convert Decimal to Hex
145	How to convert String to float
146	How to convert float to String
147	How to convert String to double
148	How to convert double to String
149	How to convert String to Date
150	How to convert Date to String
151	How to convert String to char
152	How to convert char to String
153	How to convert String to Object
154	How to convert Object to String
155	How to convert int to long
156	How to convert long to int
157	How to convert int to double
158	How to convert double to int
159	How to convert Octal to Decimal
160	How to convert char to int
161	How to convert int to char
162	How to convert String to boolean
163	How to convert boolean to String
164	How to convert Date to Timestamp
165	How to convert Timestamp to Date
166	How to convert Binary to Decimal
167	How to convert Decimal to Octal
168	How to convert Decimal to Binary
169	How to convert Hex to Decimal

Functions

S.No	Program
170	Write a Java method to find the smallest number among three numbers.
171	Write a Java method to compute the average of three numbers.
172	Write a Java method to display the middle character of a string. Note: a) If the length of the string is odd there will be two middle characters. b) If the length of the string is even there will be one middle character.
173	Write a Java method to count all the words in a string.
174	Write a Java method to compute the future investment value at a given interest rate for a specified number of years.
175	Write a Java method to print characters between two characters (i.e. A to P).
176	Write a Java method to check whether a string is a valid password.
177	Write a Java method to display the current date and time.
178	Write a Java method to find all twin prime numbers less than 100.
179	Write a Java method to count the number of digits in an integer with the value 2. The integer may be assumed to be non-negative.
180	Write a Java method that accepts three integers and checks whether they are consecutive or not. Returns true or false.
181	Write a Java method that accepts three integers and returns true if one is the middle point between the other two integers, otherwise false.
182	Write a Java method that checks whether all the characters in a given string are vowels (a, e,i,o,u) or not. Return true if each character in the string is a vowel, otherwise return false.

Single Dimension Arrays

S.No	Program
183	Program to copy all elements of one array into another array
184	Program to find the frequency of each element in the array
185	Program to left rotate the elements of an array
186	Program to print the duplicate elements of an array
187	Program to print the elements of an array
188	Program to print the elements of an array in reverse order
189	Program to print the elements of an array present on even position
190	Program to print the elements of an array present on odd position
191	Program to print the largest element in an array
192	Program to print the smallest element in an array
193	Program to print the number of elements present in an array
194	Program to print the sum of all the items of the array
195	Program to right rotate the elements of an array
196	Program to sort the elements of an array in ascending order
197	Program to sort the elements of an array in descending order
198	Program to Find 3rd Largest Number in an array
199	Program to Find 2nd Largest Number in an array
200	Program to Find Largest Number in an array
201	to Program Find 2nd Smallest Number in an array
202	Program to Find Smallest Number in an array
203	Program to Remove Duplicate Element in an array
204	Program to Print Odd and Even Numbers from an array
205	How to Sort an Array in Java

2D Array

S.No	Program
206	Enter the Matrix of rows and columns entered by the user and print in matrix format
207	Program to Add Two Matrices
208	Program to Multiply Two Matrices
209	Program to subtract the two matrices
210	Program to determine whether two matrices are equal
211	Program to display the lower triangular matrix
212	Program to display the upper triangular matrix
213	Program to find the frequency of odd & even numbers in the given matrix
214	Program to find the sum of each row and each column of a matrix
215	Program to find the transpose of a given matrix
216	Program to determine whether a given matrix is an identity matrix
217	Program to Transpose matrix
218	Program to determine whether a given matrix is a sparse matrix

String

S.No	Program
219	Program to Check if a String contains only digits?
220	Program to perform Deep Copy for String?
221	Program to prove String is immutable programmatically?
222	Program to remove all occurrences of a given character from input String?
223	Program to append the string using StringBuffer class
224	Program to insert the string using StringBuffer class
225	Program to Add Characters to a String
226	Program to Add Characters to a String
227	Program to Check Anagram
228	Program to check whether a string is a Palindrome
229	Program to Convert Enum to String
230	Program to Convert String to String Array
231	Program to count number of words in a String?
232	Program to count the total number of characters in a string
233	Program to count the total number of punctuation characters exists in a String
234	Program to count the total number of vowels and consonants in a string
235	Program to determine whether a given string is palindrome
236	Program to determine whether one string is a rotation of another
237	Program to divide a string in 'N' equal parts.
238	Program to find all subsets of a string
239	Program to find all the permutations of a string
240	Program to find maximum and minimum occurring character in a string
241	Program to find Reverse of the string
242	Program to find the duplicate characters in a string
243	Program to find the duplicate words in a string
244	Program to find the frequency of characters
245	Program to find the largest and smallest word in a string
246	Program to find the longest repeating sequence in a string
247	Program to find the most repeated word in a text file
248	Program to find the number of the words in the given text file
249	Program to Get a Character From the Given String
250	Program to Insert a string into another string
251	Program to Iterate Over Characters in String
252	Program to Print a New Line in String
253	Program to Print even length words
254	Program to print smallest and biggest possible palindrome word in a given string
255	Program to remove all the white spaces from a string
256	Program to replace lower-case characters with upper-case and vice-versa
257	Program to replace the spaces of a string with a specific character
258	Program to separate the Individual Characters from a String
259	Program to Splitting into a number of sub-strings
260	Program to swap two string variables without using third or temp variable.
261	Program to Swapping Pair of Characters
262	Read two String user input and check if first contains second?
263	Reserve String without reverse() function
264	Reverse String Word by Word
265	Write a program to check if two Strings are created with same characters?
266	Write a program to find out first non repeated character from input String?
267	Create an object StringBuffer class to reverse the string.
268	Create an object StringBuffer class to show functionality of insert, append, delete and replace functions.

OOPs

S.No	Program
269	Write a Java program to create a class called "Person" with a name and age attribute. Create two instances of the "Person" class, set their attributes using the constructor, and print their name and age.
270	Write a Java program to create a class called "Dog" with a name and breed attribute. Create two instances of the "Dog" class, set their attributes using the constructor and modify the attributes using the setter methods and print the updated values.
271	Write a Java program to create a class called "Rectangle" with width and height attributes. Calculate the area and perimeter of the rectangle.
272	Write a Java program to create a class called "Circle" with a radius attribute. You can access and modify this attribute. Calculate the area and circumference of the circle.
273	Write a Java program to create a class called "Book" with attributes for title, author, and ISBN, and methods to add and remove books from a collection.
274	Write a Java program to create a class called "Employee" with a name, job title, and salary attributes, and methods to calculate and update salary.
275	Write a Java program to create a class called "Bank" with a collection of accounts and methods to add and remove accounts, and to deposit and withdraw money. Also define a class called "Account" to maintain account details of a particular customer.
276	Write a Java program to create class called "TrafficLight" with attributes for color and duration, and methods to change the color and check for red or green.
277	Write a Java program to create a class called "Employee" with a name, salary, and hire date attributes, and a method to calculate years of service.
278	Write a Java program to create a class called "Student" with a name, grade, and courses attributes, and methods to add and remove courses.
279	Write a Java program to create a class called "Library" with a collection of books and methods to add and remove books.
280	Write a Java program to create a class called "Airplane" with a flight number, destination, and departure time attributes, and methods to check flight status and delay.
281	Write a Java program to create a class called "Inventory" with a collection of products and methods to add and remove products, and to check for low inventory.
282	Write a Java program to create a class called "School" with attributes for students, teachers, and classes, and methods to add and remove students and teachers, and to create classes.
283	Write a Java program to create a class called "MusicLibrary" with a collection of songs and methods to add and remove songs, and to play a random song.
284	Write a Java program to create a class called "Shape" with abstract methods for calculating area and perimeter, and subclasses for "Rectangle", "Circle", and "Triangle".
285	Write a Java program to create a class called "Movie" with attributes for title, director, actors, and reviews, and methods for adding and retrieving reviews.
286	Write a Java program to create a class called "Restaurant" with attributes for menu items, prices, and ratings, and methods to add and remove items, and to calculate average rating.
287	Write a Java program to create a class with methods to search for flights and hotels, and to book and cancel reservations.
288	Create a class showing an example of default constructor.
289	Create a class showing an example of parameterized constructor.
290	Create a class showing an example of copy constructor.
291	Create a class entering the rollno, name and class of the student from user but rollno should be automatically generated as we enter the information of 10 students
292	Create a class showing the area of circle and rectangle by method overloading.
293	Create a class, entering the command line arguments from the user and show all the arguments as output.
294	Write a Java program to create a class called Person with private instance variables name, age. and country. Provide public getter and setter methods to access and modify these variables.
295	Write a Java program to create a class called BankAccount with private instance variables accountNumber and balance. Provide public getter and setter methods to access and modify these variables.
296	Write a Java program to create a class called Rectangle with private instance variables length and width. Provide public getter and setter methods to access and modify these variables.
297	Write a Java program to create a class called Employee with private instance variables employee_id, employee_name, and employee_salary. Provide public getter and setter methods to access and modify the id and name variables, but provide a getter method for the salary variable that returns a formatted string.
298	Write a Java program to create a class called Circle with a private instance variable radius. Provide public getter and setter methods to access and modify the radius variable. However, provide two methods called calculateArea() and calculatePerimeter() that return the calculated area and perimeter based on the current radius value.
299	Write a Java program to create a class called Car with private instance variables company_name, model_name, year, and mileage. Provide public getter and setter methods to access and modify the company_name, model_name, and year variables. However, only provide a getter method for the mileage variable.
300	Write a Java program to create a class called Student with private instance variables student_id, student_name, and grades. Provide public getter and setter methods to access and modify the student_id and student_name variables. However, provide a method called addGrade() that allows adding a grade to the grades variable while performing additional validation.

Inheritance

S.No	Program
301	Write a Java program to create a class called Animal with a method called makeSound(). Create a subclass called Cat that overrides the makeSound() method to bark.
302	Write a Java program to create a class called Vehicle with a method called drive(). Create a subclass called Car that overrides the drive() method to print "Repairing a car".
303	Write a Java program to create a class called Shape with a method called getArea(). Create a subclass called Rectangle that overrides the getArea() method to calculate the area of a rectangle.
304	Write a Java program to create a class called Employee with methods called work() and getSalary(). Create a subclass called HRManager that overrides the work() method and adds a new method called addEmployee().
305	Write a Java program to create a class known as "BankAccount" with methods called deposit() and withdraw(). Create a subclass called SavingsAccount that overrides the withdraw() method to prevent withdrawals if the account balance falls below one hundred.
306	Write a Java program to create a class called Animal with a method named move(). Create a subclass called Cheetah that overrides the move() method to run.
307	Write a Java program to create a class known as Person with methods called getFirstName() and getLastName(). Create a subclass called Employee that adds a new method named getEmployeeId() and overrides the getLastName() method to include the employee's job title
308	Write a Java program to create a class called Shape with methods called getPerimeter() and getArea(). Create a subclass called Circle that overrides the getPerimeter() and getArea() methods to calculate the area and perimeter of a circle.
309	Write a Java program to create a vehicle class hierarchy. The base class should be Vehicle, with subclasses Truck, Car and Motorcycle. Each subclass should have properties such as make, model, year, and fuel type. Implement methods for calculating fuel efficiency, distance traveled, and maximum speed.
310	Write a Java program that creates a class hierarchy for employees of a company. The base class should be Employee, with subclasses Manager, Developer, and Programmer. Each subclass should have properties such as name, address, salary, and job title. Implement methods for calculating bonuses, generating performance reports, and managing projects.
311	Create a program, showing an example of super keyword
312	Create a program, showing an example of super function
313	Create a program, showing an example of method overriding
314	Create a program, showing an example of dynamic method dispatch
315	Write a Java program to create an abstract class Animal with an abstract method called sound(). Create subclasses Lion and Tiger that extend the Animal class and implement the sound() method to make a specific sound for each animal.
316	Write a Java program to create an abstract class Shape with abstract methods calculateArea() and calculatePerimeter(). Create subclasses Circle and Triangle that extend the Shape class and implement the respective methods to calculate the area and perimeter of each shape.
317	Write a Java program to create an abstract class BankAccount with abstract methods deposit() and withdraw(). Create subclasses: SavingsAccount and CurrentAccount that extend the BankAccount class and implement the respective methods to handle deposits and withdrawals for each account type.
318	Write a Java program to create an abstract class Animal with abstract methods eat() and sleep(). Create subclasses Lion, Tiger, and Deer that extend the Animal class and implement the eat() and sleep() methods differently based on their specific behavior.
319	Write a Java program to create an abstract class Employee with abstract methods calculateSalary() and displayInfo(). Create subclasses Manager and Programmer that extend the Employee class and implement the respective methods to calculate salary and display information for each role.
320	Write a Java program to create an abstract class Shape3D with abstract methods calculateVolume() and calculateSurfaceArea(). Create subclasses Sphere and Cube that extend the Shape3D class and implement the respective methods to calculate the volume and surface area of each shape
321	Write a Java program to create an abstract class Vehicle with abstract methods startEngine() and stopEngine(). Create subclasses Car and Motorcycle that extend the Vehicle class and implement the respective methods to start and stop the engines for each vehicle type.
322	Write a Java program to create an abstract class Person with abstract methods eat() and exercise(). Create subclasses Athlete and LazyPerson that extend the Person class and implement the respective methods to describe how each person eats and exercises.
323	Write a Java program to create an abstract class Instrument with abstract methods play() and tune(). Create subclasses for Glockenspiel and Violin that extend the Instrument class and implement the respective methods to play and tune each instrument.
324	Write a Java program to create an abstract class Shape2D with abstract methods draw() and resize(). Create subclasses Rectangle and Circle that extend the Shape2D class and implement the respective methods to draw and resize each shape.
325	Write a Java program to create an abstract class Bird with abstract methods fly() and makeSound(). Create subclasses Eagle and Hawk that extend the Bird class and implement the respective methods to describe how each bird flies and makes a sound.
326	Write a Java program to create an abstract class GeometricShape with abstract methods area() and perimeter(). Create subclasses Triangle and Square that extend the GeometricShape class and implement the respective methods to calculate the area and perimeter of each shape

Interfaces

S.No	Program
327	Write a Java program to create an interface Shape with the getArea() method. Create three classes Rectangle, Circle, and Triangle that implement the Shape interface. Implement the getArea() method for each of the three classes.
328	Write a Java program to create a Animal interface with a method called bark() that takes no arguments and returns void. Create a Dog class that implements Animal and overrides speak() to print "Dog is barking".
329	Write a Java program to create an interface Flyable with a method called fly_obj(). Create three classes Spacecraft, Airplane, and Helicopter that implement the Flyable interface. Implement the fly_obj() method for each of the three classes.
330	Write a Java programming to create a banking system with three classes - Bank, Account, SavingsAccount, and CurrentAccount. The bank should have a list of accounts and methods for adding them. Accounts should be an interface with methods to deposit, withdraw, calculate interest, and view balances. SavingsAccount and CurrentAccount should implement the Account interface and have their own unique methods.
331	Write a Java program to create an interface Resizable with methods resizeWidth(int width) and resizeHeight(int height) that allow an object to be resized. Create a class Rectangle that implements the Resizable interface and implements the resize methods.
332	Write a Java program to create an interface Drawable with a method draw() that takes no arguments and returns void. Create three classes Circle, Rectangle, and Triangle that implement the Drawable interface and override the draw() method to draw their respective shapes.
333	Write a Java program to create an interface Sortable with a method sort() that sorts an array of integers in ascending order. Create two classes BubbleSort and SelectionSort that implement the Sortable interface and provide their own implementations of the sort() method.
334	Write a Java program to create an interface Playable with a method play() that takes no arguments and returns void. Create three classes Football, Volleyball, and Basketball that implement the Playable interface and override the play() method to play the respective sports.
335	Write a Java program to create an interface Searchable with a method search(String keyword) that searches for a given keyword in a text document. Create two classes Document and WebPage that implement the Searchable interface and provide their own implementations of the search() method.
336	Write a Java program to create an interface Encryptable with methods encrypt (String data) and decrypt (String encryptedData) that define encryption and decryption operations. Create two classes AES and RSA that implement the Encryptable interface and provide their own encryption and decryption algorithms.
337	Write a Java program to create an interface Sortable with a method sort (int[] array) that sorts an array of integers in descending order. Create two classes QuickSort and MergeSort that implement the Sortable interface and provide their own implementations of the sort() method.

Input/ Output

S.No	Program
338	Enter the character from user using InputStreamReader
339	Enter the string from user using BufferedStreamReader
340	Enter the integer from user using Scanner class
341	Enter the float from user using Scanner class
342	Enter the double from user using Scanner class
343	Enter the boolean from user using Scanner class
344	Enter the short integer from user using Scanner class
345	Enter the long integer from user using Scanner class
346	Get all characters from the file and display on the screen
347	Get all characters from the file, count number of lines, words, characters and display on the screen

Packages

S.No	Program
348	Create a Java program to access the java.util.Date class through import keyword and print the current date of the system.
349	Create a Java program to access the java.util.Date class through qualified way and print the current date of the system.
350	Create a Java program to access the java.util.Date class through import keyword and print the current date of the system but inherit the Date class.
351	Create a Java program to access the java.util.Date class through qualified way and print the current date of the system but inherit the Date class.
352	Create a Java program to create a package with multiple default classes.
353	Create a Java program to create a package with 4 public classes, create the object in another file and call the function created in those classes.
354	Write a Java program to perform employee payroll processing using packages. In the java file, Emp.java creates a package employee and creates a class Emp. Declare the variables name,empid, category, bpay, hra, da, npay, pf, grosspay, incometax, and allowance. Calculate the values in methods. Create another java file Emppay.java. Create an object e to call the methods to perform and print values.
355	Create a Java program to create a package with public class and protected members to be accessed in another class.
356	Create a Java program to create a nested package i.e. c4.sample with public class and protected members to be accessed in another class.
357	Create a Java program to create a package with public class and public members to be accessed in another class.

Exception Handling

S.No	Program
358	Write a Java program that throws an exception and catch it using a try-catch block.
359	Write a Java program to create a method that takes an integer as a parameter and throws an exception if the number is odd.
360	Write a Java program to create a method that reads a file and throws an exception if the file is not found.
361	Write a Java program that reads a list of numbers from a file and throws an exception if any of the numbers are positive
362	Write a Java program that reads a file and throws an exception if the file is empty.
363	Write a Java program that reads a list of integers from the user and throws an exception if any numbers are duplicates.
364	Write a Java program to create a method that takes a string as input and throws an exception if the string does not contain vowels.
365	Write a Java program to connect the Java API to Database, if connection not successful then throw an exception.
366	Write a Java program to manage the driver with path, username and password, if not successful then throw an exception.
367	Write a Java program to throw the SQL Query, insert, delete, update, if not successful then throw an exception.
368	Write a Java program to show an example of throws Keyword.
369	Write a Java program to show an example of multiple catch.
370	Write a Java program to show an example of nested try block.

Delegation Event Model

S.No	Program
371	Java Program to Display Some Text in the Frame using Labels
372	Java Program to Create Text Area and Password Field
373	Java Program to Create a Button and Display Image in the Frame when Clicked
374	Java Program to Create 2 Radio Buttons and Display Selected Button Label
375	Java Program to Handle KeyBoardEvent
376	Java Program to Handle MouseEvent
377	Java Program to Get and Set State and Get Label of a Check Box
378	Java Program to Create Check Boxes and Radio Buttons
379	Java Program to Create and Switch between Frames using Buttons
380	Java Program to Create and Set Border to Push Buttons
381	Java Program to Create a List Box to Select Multiple Items and Display it in the Frame
382	Java Program to Display a Message in a New Frame
383	Java Program to Close the Frame using WindowAdapter Class
384	Java Program to Check Which Fonts are Available in a Local System
385	Java Program to Display Text in Different Fonts
386	Java Program to Change Frame Background Color as Cyan
387	Java Program to Change the Applet Background Colour when Button Clicked
388	Java Program to Display Several Dots on the Screen Continuously
389	Java Program to Validate the TextField for only entering numbers using KeyListener
390	Java Program to Validate the TextField for only entering email id using KeyAdapter

Applets

S.No	Program
391	Create an applet showing the string "Hello World" which is embedded in the HTML page.
392	Create an applet showing the string "Hello World" which is executed by an appletviewer.
293	Create an applet in Java to draw a circle.
394	Create an applet in Java to draw a polygon.
395	Create an applet in Java to draw a rectangle.
396	Create an applet in Java to draw a square.
397	Create an applet in Java to draw a 4 concentric circles.
398	Create an applet in Java to draw a line.
399	Create an applet in Java to draw a oval.
400	Create an applet in Java to draw a arc.
401	Create an applet in Java to change the background color.
402	Create an applet in Java to draw rounded rectangle.
403	Create an applet in Java to set font.
404	Create an applet to display a digital clock.
405	Java Program to Draw a Smiling Face using Graphics Class Methods.

Multithreading

S.No	Program
406	Write a Java program to create a basic Java thread that prints "Hello, World!" when executed.
407	Write a Java program that creates two threads to find and print even and odd numbers from 1 to 20.
408	Write a Java program that sorts an array of integers using multiple threads.
409	Write a Java program that performs matrix multiplication using multiple threads.
410	Write a Java program that calculates the sum of all prime numbers up to a given limit using multiple threads.
411	Write a Java program to implement a concurrent web crawler that crawls multiple websites simultaneously using threads.
412	Write a Java program that creates a bank account with concurrent deposits and withdrawals using threads.
413	Create the program to create multiple threads by using Runnbale interface
414	Create the program to create multiple threads by using Thread class
415	Create the program to create multiple threads, set its name and its priority.
416	Create the program to create multiple threads, show an example of synchronization keyword
417	Create the program to create multiple threads, show an example of notify, notifyall, wait, resume, sleep methods.
418	Create the program to create multiple threads, show an example of join and yield methods.

AWT

S.No	Program
419	Create a simple AWT application that displays a button with FlowLayout manager.
420	Create a simple AWT application that displays a button with Custom Layout.
421	Create a simple AWT application that displays multiple buttons with BorderLayout manager (North, East, West, South, Center).
422	Create a simple AWT application that displays a TextField with FlowLayout manager.
423	Create a simple AWT application that displays a TextField with Custom Layout.
424	Create a simple AWT application that displays a Checkbox with FlowLayout manager.
425	Create a simple AWT application that displays a Checkbox with Custom Layout.
426	Create a simple AWT application that displays a Label with FlowLayout manager.
427	Create a simple AWT application that displays a Label with Custom Layout.
428	Create a simple AWT application that displays a Choice with FlowLayout manager.
429	Create a simple AWT application that displays a Choice with Custom Layout.
430	Create a simple AWT application that displays a CheckboxGroup with FlowLayout manager.
431	Create a simple AWT application that displays a CheckboxGroup with Custom Layout.
432	Create a simple AWT application that displays a List with FlowLayout manager.
433	Create a simple AWT application that displays a List with Custom Layout.
434	Create a simple AWT application that displays a TextArea with FlowLayout manager.
345	Create a simple AWT application that displays a TextArea with Custom Layout.
346	Create a simple AWT application design a calculator that displays buttons, TextField with GridLayout manager.

JDBC

S.No	Program
437	Create the connection with MySQL Database and manage the driver.
438	Create the table in the database from Java API.
439	Insert the row in the table in the database from Java API.
440	Update the row in the table in the database from Java API.
441	Delete the row in the table in the database from Java API.
442	Select multiple rows from the database table in Java API and show the result on the screen.
443	Create a Scrollable Readonly Resultset and ask the row number from the user and display that row on the screen.
444	Create a Scrollable Updateable Resultset and insert a new row, update an existing row and delete the row from Resultset and also the changes should be made to the database also. The values should be inserted, updated and deleted by the user only.
445	Create a Java Program to show, insert, update, delete of the table in Java API through PreparedStatement.