Java Programs

String

1. Java Program to Count The Frequency of Each Character in a String
2. Java Program to Count Number of Words in a String
3. Java Program to Find Duplicate Characters in a String With Repetition Count
4. Java Program to Check Given String Palindrome or Not
5. Java Program to Find Longest Palindrome in The Given String
6. Java Program to Check if The Given Strings Are Anagram or Not
7. How to Split a String in Java
8. How to Reverse a String in Java
9. Java Program to Reverse Each Word in a String
10. Java Program to Reverse a String In-place
11. Find Length of String Without Using length() Method in Java
12. Java Program to Find First Non-Repeated Character in The Given String
13. Check if Given String Subsequence of Another String in Java
14. Convert Char to String And String to Char in Java
15. How to Convert String to Byte Array in Java
16. How to Convert String to int in Java
17. How to Convert String to float in Java
18. How to Convert String to double in Java
19. Java Programs For Displaying Patterns

Number

1. Check Given Number Palindrome or Not in Java
2. Java Program to Check Whether Number Prime or Not
3. Display Prime Numbers in Java
4. How to Reverse a Number in Java
5. Java Program to Swap Two Numbers Without Using Third Variable
6. Java Program to Check if Armstrong Number
7. Java Program to Display Armstrong Numbers
8. Java Program to Find Factorial
9. Fibonacci Series Java Program
10. Arrange Given Numbers to Form The Biggest Number in Java
11. Java Program to Convert Numbers to Words
12. How to Convert int to String in Java
13. How to Convert float to String in Java
14. How to Convert double to String in Java
15. How to Convert float to int in Java
16. How to Convert double to int in Java
17. Stable or Unstable Number Java Program

Array

1. Matrix Multiplication Java Program
2. Matrix Addition Java Program
3. Matrix Subtraction Java Program
4. Java Program to Find Maximum And Minimum Number in a Matrix
5. Java Program to Find The Maximum Element in Each Row of a Matrix
6. Remove Element From an Array in Java
7. Java Program to Remove Duplicate Elements From an Array
8. Java Program to Find Common Element Between Two Arrays
9. Java Program to Find Maximum And Minimum Values in an Array
10. Find The Largest And Second Largest Element of an Array in Java
11. Reverse an Array In-place Java Program

Java I/O

1. How to Read File in Java
2. How to Write to a File in Java
3. How to Append to a File in Java
4. How to Read Delimited File in Java
5. How to Read Input From Console in Java
6. Read File Asynchronously in Java
7. Write a File Asynchronously in Java
8. Read Excel File in Java Using Apache POI
9. Write to Excel File in Java Using Apache POI
10. How to Convert File to Byte Array in Java
11. How to Copy a Directory in Java
12. Delete a File or Directory Using a Java Program
13. How to Make a File or Folder Hidden in Java
14. How to List All The Files in a Directory in Java
15. Renaming a File Using Java Program
16. How to Get The Last Modified Date of a File in Java
17. Java Program to Find File Extension
18. Java Program to Get Files Having a Specific Extension
19. Java Program to Delete Files Having a Specific Extension
20. How to Create Temporary File in Java
21. How to Zip Files in Java
22. How to Zip a Folder in Java
23. How to Unzip a File in Java
24. Creating Password Protected Zip File in Java
25. GZIP File in Java – Compression And Decompression
26. GZIP Multiple Files in Java Creating Tar Archive
27. Decompress And Untar Multiple Gzipped files in Java

Java Multithreading

1. Get Current Thread Name And Thread ID in Java
2. Print Odd And Even Numbers Using Two Threads in Java
3. Print Numbers Sequentially Using Three Threads in Java
4. Producer-Consumer Problem Java Program
5. How to Create a Deadlock in Java

Generating PDF using Java

1. Generate PDF From XML in Java Using Apache FOP
2. Generating PDF in Java Using iText Tutorial
3. Read PDF in Java Using iText
4. Merging PDFs in Java Using iText
5. Password Protected PDF Using iText in Java
6. Generating PDF in Java Using OpenPDF Tutorial
7. Read PDF in Java Using OpenPDF
8. Merging PDFs in Java Using OpenPDF
9. Password Protected PDF Using OpenPDF in Java
10. Convert HTML to PDF in Java Using Flying Saucer, OpenPDF
11. Generating PDF in Java Using PDFBox Tutorial
12. Password Protected PDF Using PDFBox in Java
13. Java PDFBox Example - Read Text And Extract Image From PDF
14. Merging PDFs in Java Using PDFBox
15. Convert HTML to PDF in Java Using Openhtmltopdf, PDFBox

Sorting Programs in Java

1. Bubble Sort Java Program
2. Generic Bubble Sort Java Program
3. Selection Sort Java Program
4. Insertion Sort Java Program
5. Merge Sort Java Program
6. Shell Sort Java Program
7. Quick Sort Java Program
8. Counting Sort Java Program
9. Bucket Sort Java Program
10. Radix Sort Java Program
11. Tree Sort Java Program
12. Heap Sort Java Program
13. Stable and Unstable Sorting Algorithms
14. What is In-place Algorithm

Java Date and Time

1. Java Date Difference Program
2. Convert Date to String in Java
3. Convert String to Date in Java
4. Getting Current Date and Time in Java
5. Display Time in 12 Hour Format With AM/PM in Java
6. Display Time in 24 Hour Format in Java
7. Compare Dates in Java
8. Java Program to Convert Date to LocalDate, LocalDateTime
9. Java Program to Convert Between Time Zones
10. Convert Instant to Java LocalDateTime, LocalTime
11. Convert LocalDate, LocalTime, LocalDateTime to Java Instant
12. Convert LocalDate to Date in Java
13. Convert LocalDateTime to OffsetDateTime in Java
14. Convert 24 Hours Time to 12 Hours Time Format in Java