Practice File I/O in Java

File I/O exercises

1. Write to File Java exercise — Write text to a file
2. Read from File Java exercise — Read contents of a file
3. Append to File Java exercise — Append text to existing file
4. Count Lines in File Java exercise — Count the number of lines in a file
5. Copy File Java exercise — Copy contents from one file to another
6. Check File Exists Java exercise — Check if a file exists before operations
7. Count Words in File Java exercise — Count total words in a file
8. Search in File Java exercise — Search for a word in file and count occurrences
9. Reverse File Lines Java exercise — Reverse the order of lines in a file
10. Merge Multiple Files Java exercise — Merge contents of multiple files
11. Remove Duplicate Lines Java exercise — Remove duplicate lines from a file
12. Sort File Lines Java exercise — Sort lines of a file alphabetically
13. File Statistics Java exercise — Calculate statistics about a text file
14. Simple CSV Reader Java exercise — Parse a simple CSV file
15. Find and Replace in File Java exercise — Find and replace text in a file
16. Log File Parser Java exercise — Parse and filter log entries
17. Word Frequency Counter Java exercise — Count word frequencies in a file
18. Simple File Encryption Java exercise — Encrypt file contents using Caesar cipher
19. Config File Parser Java exercise — Parse a key=value configuration file
20. File Difference Checker Java exercise — Compare two files and show differences
21. Simple JSON Handler Java exercise — Read and parse simple JSON from file
22. CSV Parser Java exercise — Parse CSV formatted data
23. Extract Error Entries from Logs Java exercise — Extract errors from log entries
24. Configuration Reader Java exercise — Parse key=value configuration format