JAVA-Daily-Tasks
Day 10 - String Problem Solving
📌 Introduction
Day 10 of my Java Daily Tasks focuses on String Problem Solving.
In Day 09, I learned the basic operations of strings. In Day 10, I am applying strings to solve more logical and problem-solving-based programs.
This day includes counting vowels and consonants, counting digits and words, finding characters, removing vowels, checking anagrams, finding duplicate characters, counting character frequency, and reversing each word.
🎯 Objectives
The main objectives of Day 10 are:
- Improve string problem-solving skills
- Count vowels and consonants
- Count digits in a string
- Count words in a sentence
- Find the first character
- Find the last character
- Remove vowels from a string
- Check whether two strings are anagrams
- Find duplicate characters
- Find character frequency
- Reverse each word in a sentence
- Improve logical thinking using strings
📚 Topics Covered
- Strings
- String traversal
charAt()length()toLowerCase()replace()split()- Character comparison
- Vowel and consonant checking
- Digit checking
- Word counting
- Anagram checking
- Duplicate character detection
- Frequency counting
- String reversal
📁 Folder Structure
Day-10-String-Problem-Solving/
│
├── Questions/
│ └── Questions.txt
│
├── Screenshots/
│ ├── Output_1.png
│ ├── Output_2.png
│ ├── Output_3.png
│ ├── Output_4.png
│ ├── Output_5.png
│ ├── Output_6.png
│ ├── Output_7.png
│ ├── Output_8.png
│ ├── Output_9.png
│ └── Output_10.png
│
├── Solutions/
│ ├── Q01_Count_Vowels_And_Consonants.java
│ ├── Q02_Count_Digits.java
│ ├── Q03_Count_Words.java
│ ├── Q04_Find_First_Character.java
│ ├── Q05_Find_Last_Character.java
│ ├── Q06_Remove_Vowels.java
│ ├── Q07_Check_Anagram.java
│ ├── Q08_Find_Duplicate_Characters.java
│ ├── Q09_Find_Frequency_Of_Character.java
│ └── Q10_Reverse_Each_Word.java
│
└── README.md
📝 Practice Questions
Q01 - Count Vowels and Consonants
Count the number of vowels and consonants present in a given string.
Q02 - Count Digits
Count the number of digits present in a given string.
Q03 - Count Words
Count the number of words present in a given sentence.
Q04 - Find First Character
Find and print the first character of a given string.
Q05 - Find Last Character
Find and print the last character of a given string.
Q06 - Remove Vowels
Remove all vowels from a given string and display the remaining characters.
Q07 - Check Anagram
Check whether two given strings are anagrams of each other.
Q08 - Find Duplicate Characters
Find and print the duplicate characters present in a given string.
Q09 - Find Character Frequency
Find how many times a given character occurs in a string.
Q10 - Reverse Each Word
Reverse each word in a sentence without changing the order of the words.
💻 Solutions
| No. | Problem | Solution |
|---|---|---|
| Q01 | Count Vowels and Consonants | Q01_Count_Vowels_And_Consonants.java |
| Q02 | Count Digits | Q02_Count_Digits.java |
| Q03 | Count Words | Q03_Count_Words.java |
| Q04 | Find First Character | Q04_Find_First_Character.java |
| Q05 | Find Last Character | Q05_Find_Last_Character.java |
| Q06 | Remove Vowels | Q06_Remove_Vowels.java |
| Q07 | Check Anagram | Q07_Check_Anagram.java |
| Q08 | Find Duplicate Characters | Q08_Find_Duplicate_Characters.java |
| Q09 | Find Character Frequency | Q09_Find_Frequency_Of_Character.java |
| Q10 | Reverse Each Word | Q10_Reverse_Each_Word.java |
🖥️ Output Screenshots
Q01 - Count Vowels and Consonants
Q02 - Count Digits
Q03 - Count Words
Q04 - Find First Character
Q05 - Find Last Character
Q06 - Remove Vowels
Q07 - Check Anagram
Q08 - Find Duplicate Characters
Q09 - Find Character Frequency
Q10 - Reverse Each Word
🛠️ Technologies Used
- Java
- JDK
- VS Code
- Git
- GitHub
▶️ How to Run
Step 1 - Open the Day 10 folder
cd Day-10-String-Problem-Solving
Step 2 - Open the Solutions folder
cd Solutions
Step 3 - Compile a Java program
Example:
javac Q01_Count_Vowels_And_Consonants.java
Step 4 - Run the program
java Q01_Count_Vowels_And_Consonants
The same process can be followed for the remaining programs.
🧠 What I Learned
Through Day 10, I practiced:
- Working with strings
- Traversing strings using loops
- Accessing individual characters
- Counting vowels and consonants
- Counting digits
- Counting words
- Finding the first and last characters
- Removing vowels
- Checking whether strings are anagrams
- Finding duplicate characters
- Finding character frequency
- Reversing individual words
- Improving logical thinking and problem-solving skills
🎯 Learning Goal
The goal of Day 10 is to build a strong foundation in string-based problem solving before moving toward more advanced Java topics such as:
- Methods
- Object-Oriented Programming
- Collections
- Searching and Sorting Algorithms
- Data Structures
- DSA Problem Solving
📊 Progress
| Day | Topic | Status |
|---|---|---|
| Day 10 | String Problem Solving | ✅ Completed |
👨💻 Author
M. Praveen Kumar
- GitHub: PraveenKumar7545
- Repository: JAVA-Daily-Tasks
⭐ This is part of my Java Daily Tasks journey to improve my Java programming and problem-solving skills.