feat(ConvertNumbersIntoArrayList): add program to parse numbers from file into ArrayList

What
- Added ConvertNumbersIntoArrayList in Package.
- Reads a text file containing numbers separated by commas.
- Uses StringTokenizer to split numbers and stores them in an ArrayList<Integer>.
- Prints the resulting list to console.

Why
- Demonstrates file reading and parsing of delimited data.
- Shows how to convert raw text input into structured Java collections.
- Useful for lightweight parsing of CSV-style numeric data.

How
- Opened FileInputStream on a file path containing comma-separated numbers.
- Read file contents into byte array, then converted to String.
- Created StringTokenizer with `","` as delimiter.
- Iterated over tokens, converted each String token to Integer using Integer.valueOf().
- Added integers into ArrayList.
- Printed the ArrayList for verification.

Logic
- FileInputStream reads raw bytes from file.
- new String(b) constructs a string representation of file contents.
- StringTokenizer splits input based on specified delimiter (comma here).
- Integer.valueOf(s) safely parses numeric tokens into Integer objects.
- ArrayList grows dynamically as tokens are parsed.

Real-life applications
- Parsing CSV or configuration files where numbers are stored as comma-separated values.
- Converting external input (from text files, network logs, etc.) into usable Java collections.
- Preprocessing datasets for further computation or analytics.

Summary
- ConvertNumbersIntoArrayList reads a file of comma-separated numbers.
- Splits data into tokens and converts each into Integer.
- Stores parsed integers in ArrayList and prints the final collection.
- Demonstrates integration of File I/O, String processing, and collection handling in Java.

Signed-off-by: https://github.com/Someshdiwan <someshdiwan369@gmail.com>

Author: Someshdiwan

…zerDemo/ConvertNumbersIntoArrayList.java …Package/ConvertNumbersIntoArrayList.javaSection25CollectionFramework/src/StringTokenizerDemo/ConvertNumbersIntoArrayList.java renamed to Section23JavaIOStreams/String Tokenizer/src/Package/ConvertNumbersIntoArrayList.java Section25CollectionFramework/src/StringTokenizerDemo/ConvertNumbersIntoArrayList.java renamed to Section23JavaIOStreams/String Tokenizer/src/Package/ConvertNumbersIntoArrayList.java

@@ -1,14 +1,12 @@
-package StringTokenizerDemo;
+package Package;
 
 import java.io.FileInputStream;
 import java.util.ArrayList;
 import java.util.StringTokenizer;
 
 public class ConvertNumbersIntoArrayList {
-    public static void main(String[] args)throws Exception
-    {
-        FileInputStream fis = new FileInputStream("C://Users\\somes\\Downloads\\JAVA SE\\Section25CollectionFramework\\src\\StringTokenizerDemo\\Numbers.txt");
-
+    public static void main(String[] args)throws Exception {
+        FileInputStream fis = new FileInputStream("/Users/somesh/Java SE/JavaEvolution-Learning-Growing-Mastering/Section23JavaIOStreams/String Tokenizer.txt/src/Package/Numbers.txt");
         byte b[]=new byte[fis.available()];
 
         fis.read(b);
@@ -19,11 +17,10 @@ public static void main(String[] args)throws Exception
         String s;
         ArrayList<Integer> al = new ArrayList<>();
 
-        while (stk.hasMoreTokens())
-        {
+        while (stk.hasMoreTokens()) {
             s=stk.nextToken();
             al.add(Integer.valueOf(s));
         }
         System.out.println(al);
     }
-}
+}

Section23JavaIOStreams/String Tokenizer/src/Package/Numbers.txt

@@ -0,0 +1 @@
+10,20,30,40,50,60,70,80,90,100