Added Practice Demo Code1.

Signed-off-by: Someshdiwan <Someshdiwan369@gmail.com>

Author: Someshdiwan

Section23JavaIOStreams/DemoCodes/TXT Files/Demo1.txt

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+//This Java program reads a text file character by character using FileInputStream and prints its content to the console.

Section23JavaIOStreams/DemoCodes/src/Demo1.java

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+import java.io.FileInputStream;
+public class Demo1
+{
+    public static void main(String args[]){
+        try
+        {
+            FileInputStream fin=new FileInputStream("C://Users//somes//Downloads//NoteApp//JavaEvolution-Learning-Growing-Mastering\\Section23JavaIOStreams\\DemoCodes\\TXT Files\\Demo1.txt");
+            int i=0;
+
+            while((i=fin.read())!=-1)
+            {
+                System.out.print((char)i);
+            }
+
+            /*
+                    Reads the file one byte at a time.
+                    fin.read() returns an int representing the byte value. It returns -1 when the end of the file (EOF) is reached.
+                    (char)i converts the byte into a character, and it prints it to the console.
+                    So, this part prints the entire content of the file.
+            */
+            fin.close();
+        }
+        catch(Exception e)
+        {
+            System.out.println(e);
+        }
+    }
+}