feat: implement DataOutputStream and DataInputStream example for float arrays

WHAT:
- Added `DataOutPutStreamExampleForFloat` class.
- Demonstrates writing and reading an array of float values to/from a file.

HOW:
1. Declared a float array with sample values.
2. Opened `FileOutputStream` wrapped in `DataOutputStream`.
3. First wrote array length using `writeInt()`.
4. Iterated over the array and wrote each float using `writeFloat()`.
5. Closed output streams.
6. Reopened the same file using `FileInputStream` + `DataInputStream`.
7. Read array length back using `readInt()`.
8. Read each float sequentially using `readFloat()` and printed values.
9. Closed input streams.

KEY POINTS:
- `DataOutputStream` and `DataInputStream` are paired classes to write
  and read Java primitives in a binary format.
- Order of writing/reading must exactly match, else deserialization breaks.
- This avoids manual string parsing and ensures efficient binary storage.

REAL-WORLD APPLICATIONS:
- Saving numerical datasets (e.g., sensor values, ML model parameters).
- Game development (storing player stats, positions, scores).
- Finance apps (writing and reading currency/exchange rate values).
- Lightweight persistence without full database overhead.

BENEFITS:
- Compact binary storage (efficient space usage).
- Faster read/write compared to text parsing.
- Cross-platform consistency (same binary format for Java apps).

NEXT IMPROVEMENTS:
- Add try-with-resources to simplify stream closing.
- Wrap logic into methods (`writeFloatArray`, `readFloatArray`) for reusability.
- Add exception handling/logging for robustness.

Signed-off-by: https://github.com/Someshdiwan <[email protected]>

Author: Someshdiwan

Section23JavaIOStreams/Serialisation Storing Data in a File/src/DataOutPutStreamExampleForFloat.java

@@ -1,34 +1,32 @@
 import java.io.*;
-public class DataOutPutStreamExampleForFloat
-{
-    public static void main(String[] args) throws Exception
-    {
-        float list[]={1.2f , 3.45f , 6.78f , 9.01f , 2.34f};
+public class DataOutPutStreamExampleForFloat {
+    public static void main(String[] args) throws Exception {
+        float list[] = {1.2f , 3.45f , 6.78f , 9.01f , 2.34f};
 
-        FileOutputStream fos=new FileOutputStream("C://Users\\somes\\Downloads\\JAVA SE\\Section23JavaIOStreams\\Serialisation Storing Data in a File\\MyJAVA\\List.txt");
-        DataOutputStream dos=new DataOutputStream(fos);
+        FileOutputStream fos = new FileOutputStream("/Users/somesh/Java SE/JavaEvolution-Learning-Growing-Mastering/Section23JavaIOStreams/src/MyJAVA/List.txt");
+        DataOutputStream dos = new DataOutputStream(fos);
 
         dos.writeInt(list.length);
-        for(float f:list)
-        {
+
+        for(float f:list) {
             dos.writeFloat(f);
         }
 
         dos.close();
         fos.close();
 
-        FileInputStream fis=new FileInputStream("C://Users\\somes\\Downloads\\JAVA SE\\Section23JavaIOStreams\\Serialisation Storing Data in a File\\MyJAVA\\List.txt");
+        FileInputStream fis=new FileInputStream("/Users/somesh/Java SE/JavaEvolution-Learning-Growing-Mastering/Section23JavaIOStreams/src/MyJAVA/List.txt");
         DataInputStream dis=new DataInputStream(fis);
+
         int length=dis.readInt();
+
         float data;
 
-        for(int i=0;i<length;i++)
-        {
-            data=dis.readFloat();
+        for(int i=0;i<length;i++) {
+            data = dis.readFloat();
             System.out.println(data);
         }
         dis.close();
         fis.close();
-
     }
-}
+}