Bellow is my java code. Which is for splitting of .csv files with header with a fixed number of rows.

import java.io.*;  
import java.util.Scanner;

import java.io.File;  
import java.io.FileInputStream;  
import java.util.Iterator;  
import org.apache.poi.ss.usermodel.Cell;  
import org.apache.poi.ss.usermodel.Row;  
import org.apache.poi.xssf.usermodel.XSSFSheet;  
import org.apache.poi.xssf.usermodel.XSSFWorkbook;


public class csv_split_with_hdr {  
public static void main(String args[])  {  
 try{  
  String inputfile = "C:/SUMIT/backup-old/SFDC/policy-extract/temp1/xxx.csv";
  System.out.println("Input Path is :- "+  inputfile);
  double nol = 2800.0; 
  File file = new File(inputfile);  
  Scanner scanner = new Scanner(file);  
  int count = 0;  
      while (scanner.hasNextLine())   
       {  
        scanner.nextLine();  
        count++;  
       }  
      System.out.println("Lines in the file: " + count);     

       double temp = (count/nol);  
       int temp1=(int)temp;  
       int nof=0;  
         if(temp1==temp)  
          {  
           nof=temp1;  
          }  
         else  
          {  
           nof=temp1+1;  
          }  
      System.out.println("No. of files to be generated :"+nof); 

  FileInputStream fstream = new FileInputStream(inputfile); DataInputStream in = new DataInputStream(fstream);  
  BufferedReader br = new BufferedReader(new InputStreamReader(in));
  String strLine;
  String header;
  header = br.readLine();

        for (int j=1;j<=nof;j++)  
         {  
          String outputpath = "C:/SUMIT/backup-old/SFDC/policy-extract/temp1";
          String outputfile = "xxx"+j+".csv";     
          System.out.println(outputpath+outputfile);
          FileWriter fstream1 = new FileWriter(outputpath+outputfile);     

         BufferedWriter out = new BufferedWriter(fstream1);
         out.write(header);
         out.newLine();
         for (int i=1;i<=nol;i++)  
          {  
           strLine = br.readLine();   
           if (strLine!= null)  
             {  
              out.write(strLine);   
              if(i!=nol)  
               {  
                out.newLine();  
               }  
             }  
          }  
          out.close();  
         }  

         in.close();  
    }
 catch (Exception e)  
 {  
  System.err.println("Error: " + e.getMessage());  
 }  
}  
}

 This code compiled and executed successfully when my system configuration was as follows
Processor : intel CORE i3, OS :- windows 7
java version :- "1.8.0_202"
java(TM) SE RUNTIME Environment (build 1.8.0_202-b08)
java Hotspot(TM) client VM (build 25.202-b08, mixed mode)

But recently I chanced my system, and the system configuration is presently 
Processor :  intel CORE 13, OS :- Windows 11
java version :- "22.0.1"  2024-04-16
java(TM) SE RUNTIME Environment (build 22.0.1+8-16)
java Hotspot(TM) 64-Bit Server VM (build 22.0.1+8-16, mixed mode, sharing)

But Now it is giving following error at the time of compilation through the command from cmd

C:sumitbackup-oldSFDCpolicy-extracttemp1>javac csv_split_with_hdr.java
csv_split_with_hdr.java:7: error: package org.apache.poi.ss.usermodel does not exist import org.apache.poi.ss.usermodel.Cell;
^
csv_split_with_hdr.java:8: error: package org.apache.poi.ss.usermodel does not exist import org.apache.poi.ss.usermodel.Row;
^
csv_split_with_hdr.java:9: error: package org.apache.poi.xssf.usermodel does not exist import org.apache.poi.xssf.usermodel.XSSFSheet;
^
csv_split_with_hdr.java:10: error: package org.apache.poi.xssf.usermodel does not exist import org.apache.poi.xssf.usermodel.XSSFWorkbook;
^

4 errors
C:sumitbackup-oldSFDCpolicy-extracttemp1>