How to read integers from file?

I want to write a program that reads numbers from both.txt file and write to even.txt if its even and to odd.txt if its odd numbers in java. i need help

i have managed to create these files

I have tried the following but its not working:

public static void main(String[] args) throws FileNotFoundException, IOException{
  File both = new File("/home/eddie/Desktop/both.txt"); 
  File odd = new File("/home/eddie/Desktop/odd.txt");      
  File even = new File("/home/eddie/Desktop/even.txt");
  
  Scanner myObj = new Scanner(System.in);
   int number,remainder;
    System.out.println("Please enter a number!");
        number = myObj.nextInt();
    
     
    try (PrintWriter pwboth = new PrintWriter(both)) {
        pwboth.println(number);
        pwboth.close(); 
    }
    remainder = number/2;
    
    if (remainder != 0)
    {
        
                
        
            try (PrintWriter pwodd = new PrintWriter(odd)) {
                pwodd.println(number);
                pwodd.close();
            }
    } 
    else if(remainder > 0)
{
      try (PrintWriter pweven = new PrintWriter(even)) {
           pweven.println(number);
           pweven.close();
        }
}
}

This code is only printing to odd.txt and both.txt even if its even number and i want the program to read numbers from the both file i just don't know how to go about it.

Solution

Note : The operator modulo (%) is used to get remainder value after division for Example: X % Y = Z means if X is divided by Y then it gave Z as remainder

So the definition of ODD and EVEN

number % 2 != 0 for ODD
number % 2 == 0 for EVEN

Here is correct code as you have posted having expected result:

public static void main(String[] args) {

        //Read & Write from and To the file

        File file = new File("source.txt");
        File even = new File("even.txt");
        File odd = new File("odd.txt");

        int number = 0;

        try (BufferedReader reader= new BufferedReader(new FileReader(file));
             PrintWriter evenWriter = new PrintWriter(even);
             PrintWriter oddWriter = new PrintWriter(odd);){

            String text = null;

            while ((text = reader.readLine()) != null) {
                number = Integer.parseInt(text) ;

                if(number % 2 == 0) {
                    evenWriter.println(number);
                }else{
                    oddWriter.println(number);
                }

            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

source.txt

even.txt

odd.txt