Java – JDBC PreparedStatement queries

I am developing JDBC using Oracle Database.
I have the following method:

// Method1
public void method1(){
    Connection connection=ConnectionFactory.getRemoteConnection();
    selectSQL = "select * tablename where num>=? and num<=?";
    PreparedStatement userStatement=connection.prepareStatement(selectSQL);
    userStatement.setFetchSize(500);
    int i=0;
    int startRow=0;
    int endRow=50;
    do{
        Reusing the statement
       fetchRecords(userStatement,startRow,endRow);
       startRow=startRow+50;
       endRow=endRow+50;
       i++;
       if(i==50) endOfRows=true;
    }while(!endOfRows);
    userStatement.close();
}

 Method2
public List<String> fetchRecords(PreparedStatement userStatement,int startRow,int endRow){
    userStatement.setInt(1, startRow);
    userStatement.setInt(2, endRow);
    resultSet = userStatement.executeQuery();
    /*Some logic*/
    ...
}

As you can see, I’m trying to reuse prepared statements.
Now, my question is is to create a prepared statement every time the parameter is changed?

I only close the statement after all processing in method 1 is complete.
I’m concerned that if a new statement is created every time the parameters are changed (since I didn’t close all the arguments), it might end up with an unclosed statement.
Should I be worried?

Thank you,
Belt

java.sql.PreparedStatement is designed to be reusable.

When you set a new parameter, you

overwrite the previous parameter, but you do not create a new statement.

You can also use clearParameters() Clear all parameters at your discretion