How to get an exact SQL query containing an exception in batch processing

I want to do the following:

(transfer to PRESENTATION DB a row from the selected DB processing row)

    PreparedStatement stmt;
    Statement st;
    Connection conn = ConnectionManager.getInstance().getConnection(ConnectionManager.PRESENTATION_DB);
    try {
        conn.setAutoCommit(false);
        stmt = conn.prepareStatement(
               "insert into customer (name,category,age) values (?,?,?)");  
                    stmt.clearParameters();
                    stmt.setString(1,"name2");
                    stmt.setString(2,"cat2");
                    stmt.setInt(3,25);
                    stmt.addBatch();
                    stmt.clearParameters();
                    stmt.setString(1,"name3");
                    stmt.setString(2,"cat3");
                    stmt.setInt(3,25);
                    stmt.addBatch();
                    stmt.clearParameters();
                    stmt.setString(1,"name4");
                    stmt.setString(2,"cat2");
                    stmt.setInt(3,25);
                    stmt.addBatch();
                    stmt.clearParameters();
                    stmt.setString(1,"name4");
                    stmt.setString(2,"cat2");
                    //stmt.setInt(3,25);

                    //this is parameter with false input
                    stmt.setString(3,"null"); 

                    stmt.addBatch();
                    stmt.clearParameters();
                    stmt.setString(1,"name5");
                    stmt.setString(2,"cat5");
                    stmt.setInt(3,25);
                    stmt.addBatch();
                    stmt.clearParameters();

        int [] updateCounts = stmt.executeBatch();
        conn.commit();
        conn.setAutoCommit(true);

                    stmt.close();
        conn.close();
    } 
    catch(BatchUpdateException b) {
                    System.err.println("-----BatchUpdateException-----");
                    System.err.println("SQLState:  " + b.getSQLState());
                    System.err.println("Message:  " + b.getMessage());
                    System.err.println("Vendor:  " + b.getErrorCode());
                    System.err.print("Update counts:  ");
                    int [] updateCounts = b.getUpdateCounts();
                    for (int i = 0; i < updateCounts.length; i++) {
                            System.err.print(updateCounts[i] + "   ");
                    }
                    System.err.println("");
            }
    catch (Exception e) {
        e.printStackTrace();
    }

How can I identify a string due to which an exception can re-execute batch processing without this particular string? (Updating the hasError string field).

Currently, I do not save objects in batch mode, so I can mark a line if it causes an error, and skip this line and proceed to processing (i.e. save / transfer and delete) another line.

Thank!

Update:

Ok, I used the following code to track strings (if any line causes an error):

        public static void processUpdateCounts(int[] updateCounts) {
            for (int i=0; i<updateCounts.length; i++) {
                if (updateCounts[i] >= 0) {
                    // Successfully executed; the number represents number of affected rows
                    logger.info("Successfully executed: number of affected rows: "+updateCounts[i]);
                } else if (updateCounts[i] == Statement.SUCCESS_NO_INFO) {
                    // Successfully executed; number of affected rows not available
                    logger.info("Successfully executed: number of affected rows not available: "+updateCounts[i]);
                } else if (updateCounts[i] == Statement.EXECUTE_FAILED) {
                    logger.info("Failed to execute: "+updateCounts[i]);
                    // Failed to execute
                }
            }
        }

And added the line:

        processUpdateCounts(updateCounts);

so I can see the changes with or without an error, but it looks like BatchUpdateException is not working?