import java.io.IOException;

import java.io.PrintWriter;

import java.io.StreamTokenizer;

import java.util.ArrayList;

import java.util.List;

public class RecordErrorSurface {

public static void surfaceErrors(String record, String delimiter) {

// Use StreamTokenizer for parsing (compatible with older Java versions)

StreamTokenizer tokenizer = new StreamTokenizer(new java.io.StringReader(record));

tokenizer.quoteChar = '"'; // Handle quoted fields

tokenizer.whitespace = true; // Treat whitespace as delimiters

List<String> fields = new ArrayList<>();

try {

while (tokenizer.nextToken() != tokenizer.TT_EOF) {

fields.add(tokenizer.sval); // Get field value

}

} catch (IOException e) {

System.err.println("Error parsing record: " + e.getMessage());

return; // Exit if parsing fails

}

// Check for errors (example: record too short)

if (fields.size() < 2) {

System.err.println("Error: Record contains less than 2 fields.");

System.err.println("Record: " + record);

return;

}

// Example: checking for null or empty fields

for (int i = 0; i < fields.size(); i++) {

if (fields.get(i) == null || fields.get(i).trim().isEmpty()) {

System.err.println("Error: Field '" + (i + 1) + "' is null or empty.");

System.err.println("Record: " + record);

return;

}

}

//More complex validation can be added here,

//e.g., checking data types, ranges, etc.

System.out.println("Record is valid.");

}

public static void main(String[] args) {

//Example Usage

String record1 = "John,Doe,30,New York";

String record2 = "Jane , , 25, London"; //Missing data

String record3 = "Peter,Smith"; //Too few fields

String record4 = "Alice,\"Brown, Mary\",40,Paris"; //Quoted field

System.out.println("Testing record: " + record1);

surfaceErrors(record1, ",");

System.out.println("\nTesting record: " + record2);

surfaceErrors(record2, ",");

System.out.println("\nTesting record: " + record3);

surfaceErrors(record3, ",");

System.out.println("\nTesting record: " + record4);

surfaceErrors(record4, ",");

}

}