Java Community | Help. Code. Learn.•6d ago

Fix try catch

Pls hepl me fix that try { LocalDateTime today = LocalDateTime.parse(events.getFirst(), DateTimeFormatter.ofPattern(dft)); System.out.println("--- Statistics ---"); System.out.println("Total events: " + events.size()); System.out.println("Events today: " + today.format(date)); System.out.println("First Event: " + events.get(0)); } catch (DateTimeException e){ System.out.println("Error date formatting: " + e.getMessage()); }

13 Replies

JavaBot•6d ago

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ayylmao123xdd•6d ago

well whats the problem

DexterOP•6d ago

Not print Events Error date formatting: Text 'g 26/11/2025 18:25' could not be parsed at index 0 I can give full code

Dexter•6d ago

import java.io.*; import java.time.DateTimeException; import java.time.LocalDateTime; import java.time.format.DateTimeFormatter; import java.util.ArrayList; import java.util.Scanner;

public class EventLogger {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        ArrayList<String> events = new ArrayList<>();

        System.out.print("Write event: ");
        String event = input.nextLine();

        DateTimeFormatter date = DateTimeFormatter.ofPattern("dd/MM/yyyy HH:mm");
        String dft = date.format(LocalDateTime.now());


        try(BufferedWriter writer = new BufferedWriter(new FileWriter("events.txt", true))) {writer.write(event + " " + dft + "\n");
            System.out.println("Event: " + event +  " " + dft);
        } catch (IOException e){
            System.out.println("Error writing to file" + e.getMessage());
        }

        try(BufferedReader br = new BufferedReader(new FileReader("events.txt"))){
            String line;
            while ((line = br.readLine()) != null){
                events.add(line);
            }
        } catch (IOException e){
            System.out.println("Error reading file" + e.getMessage());
        }

        try {
            LocalDateTime today = LocalDateTime.parse(events.getFirst(), DateTimeFormatter.ofPattern(dft));
            System.out.println("--- Statistics ---");
            System.out.println("Total events: " + events.size());
            System.out.println("Events today: " + today.format(date));
            System.out.println("First Event: " + events.get(0));
        } catch (DateTimeException e){
            System.out.println("Error date formatting: " + e.getMessage());
        }

    }
}

public class EventLogger {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        ArrayList<String> events = new ArrayList<>();

        System.out.print("Write event: ");
        String event = input.nextLine();

        DateTimeFormatter date = DateTimeFormatter.ofPattern("dd/MM/yyyy HH:mm");
        String dft = date.format(LocalDateTime.now());


        try(BufferedWriter writer = new BufferedWriter(new FileWriter("events.txt", true))) {writer.write(event + " " + dft + "\n");
            System.out.println("Event: " + event +  " " + dft);
        } catch (IOException e){
            System.out.println("Error writing to file" + e.getMessage());
        }

        try(BufferedReader br = new BufferedReader(new FileReader("events.txt"))){
            String line;
            while ((line = br.readLine()) != null){
                events.add(line);
            }
        } catch (IOException e){
            System.out.println("Error reading file" + e.getMessage());
        }

        try {
            LocalDateTime today = LocalDateTime.parse(events.getFirst(), DateTimeFormatter.ofPattern(dft));
            System.out.println("--- Statistics ---");
            System.out.println("Total events: " + events.size());
            System.out.println("Events today: " + today.format(date));
            System.out.println("First Event: " + events.get(0));
        } catch (DateTimeException e){
            System.out.println("Error date formatting: " + e.getMessage());
        }

    }
}

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DexterOP•6d ago

pls help fix because i dont know how fix it i asced gemini,gpt and grok but nothing Event: пвап 26/11/2025 19:40 Error date formatting: Text 'g 26/11/2025 18:25' could not be parsed at index 0 (print)

Madjosz•6d ago

Well there is a line in your events.txt which does not conform to your datetime formatter pattern.

DexterOP•6d ago

There seems to be an exception that ignores this, did I write it or is something wrong?

Madjosz•6d ago

Yes, it tries to parse the first line of the file, fails, and logs the error message.

DexterOP•6d ago

I just don't know what to do anymore, it doesn't work, the AI doesn't help, it just writes nonsense

Madjosz•6d ago

The problem is that you store [event name] [event date] in the file but try to parse the whole line as the date. So you need to extract the date from the line again. Since your date is always 16 characters long, you could substring the last 16 characters from the line.

String firstEvent = events.getFirst();
LocalDateTime today = LocalDateTime.parse(firstEvent.substring(firstEvent.length - 16), date);

String firstEvent = events.getFirst();
LocalDateTime today = LocalDateTime.parse(firstEvent.substring(firstEvent.length - 16), date);

Ah and DateTimeFormatter.ofPattern(dft) is wrong. dft is not a pattern but the formatted today.

DexterOP•6d ago

thanks

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