Error while reading files: Exception in thread "main" java.util.NoSuchElementException: No line found

Question

I have error call here time and date. I'm trying to add time and date specific file location because I want to list an time and date in file text so if I want to see the user attendance I can see the name, stuno, subject, section, time and date of them. Like a clock ticker? I want attendance system and I just want to add some time and date.

this is the error code message

Exception in thread "main" java.util.NoSuchElementException: No line found
at java.util.Scanner.nextLine(Unknown Source)
at GroupProjP3.database.main(database.java:44)

and here's my code:

public static void main(String[] args) throws Exception{
    SimpleDateFormat formatter = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss");
    BufferedReader buff = new BufferedReader(new InputStreamReader(System.in));
    ArrayList<String> name = new ArrayList<String>();
    ArrayList<String> studNo = new ArrayList<String>();
    ArrayList<String> section = new ArrayList<String>();
    ArrayList<String> subject = new ArrayList<String>();
    ArrayList<String> timeDate = new ArrayList<String>();
    Date td = new Date();


    File file1 = new File("C:\\Users\\WERLLY\\Desktop\\Onceng Files\\JAVA GROUP PROJECT\\name.txt");
    Scanner sca1 = new Scanner(file1);

    while(sca1.hasNextLine()) {
        String s = sca1.nextLine();
        name.add(s);
        }

    File file2 = new File("C:\\Users\\WERLLY\\Desktop\\Onceng Files\\JAVA GROUP PROJECT\\studNo.txt");
    Scanner sca2 = new Scanner(file1);

    while(sca2.hasNextLine()) {
        String s = sca1.nextLine();
        studNo.add(s);
        }

    File file3 = new File("C:\\Users\\WERLLY\\Desktop\\Onceng Files\\JAVA GROUP PROJECT\\section.txt");
    Scanner sca3 = new Scanner(file1);

    while(sca3.hasNextLine()) {
        String s = sca3.nextLine();
        section.add(s);
        }

    File file4 = new File("C:\\Users\\WERLLY\\Desktop\\Onceng Files\\JAVA GROUP PROJECT\\subject.txt");
    Scanner sca4 = new Scanner(file1);

    while(sca4.hasNextLine()) {
        String s = sca4.nextLine();
        subject.add(s);
        }

    File file5 = new File("C:\\Users\\WERLLY\\Desktop\\Onceng Files\\JAVA GROUP PROJECT\\TimeDate.txt");
    Scanner sca5 = new Scanner(file5);

    while(sca5.hasNextLine()) {
        String s = sca5.nextLine();
        timeDate.add(s);
    }

    while(true) {
        menu();
        char num = (char)buff.read();
        buff.readLine();

        switch(num){
            case '1': System.out.println("LOG IN FORM ATTENDANCE");
                System.out.print("Enter Full Name: ");
                String N = buff.readLine();
                name.add(N);
                System.out.print("Enter Student no.: ");
                String SN = buff.readLine();
                studNo.add(SN);
                System.out.print("Enter Section: ");
                String SEC = buff.readLine();
                section.add(SEC);
                System.out.print("Enter Current Subject: ");
                String SUB = buff.readLine();
                subject.add(SUB);
                System.out.println(td);
                String TD = buff.readLine();
                timeDate.add(TD);
                System.out.println("Attendance Added");
                FileWriter FW1 = new FileWriter("C:\\Users\\WERLLY\\Desktop\\Onceng Files\\JAVA GROUP PROJECT\\name.txt",true);
                FW1.write(N + System.getProperty("line.separator"));
                FW1.close();
                FileWriter FW2 = new FileWriter("C:\\Users\\WERLLY\\Desktop\\Onceng Files\\JAVA GROUP PROJECT\\studNo.txt",true);
                FW2.write(SN + System.getProperty("line.separator"));
                FW2.close();
                FileWriter FW3 = new FileWriter("C:\\Users\\WERLLY\\Desktop\\Onceng Files\\JAVA GROUP PROJECT\\section.txt",true);
                FW3.write(SEC + System.getProperty("line.separator"));
                FW3.close();
                FileWriter FW4 = new FileWriter("C:\\Users\\WERLLY\\Desktop\\Onceng Files\\JAVA GROUP PROJECT\\subject.txt",true);
                FW4.write(SUB + System.getProperty("line.separator"));
                FW4.close();
                FileWriter FW5 = new FileWriter("C:\\Users\\WERLLY\\Desktop\\Onceng Files\\JAVA GROUP PROJECT\\TimeDate.txt",true);
                FW5.write(TD + System.getProperty("line.separator"));
                FW5.close();
                break;
                    }
            }
        }

}

Copy & Paste last line makes it unclear what is written at 44th line in the database.java file. It would be nice to have a look at repo with the code. — Malakai, Dec 02 '19 at 14:24

score 1 · Answer 1 · answered Dec 02 '19 at 14:24

1

In your second loop reading into studNo you call sca1.nextLine instead of sca2.nextLine().

Since you'll only reach that line when sca2.hasNextLine() has returned false this will fail.

answered Dec 02 '19 at 14:24

Joachim Sauer

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Im sorry for that i didn't notice that. i already edit that line in my orig code. my point is i want to add a command that automatically add time and date in a notepad file i assigned so if the user is log in to check his/her attendance it will automatically write the time and date in notepad. but i try to trick the java command. System.out.println(TD); String TD = buff.readLine(); timeDate.add(TD): i tought this code will work but the error occured. i just want automatically write the time and date so the user dont need to write it manually. Sorry for my english – HelpMeMahPrend Dec 03 '19 at 04:11

Error while reading files: Exception in thread "main" java.util.NoSuchElementException: No line found

1 Answers1