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java:util_scanner_class
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java:util_scanner_class [2021/04/04 17:23] gthanos [Παράδειγμα ανάγνωσης με χρήση της Scanner] |
java:util_scanner_class [2021/05/14 15:31] gthanos [Παράδειγμα ανάγνωσης με χρήση της Scanner] |
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| ==== Παράδειγμα ανάγνωσης με χρήση της Scanner ==== | ==== Παράδειγμα ανάγνωσης με χρήση της Scanner ==== | ||
| - | <code java ReadWithScanner.java> | + | Το παρακάτω παράδειγμα διαβάζει από ένα αρχείο ένα σύνολο εγγραφών και δημιουργεί ένα πίνακα αντικειμένων τύπου TelephoneNumber. Στη συνέχεια εκτυπώνει τα περιεχόμενα του πίνακα στην κονσόλα. |
| - | import java.util.*; | + | |
| - | import java.io.*; | + | |
| + | <code java ReadWithScanner.java> | ||
| public class ReadWithScanner { | public class ReadWithScanner { | ||
| public static void main(String []args) { | public static void main(String []args) { | ||
| + | | ||
| + | TelephoneNumber[] numbers; | ||
| + | numbers = readTelephoneNumbers(" | ||
| + | printTelephoneNumbers(numbers); | ||
| + | } | ||
| + | | ||
| + | public static void printTelephoneNumbers(TelephoneNumber[] numbers) { | ||
| + | for(TelephoneNumber number : numbers) { | ||
| + | System.out.println(number); | ||
| + | } | ||
| + | } | ||
| + | | ||
| + | public static TelephoneNumber[] readTelephoneNumbers(String filename) { | ||
| String firstname, lastname; | String firstname, lastname; | ||
| - | | + | |
| long number; | long number; | ||
| int i=0; | int i=0; | ||
| Line 79: | Line 91: | ||
| numbers[i++] = new TelephoneNumber(firstname+" | numbers[i++] = new TelephoneNumber(firstname+" | ||
| } | } | ||
| + | | ||
| } catch(InputMismatchException ex) { | } catch(InputMismatchException ex) { | ||
| System.out.println(" | System.out.println(" | ||
| Line 84: | Line 97: | ||
| System.out.println(" | System.out.println(" | ||
| } | } | ||
| - | | + | |
| - | | + | |
| - | System.out.println(telephoneNumber); | + | |
| - | } | + | |
| } | } | ||
| + | | ||
| } | } | ||
| </ | </ | ||
java/util_scanner_class.txt · Last modified: 2021/05/14 15:13 (external edit)
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