PismeniIspit

//=================================== ZADATAK 1 =========================================//
public abstract class Matrica {
    private String M[][];
    private int m;

    public abstract void _xo();
    public String[][] getMatrica() {
        return M;
    }

    public void setMatrica(String[][] M) {
        this.M = M;
    }

    public int getM() {
        return m;
    }

    public void setM(int m) {
        this.m = m;
    }
}
//=================================== ZADATAK 2 =========================================//
import java.io.Serializable;

public class Student implements Serializable {
    private int maticnibroj;
    private String ime;
    private String prezime;
    private int[] popisOcjena;

    public Student(int mb, String ime, String prezime, int[] popis) {
        this.maticnibroj = mb;
        this.ime = ime;
        this.prezime = prezime;
        this.popisOcjena = popis;
    }

    public int ucitajMaticniBroj() {
        return maticnibroj;
    }
    public String ucitajIme() {
        return ime;
    }
    public String ucitajPrezime() {
        return prezime;
    }
    public int[] ucitajOcjene() {
        return popisOcjena;
    }
}
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.NoSuchElementException;
import java.util.Scanner;
import java.io.ObjectOutputStream;

public class SpremiUDatoteku {
    private static ObjectOutputStream izlaz;
    public static void main(String[] args) {
        otvoriDatoteku();
        snimiStudente();
        zatvoriDatoteku();
    }

    public static void otvoriDatoteku() {
        try {
            izlaz = new ObjectOutputStream(
            Files.newOutputStream(Paths.get("studenti.ser")));
        }
        catch (IOException IOgreska) {
            System.err.println("Pogreska otvaranja datoteke.");
            System.exit(1);
        }
    }

    public static void snimiStudente() {
        Scanner input = new Scanner(System.in);
        for(int i = 0; i < 2; i ++) {
            try {
                int ocjene[] = new int[5];
                System.out.println("Unesite popis ocjena za 5 kolegija " + (i + 1) + ". studenta:");
                for(int j = 0; j < 5; j++) {
                    ocjene[i] = input.nextInt();
                }
                System.out.println("Unesite maticni broj, ime, prezime" + (i + 1) + ". studenta:");
                Student snimanje = new Student(input.nextInt(), input.next(), input.next(), ocjene);
                izlaz.writeObject(snimanje);
            }
            catch (NoSuchElementException elementgreska) {
                System.err.println("Pogresan unos, pokusajte ponovo.");
                input.nextLine();
            }
            catch (IOException IOgreska) {
                System.err.println("Pogreska pisanja u datoteku.");
                break;
            }
        }
    }

    public static void zatvoriDatoteku() {
        try {
            if (izlaz != null)
            izlaz.close();
        }
        catch (IOException IOgreska) {
            System.err.println("Pogreska zatvaranja datoteke.");
        }
    }
}
import java.io.EOFException;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.nio.file.Files;
import java.nio.file.Paths;

public class UcitavanjeIzDatoteke {
    private static ObjectInputStream ulaz;
    public static void main(String[] args) {
        otvoriDatoteku();
        ucitajStudente();
        zatvoriDatoteku();

    }

    public static void otvoriDatoteku() {
        try {
            ulaz = new ObjectInputStream(Files.newInputStream(Paths.get("studenti.ser")));
        }
        catch (IOException ioException) {
            System.err.println("Pogreska otvaranja datoteke.");
            System.exit(1);
        }
    }

    public static void ucitajStudente() {
        System.out.printf("%-18s%-12s%-12s%-12s%n", "Maticni broj", "Ime", "Prezime", "Popis ocjena");

        try {
            while (true) {
                Student snimi = (Student) ulaz.readObject();
                int popis[] = new int[5];
                popis = snimi.ucitajOcjene();
                System.out.printf("%-18d%-12s%-12s%-2d%-2d%-2d%-2d%-2d%n",
                snimi.ucitajMaticniBroj(), snimi.ucitajIme(), snimi.ucitajPrezime(), popis[0], popis[1], popis[2], popis[3], popis[4]);
            }
        }
        catch (EOFException krajdatoteke) {
            System.out.println("Nema vise studenata.");
        }
        catch (ClassNotFoundException klasanijepronadena) {
            System.err.println("Pogresan tip objekta.");
        }
        catch (IOException IOgreska) {
            System.err.println("Pogreska citanja iz datoteke.");
        }
    }

    public static void zatvoriDatoteku() {
        try {
            if (ulaz != null)
                ulaz.close();
        }
        catch (IOException IOgreska) {
            System.err.println("Pogreska zatvaranja datoteke.");
            System.exit(1);
        }
    }
}
//=================================== ZADATAK 3 =========================================//
public class Brojac extends Thread {
    private int parametar;
    private String ime;
    Brojac(String ime, int param){
        this.ime = ime;
        parametar = param;
    }
    public void run(){
        Thread threadSleep = new Thread();
        if(parametar == 0){
            for(int i = 0; i < 11; i++){
                System.out.println(ime + ": " + i);
                try{
                this.sleep(1000);
                }catch(InterruptedException ie){

                }
            }
        }
        else {
            for(int i = 10; i > -1; i--){
                System.out.println(ime + ": " + i);
                try{
                this.sleep(1000);
                }catch(InterruptedException ie){

                }
            }
        }
    }
}
public class Test {
    public static void main(String[] args){
        Brojac brojac1 = new Brojac("Nit 1", 0);
        brojac1.start();
        Brojac brojac2 = new Brojac("Nit 2", 1);
        brojac2.start();
    }
}