Programiranje u Javi - B grupa

// ZADATAK 1
import java.util.Scanner;

public class Matrica {

    public static void main(String[] args) {
        Scanner ulaz = new Scanner(System.in);
        int M = 0;

        System.out.println("Unesite dimenziju kvadratne matrice (broj mora biti u intervalu između 2 i 6):");
        do  {
            M = ulaz.nextInt();
        } while (M < 3 || M > 5);
        int matrica[][] = new int[M][M];

        System.out.println("Ispunite matricu cijelim brojevima:");
        for(int i = 0; i < M; i++) {
            for(int j = 0; j < M; j++) {
                matrica[i][j] = ulaz.nextInt();
            }
        }

        System.out.println("Brojevi sporedne dijagonale: ");
        for(int i = 0; i < M; i++) {
            for(int j = 0; j < M; j++) {
                if(i + j == M - 1 && matrica[i][j] < matrica[0][0] && matrica[i][j] < matrica[M-1][M-1])
                    System.out.println(matrica[i][j]);
            }
        }

        ulaz.close();
    }

}

//ZADATAK 2
import java.util.Scanner;

public class IspisPrirodnihBrojeva {

    public static void main(String[] args) {
        Scanner ulaz = new Scanner(System.in);
        int N, brojac = 0;

        System.out.println("Unesite prirodni broj N:");
        do {
            N = ulaz.nextInt();
        }while(N < 1);

        System.out.println("Brojevi djeljivi s 5 u unesenom intervalu: ");
        for(int i = 1; i < N; i++) {
            if(i % 5 == 0) {
                if(brojac == 5) return;
                System.out.println(i);
                brojac++;
            }
        }

        ulaz.close();
    }
}

//ZADATAK 3
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;

public class ProvjeraRecenice {
    public static void main(String[] args) {
        Scanner ulaz = new Scanner(System.in);
        String recenica = null;
        int zadnjiIndeks = 0;

        while(true) {
            recenica = ulaz.nextLine();

            if(recenica.equals("STOP"))
                break;

            zadnjiIndeks = recenica.length() - 1;
            if(Character.isLowerCase(recenica.charAt(0))) {
                recenica = recenica.substring(0, 1).toUpperCase() + recenica.substring(1);
            }
            if(recenica.charAt(zadnjiIndeks) != '.') {
                recenica += '.';
            }

            spremiUDatoteku(recenica);
        }

        ulaz.close();
    }

    public static void spremiUDatoteku(String rec) {
        BufferedWriter bw = null;
        FileWriter fw = null;
        try {
            fw = new FileWriter("recenice.txt", true);
            bw = new BufferedWriter(fw);
            bw.write(rec);
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (bw != null)
                    bw.close();
                if (fw != null)
                    fw.close();
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
    }
}

//ZADATAK 4
public class Automobil {
    private int spremnik;
    private double potrosnja;
    private String vrstaGoriva, tip, marka;

    Automobil() {
        spremnik = 0;
        potrosnja = 0.0;
        vrstaGoriva = null;
        tip = null;
        marka = null;
    }

    Automobil(int spremnik, double potrosnja, String vrstaGoriva, String tip, String marka) {
        this.spremnik = spremnik;
        this.potrosnja = potrosnja;
        this.vrstaGoriva = vrstaGoriva;
        this.tip = tip;
        this.marka = marka;
    }

    public int getSpremnik() {
        return spremnik;
    }

    public void setSpremnik(int spremnik) {
        this.spremnik = spremnik;
    }

    public double getPotrosnja() {
        return potrosnja;
    }

    public void setPotrosnja(double potrosnja) {
        this.potrosnja = potrosnja;
    }

    public String getVrstaGoriva() {
        return vrstaGoriva;
    }

    public void setVrstaGoriva(String vrstaGoriva) {
        this.vrstaGoriva = vrstaGoriva;
    }

    public String getTip() {
        return tip;
    }

    public void setTip(String tip) {
        this.tip = tip;
    }

    public String getMarka() {
        return marka;
    }

    public void setMarka(String marka) {
        this.marka = marka;
    }
}

public class Test extends Automobil {
    private double potrosio_goriva, prijeden_put;

    public double getPotrosio_goriva() {
        return potrosio_goriva;
    }

    public void setPotrosio_goriva(double potrosio_goriva) {
        this.potrosio_goriva = potrosio_goriva;
    }

    public double getPrijeden_put() {
        return prijeden_put;
    }

    public void setPrijeden_put(double prijeden_put) {
        this.prijeden_put = prijeden_put;
    }
}
public class Izracun {

    public static void usporedi(Test t1, Test t2) {
        if((t1.getSpremnik()-t1.getPotrosio_goriva()) / (t1.getPrijeden_put() / 100) < (t2.getSpremnik()-t2.getPotrosio_goriva()) / (t2.getPrijeden_put() / 100)) {
            System.out.println("Prvi automobil je stedljiviji.");
        }
        System.out.println("Drugi automobil je stedljiviji.");
    }
}