PJ Lab 2

// Red
package kolekcije;

public class Red {
    private int kapacitetRed;
    private int brZauzetih;
    private int head;
    private int tail;
    private Object[] nizRed;

    public Red(int n) {
        kapacitetRed = n;
        brZauzetih = 0;
        head = 0;
        tail = -1;
        nizRed = new Object[kapacitetRed];
        for (int i = 0; i < kapacitetRed; i++) {
            nizRed[i] = new Object();
        }
    }

    public void isFull() {
        if (brZauzetih == kapacitetRed)
            System.out.println("Pun je");
        else
            System.out.println("Nije pun");
    }

    public void dodaj(Object l) {
        if (brZauzetih == kapacitetRed) {
            System.out.println("Red je prepun!");
            return;
        }
        if (tail + 1 == kapacitetRed) {
            tail = -1;
        }
        tail++;
        brZauzetih++;
        nizRed[tail] = l;
    }

    public Object izbaci() {
        if (brZauzetih == 0) {
            System.out.println("Red je prazan!");
            return 0;
        }
        Object vrati = nizRed[head];
        if (head + 1 == kapacitetRed) {
            head = -1;
        }
        brZauzetih--;
        head++;
        return vrati;
    }

}

// RacionalanBroj
package brojevi;

import java.util.Scanner;

public class RacionalanBroj {
    private double br;
    private double imen;
    Scanner unesi = new Scanner(System.in);

    public RacionalanBroj() {
        System.out.println("Unesite brojilac i imenilac:");
        br = unesi.nextDouble();
        imen = unesi.nextDouble();
    }

    public String toString() {
        return Double.toString(br) + "/" + Double.toString(imen);
    }
}

// mejn
import kolekcije.*;
import brojevi.*;

public class mejn {

    public static void main(String[] args) {
        Red rCeli = new Red(10);
        for (int i = 0; i < 3; i++) {
            RacionalanBroj x = new RacionalanBroj();
            rCeli.dodaj(x);
        }
        for (int i = 0; i < 3; i++) {
            System.out.println(rCeli.izbaci());
        }
    }
}