MATICE_CLASS

package testsimerdavzor;

public class Matice {

    private final int[][] pole;

    public Matice(int pocetRadku, int pocetSloupcu) {
        if (pocetRadku >= 0 && pocetSloupcu >= 0) {
            pole = new int[pocetRadku][pocetSloupcu];
        } else {
            pole = null;
            System.out.print("Matici nelze vytvořit. Chybné zadání!");
        }
    }

    public Matice(int pocetRadku) {
        this(pocetRadku, pocetRadku);
    }

    public void naplnMatici(int min, int max) {
        for (int i = 0; i < pole.length; i++) {
            for (int j = 0; j < pole[i].length; j++) {
                pole[i][j] = (int) Math.round(Math.random() * (max - min) + min);
            }
        }
    }

    @Override
    public String toString() {
        StringBuilder str = new StringBuilder();
        for (int i = 0; i < pole.length; i++) {
            for (int j = 0; j < pole[i].length; j++) {
                str.append(String.format("%4d ", pole[i][j]));
            }
            str.append('\n');
        }
        return str.toString();
    }

    public Matice transponujMatici() {
        Matice m = new Matice(this.pole[0].length, this.pole.length);
        for (int i = 0; i < m.pole.length; i++) {
            for (int j = 0; j < m.pole[i].length; j++) {
                m.pole[i][j] = this.pole[j][i];
            }
        }
        return m;
    }

    public int[] hlavniDiagonala() {
        int delka = (this.pole.length < this.pole[0].length) ? this.pole.length : this.pole[0].length;
        int[] poleDiagonala = new int[delka];
        for (int i = 0; i < delka; i++) {
            poleDiagonala[i] = this.pole[i][i];
        }
        return poleDiagonala;
    }

    public int[] vedlejsiDiagonala(){
        int delka = (this.pole.length < this.pole[0].length) ? this.pole.length : this.pole[0].length;
        int[] poleDiagonala = new int[delka];
        for (int i = 0; i < delka; i++) {
            poleDiagonala[i] = this.pole[i][delka - i-1];
        }
        return poleDiagonala;
    }

    public Matice setridSloupec(int sloupec)
    {
        Matice m1 = this;
        for (int i = 0; i < m1.pole.length - 1; i++) { //Cyklus s určitým počtem opakování
            for (int j = 0; j < m1.pole.length - i - 1; j++) { //Cyklus s určitým počtem opakování
                if (m1.pole[j][sloupec] < m1.pole[j + 1][sloupec]) {
                    int tmp = m1.pole[j][sloupec];
                    m1.pole[j][sloupec] = m1.pole[j + 1][sloupec];
                    m1.pole[j + 1][sloupec] = tmp;
                }
            }
        }
        return m1;
    }

    public Matice setridRadek(int radek)
    {
        Matice m1 = this;
        for (int i = 0; i < pole[0].length - 1; i++) {
        for (int j = 0; j < pole[0].length - i - 1; j++) {
            if(pole[radek][j] < pole[radek][j+1]){
                int tmp = pole[radek][j];
                pole[radek][j] = pole[radek][j+1];
                pole[radek][j+1] = tmp;
            }
        }
    }
        return m1;
    }
}