ipalp_matice_FEI2

package izapr_cv07;

import java.util.Locale;

public class Matice {

    private final double[][] pole;
    private final int pocetRadku;
    private final int pocetSloupcu;

    public Matice(final int pocetRadku, final int pocetSloupcu) {
        if (0 < pocetRadku && 0 < pocetSloupcu) {
            this.pole = new double[pocetRadku][pocetSloupcu];
            this.pocetRadku = pocetRadku;
            this.pocetSloupcu = pocetSloupcu;
        } else {
            pole = null;
            this.pocetRadku = 0;
            this.pocetSloupcu = 0;
        }

    }

    public Matice() {
        this(0, 0);
    }

    public String toString(String format) {
        StringBuilder str = new StringBuilder();
        for (int i = 0; i < pocetRadku; i++) {
            for (int j = 0; j < pocetSloupcu; j++) {
                str.append(String.format(
                        Locale.ENGLISH,
                        format, pole[i][j]));
            }
            str.append('\n');
        }
        return str.toString();
    }

    @Override
    public String toString() {
        return this.toString("%06.2f ");
    }

    public int getPocetRadku() {
        return pocetRadku;
    }

    public int getPocetSloupcu() {
        return pocetSloupcu;
    }

    public double[] diagonala(){
        //Lokální proměná
        int delka = (pocetRadku<pocetSloupcu)?pocetRadku:pocetSloupcu; //podmínka zkráceně.
        //Referenční promněná
        double[] poleDiagonala = new double[delka];
       /* if(pocetRadku<pocetSloupcu){
            delka = pocetRadku;
        }else{
            delka = pocetSloupcu;
        }*/
        for (int i = 0; i<delka;i++)
{
            poleDiagonala[i] = this.pole[i][i];
        }
        return poleDiagonala;
    }
    public double[] vedlejsiDiagonala(){
        //Lokální proměná
        int delka = (pocetRadku<pocetSloupcu)?pocetRadku:pocetSloupcu; //podmínka zkráceně.
        //Referenční promněná
        double[] poleDiagonala = new double[delka];
        int y = 0;
        for (int i = 0; i < delka-1; i++) {
            y = delka - i-1;
            poleDiagonala[i] = this.pole[i][y];
        }
        return poleDiagonala;
    }
    public void napln(int min, int max){
        for (int i = 0; i < pocetRadku; i++) {
            for (int j = 0; j < pocetSloupcu; j++) {
                pole[i][j] = Math.round(Math.random()*(max-min) + min);
            }
        }
    }
    public Matice horniNadHlavniDiagonalou(){
            Matice m = new Matice(this.pocetRadku, this.pocetSloupcu);
            for (int i = 0; i < pocetRadku; i++) {
                for (int j = i+1; j < pocetSloupcu; j++) {
                    m.pole[i][j] = this.pole[i][j];
                }
        }

            return m;
    }
    public Matice dolniPodHlavniDiagonalou(){
            Matice m = new Matice(this.pocetRadku, this.pocetSloupcu);
            for (int i = 1; i < pocetRadku; i++) {
                for (int j = 0; j < i; j++) {
                    m.pole[i][j] = this.pole[i][j];
                }
        }

            return m;
    }
    public Matice horniNadVedlejsiDiagonalou(){
            Matice m = new Matice(this.pocetRadku, this.pocetSloupcu);
            for (int i = 0; i < pocetRadku-1; i++) {
                for (int j = 0; j < pocetSloupcu-i-2; j++) {
                    m.pole[i][j] = this.pole[i][j];
                }
        }

            return m;
    }
    public Matice dolniPodVedlejsiDiagonalou(){
        int delka = (pocetRadku<pocetSloupcu)?pocetRadku:pocetSloupcu;
            Matice m = new Matice(this.pocetRadku, this.pocetSloupcu);
            for (int i = 1; i < pocetRadku; i++) {
                for (int j = pocetSloupcu; pocetSloupcu -1 -1<j ; j--) {
                    m.pole[i][j] = this.pole[i][j];
                }
        }

            return m;
    }
}