package com.company;

public class Main {

    public static void main(String[] args) {
	    trojkat.jaki(3,4,5);
        trojkat.jaki(4,4,4);
        trojkat.jaki(1,1,10);
	    trojkat t0 = new trojkat(3,4,5);
        trojkat t1 = new trojkat(4,4,4);
        trojkat t2 = new trojkat(1,1,10);
        System.out.println("obwody to : \n" + t0.getobw()+ ", " + t1.getobw() + ", " + t2.getobw());
        System.out.println("pola to : \n" + t0.getP()+ ", " + t1.getP() + ", " + t2.getP());


    }
}




KLASA TRÓJKĄT


package com.company;

import java.util.Arrays;

public class trojkat {
    private double[] tab;
    
    public trojkat(double a, double b, double c) {
        tab = new double[]{a, b, c};
    }

    public double getA() {
        return tab[0];
    }

    public double getB() {
        return tab[1];
    }

    public double getC() {
        return tab[2];
    }
    
    public double getobw() {
        return tab[0]+tab[1]+tab[2];
    }

    public double getP() {
        double p=this.getobw()/2;
        return Math.sqrt(p*(p-tab[0])*(p-tab[1])*(p-tab[2]));
    }

    public static void jaki(double a, double b, double c){
        double []tab={a,b,c};
        Arrays.sort(tab);
        if(tab[2] >= tab[0] + tab[1]) System.out.println("z tych boków nie da się zbudowac trójkąta");
        else {
            if(Math.pow(tab[2],2) == Math.pow(tab[1],2)+Math.pow(tab[0],2)) System.out.println("prosty");
            else if (Math.pow(tab[2],2) < Math.pow(tab[1],2)+Math.pow(tab[0],2)) System.out.println("ostrokątny");
            else if (Math.pow(tab[2],2) > Math.pow(tab[1],2)+Math.pow(tab[0],2)) System.out.println("rozwartokątny");
        }
    }
}