TRIANGLE

<----MAIN PROGRAMM---->
package vrnkv6;

import java.util.ArrayList;
import java.util.Random;
import java.util.Scanner;


public class VRNKV6 {

    public static void main(String[] args) {
     Scanner scanner = new Scanner(System.in);
     int N = scanner.nextInt();
     ArrayList<Triangle> list = new ArrayList<>();
     Random rand = new Random();

      for(int i=0;i<N;i++){
       Triangle trngl = new Triangle(

            rand.nextInt(10),
            rand.nextInt(10),
            rand.nextInt(10),
            rand.nextInt(10),
            rand.nextInt(10),
            rand.nextInt(10));

            list.add(trngl);
            }

            for(Triangle item:list){
            System.out.println("--------------------------\n");
            System.out.println("Сторона AB = " + item.getSideAB() + " ; " +
                               "Cторона BC = " + item.getSideBC() + " ; " +
                               "Cторона AC = " + item.getSideAC()
                              );
            if (item.getTrnglVerif()== true){
            System.out.println("Это треугольник!");
            System.out.println(item.getAngles());
            System.out.println("Периметр = " + item.getPerimeter());
            System.out.println("Площадь = " + item.getArea());
            }
            else{
            System.out.println("Это не треугольник!");
            }
        }
}
}

<----CLASS TRIANGLE---->

package vrnkv6;


public class Triangle {
    private Point A;
    private Point B;
    private Point C;

    public Triangle(Point A, Point B, Point C ) {
        this.A = A;
        this.B = B;
        this.C = C;
    }

    public Triangle(double x1, double y1, double x2,double y2,double x3,double y3)
    {
    this.A = new Point(x1,y1);
    this.B = new Point(x2,y2);
    this.C = new Point(x3,y3);
    }

    public double getSideAB()
    {
        double AB = Math.sqrt(Math.pow((B.getX()- A.getX()),2.0) +
                    Math.pow((B.getY()-A.getY()),2.0));
        return AB;
    }

    public double getSideBC()
    {
        double BC = Math.sqrt(Math.pow((C.getX()- B.getX()),2.0) +
                    Math.pow((C.getY()-B.getY()),2.0));
        return BC;
    }

    public double getSideAC(){

        double AC = Math.sqrt(Math.pow((C.getX()- A.getX()),2.0) +
                    Math.pow((C.getY()-A.getY()),2.0));
        return AC;
    }

    public boolean getTrnglVerif(){

        if(getSideAB() + getSideBC() > getSideAC() && getSideAB() + getSideAC()>
           getSideBC() && getSideBC() + getSideAC() > getSideAB()){

            return true;
        }
        else

            return false;
    }

    public String getAngles(){
        double angA = Math.acos((Math.pow(getSideAB(),2.0) + Math.pow(getSideAC(),2.0) -
                      Math.pow(getSideBC(),2.0)) / (2.0 * getSideAB() * getSideAC()));

        double angB = Math.acos((Math.pow(getSideAB(),2.0) + Math.pow(getSideAC(),2.0) -
                      Math.pow(getSideBC(),2.0)) / (2.0 * getSideAB() * getSideAC()));

        double angC = Math.acos((Math.pow(getSideAB(),2.0) + Math.pow(getSideAC(),2.0) -
                      Math.pow(getSideBC(),2.0)) / (2.0 * getSideAB() * getSideAC()));

        return "Угол А =" + angA + "; Угол B =" + angB + "; Угол C =" + angC + " ";
    }

    public double getPerimeter(){

        double P = getSideAB() + getSideBC() + getSideAC();
        return P;

    }

    public double getArea(){

        double p=getPerimeter()/2;//полупериметр
        double S = Math.sqrt(p *(p - getSideAB()) * (p - getSideBC()) *
                   (p - getSideAC()) ); //Формула Герона
        return S;

    }


    /*@Override
    public String toString(){
    return "Point A("+A.getX()+" ; "+ A.getY()+")\nPoint B("+B.getX()+" ; "+ B.getY()+")\nPoint C("+C.getX()+" ; "+ C.getY()+")";

    }*/


}
<----CLASS POINT---->
package vrnkv6;


public class Point {
    private double x;
    private double y;

    public Point(double x, double y) {
        this.x = x;
        this.y = y;
    }

     public Point() {
        this.x = 0;
        this.y = 0;
    }

    public double getX() {
        return x;
    }

    public double getY() {
        return y;
    }

    public void setX(double x) {
        this.x = x;
    }

    public void setY(double y) {
        this.y = y;
    }
}