TriangleOOP.java

public class Main {
    
    public static void main(String[] args) {
        
        Triangle triangleOne = new Triangle();
        
        triangleOne.setAb(5);
        triangleOne.setAc(8);
        triangleOne.setBc(10);
        
        System.out.println(triangleOne);
        
        triangleOne.area();
        System.out.println();
        
        Triangle triangleTwo = new Triangle();
        
        triangleTwo.setAb(12);
        triangleTwo.setAc(15);
        triangleTwo.setBc(18);
        
        System.out.println(triangleTwo);
        
        triangleTwo.area();
    }
    
}


public class Triangle {
    
    private int ab;
    private int bc;
    private int ac;

    public Triangle(int ab, int bc, int ac) {
        this.ab = ab;
        this.bc = bc;
        this.ac = ac;
    }
    
    public Triangle() {
        super();
    }

    public int getAb() {
        return ab;
    }

    public void setAb(int ab) {
        this.ab = ab;
    }

    public int getBc() {
        return bc;
    }

    public void setBc(int bc) {
        this.bc = bc;
    }

    public int getAc() {
        return ac;
    }

    public void setAc(int ac) {
        this.ac = ac;
    }
    
    public void area() {
        int halfArea = (ab + bc + ac) / 2;
        int areaOfTriangle = (int) (Math.sqrt(halfArea * (halfArea - ab) * (halfArea - bc) * (halfArea - ac)));
        System.out.println("Area of Triangle = " + areaOfTriangle);
    }

    @Override
    public String toString() {
        return "Triangle{" + "ab = " + ab + ", bc = " + bc + ", ac = " + ac + '}';
    }
    
}