public class Rectangle {
    public double x1, y1, x2, y2, a, b;
    public Rectangle(double x1, double y1, double x2, double y2, boolean bothCoordinates){
        this.x1= x1;
        this.y1= y1;
        if(bothCoordinates == true){
            this.x2= x2;
            this.y2= y2;
            this.setSides();
        }else{
            this.a= x2;
            this.b= y2;
            this.setPoint();
        }
    }
    public double getField(){
        return a*b;
    }
    public double getCircuit(){
        return 2*a+2*b;
    }
    public void setPoint(){
        this.x2= this.x1+b;
        this.y2= this.y1+a;
    }
    public void setSides(){
        this.a= this.y2-this.y1;
        this.b= this.x2-this.x1;
    }
    public double getdLength(){
        return Math.sqrt(Math.pow(x1-x2,2)+Math.pow(y1-y2,2));
    }
}