package Lecture7;

public class BeamExample {
    public static void main(String[] args) {
        Beam one= new Beam(20.0);
        double w1= one.getDeflection(1200.0);
        System.out.println("w1: " + w1);
        double w2= one.getDeflection(1200.0, "ft");
        System.out.println("w2: " + w2);
        System.exit(0);
    }
}

class Beam {
    private double L;
    private double E= 30000.0;
    private double I= 1000.0;
    public Beam(double L, double E, double I) {
        this.L= L;
        this.E= E;
        this.I= I;
    }
    public Beam(double L) {
        this.L= L;
    }
    public double getDeflection(double P) {
        return -P*L*L*L/(3.0*E*I);
    }
    public double getDeflection(double P, String u) {
        if (u.equals("ft"))     // no utilice ==
            return -3.3*P*L*L*L/(3.0*E*I);
        else
            return -P*L*L*L/(3.0*E*I);
    }
}