Frazioni e loro stampa: lezione 20-09-2022

Frazione.java

/*
 * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
 * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
 */
package frazioni;

/**
 *
 * @author 15367519
 */
class Frazione {
    private  int num;
    private  int den;

    Frazione(int num, int den) {
       this.num = num;
       this.den = den;
    }
    
    public Frazione reciproco() {
        return new Frazione(den,num);
    }

    @Override
    public String toString() {
        //return "Frazione{" + num + "/" + den + '}';
        return String.format("Frazione{%d/%d}", num,den);
    }
    
    public int getNum() {
        return num;
    }

    public void setNum(int num) {
        this.num = num;
    }

    public int getDen() {
        return den;
    }

    public void setDen(int den) {
        this.den = den;
    }
    
}

Frazioni.java

/*
 * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
 * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Main.java to edit this template
 */
package frazioni;

/**
 *
 * @author 15367519
 */
public class Frazioni {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        //var printer =new StampatoreDiFrazioni();
        Frazione f1 = new Frazione(156622,33333);
        System.out.println(f1);
        System.out.println(f1.reciproco());
        StampatoreDiFrazioni.stampa(f1);
    }
    
}

StampatoreDiFrazioni.java

/*
 * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
 * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
 */
package frazioni;

/**
 *
 * @author 15367519
 */
public class StampatoreDiFrazioni {

    public StampatoreDiFrazioni() {
    }
    
    public static void stampa(Frazione f) {
        var snum = String.valueOf(f.getNum());
        var sden = String.valueOf(f.getDen());
        var n = Math.max(snum.length(),sden.length());
        
        var linea = "";
        for(int i = 0; i<n;i++) {
            linea += "-";
        }
        System.out.println(f.getNum());
        System.out.println(linea);
        System.out.println(f.getDen());
    }
    
}