Let's draw the loneliness of prime numbers and all the factors of natural numbers analyzed

Here is the code on two files to execute the printing of prime numbers graphically

package disegno;
 import javax.swing.*;
 public class Disegno {
 public static void main(String[] args) { 
 JFrame t= new JFrame("Grafica Iterativa");
 t.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Tela p = new Tela(); t.add(p); t.setSize(1800, 1000); t.setVisible(true);

}
}

Here is the print code

package disegno;
 import java.awt.*;
 import javax.swing.*;
 public class Tela extends JPanel{

public void paintComponent(Graphics g)
 {
 super.paintComponent(g);
 this.setBackground(Color.WHITE);
 g.setColor(Color.BLACK);
 // this following instruction publishes
 // a rectangle in the position 5,5 at the top left
 int n=1; 
 String sn="";
 for (int r=45;r<1000;r=r+41) { for(int i=0;i<1800;i=i+41) { if (IsPrimeFactor(n)>2||IsPrimeFactor(n)==1)
 {g.setColor(Color.BLACK);
 }
 else
 {g.setColor(Color.white);} 

 g.fillRect(i,r,40,40); g.setColor(Color.black); if (IsPrimeFactor(n)==2){ sn=Integer.toString(n);} else{ sn=Integer.toString(IsPrimeFactor(n)); g.setColor(Color.white);} if (IsPrimeFactor(n)>2||IsPrimeFactor(n)==1){ g.drawString(sn, i+10, r+30); g.drawString(Integer.toString(n), i+10, r+10);} else{ g.drawString(sn, i+10, r+15);} n++; } }

}
 public int IsPrime(int n)
 { int primo=1;

 int fattore=2; boolean exit=false; if (n==1) {exit=true;primo=0;} while(fattore<=n/2 && !exit) { if (n%fattore==0) { primo=0; exit=true; } fattore ++; } return primo;

}

public int IsPrimeFactor(int n){
 int x=2,fattori=2;
 if(n!=1){
 while(x<=n/2)
 {if (n%x==0)
 {fattori+=1;}
 x++;}}
 else{fattori=1;}
 return fattori;
 }

}

here is the result

To run the program above, you need to create the disegno project with the main and add the Tela class

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