Mire

MinimoComunMultiplo

package Empresa;

import javax.swing.JOptionPane;

public class MinimoComunMultiplo {
public static void main(String[] args) {
	int a,b,t,t1,x;
	a=Integer.parseInt(JOptionPane.showInputDialog("A"));
	b=Integer.parseInt(JOptionPane.showInputDialog("B"));
	t=1; //constante inicializada para evitar la multiplicidad x cero
	x=2; //constante inicial

	while (x<=a && x<=b)
	{
	while (a%x==0 && b%x==0)
	{
	a=a/x;
	b=b/x;
	t=t*x;
	}
	x++;
	}
	t1=t;
	t=t*a*b;
	System.out.println("El mcm es :" +t);
	System.out.println("El mcd es :" +t1);
	}

	}