java - How can I print a pyramid of *

For example, enter a 5 and show this:

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* * * * *     
  * * *       
    * 

My current code is this:

public static void main(String[] args) {
Scanner in = new Scanner(System.in);

    int num = 4;

    while(num % 2 == 0){

        System.out.println("Introduce un numero impar:");
        num = in.nextInt();


        if (num % 2 == 0){
            System.out.println("Has introducido un numero par");
        }
    }

   for (int numFila = 0; numFila < num; numFila++) {    //filas
        for (int numColumna = 0; numColumna < num*2-1; numColumna++) {   //columnas

            if (numFila <= numColumna){
                System.out.print(" * ");

            }else{
                System.out.print("   ");
            }

        }
        //Salt de línia per començar un altre fila
        System.out.println();
    }
}

And what I can show is the following:

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* * * * * * *   
  * * * * * *    
    * * * * *