can I have different values for a variable? [closed]

What you are looking for is a listed type ( enum ). In the example that you put, you can create this enumeration:

public enum Marca
{
    DELL,TOSHIBA,LENOVO
}

And when creating your variable you would use that type:

Marca marcaOrdenador = Marca.DELL;

That way, in marcaOrdenador you could only store one of the three values that you defined in your type Marca .

It's possible, it's a somewhat old design pattern.

First define constants for your values:

final static int DELL=1; //0001
final static int TOSHIBA=2; //0010
final static int LENOVO=4; //0100
final static int ALIENWARE=8; //1000

Then to be able to combine you use bit operators.

for example:

int marca = ALIENWARE | DELL; // 1001

It would indicate an alienware brand and dell at the same time to be a sub-brand.

You can use the same trick to process the values, for example:

public static String obtieneCategoria(int marcaComputadora)
{
  String descripcion;
  if(marcaComputadora & DELL)
  {
   descripcion+="Laptop";
  }
  if(marcaComputadora & ALIENWARE)
  {
   descripcion+=" Gamer";
  }
  return descripcion;
}

And in this way get the "Laptop Gamer" category by sending the function call as

System.out.println(obtieneCategoria(ALIENWARE | DELL));

Addendum: It is recommended to use EnumSet s instead of bit fields, but it is less verbose as well. If you want more info about it, I recommend you read this article in English link .

Your question covers two cases, which are the following:

Example:

int valor = 0;
valor = 1;
valor = 2;

Example:

String[] marcas = new String[3];
marcas[0] = "DELL";
marcas[1] = "HP";
marcas[2] = "MAC";

/*accedes al valor igualmente por el índice*/
String val = marcas[0]; //a la variable val se le asigna el valor que tenía marcas en la posición 1.

Note:

There are more efficient ways to store multiple values in a variable, such as Enums , linked lists or any other type of data collection, but I think the vector would be enough for your problem.

a variable has a value, what you can do is store it in an array and in the positions of this you save the values

public static void main(String [ ] args){
String [ ] variable = new String [3];
variable[0] = dell;
variable[1] = Toshiba;
variable[2] = lenovo;

}