String variable does not change in switch statement. JAVA

Asked Oct 30 '15 at 01:04

Active Oct 30 '15 at 01:04

Viewed 21 times

I'm trying to change a string variable in a switch statement like so:

ArrayList<String> listOfWeightLocations = new ArrayList<String>();
String weight;
ArrayList.add(weight);


Switch (num) {
    case 1:
        weight = "This";
        break;
    case 2:
        weight = "Other.";
        break;
    default:
        weight = "Another Either."
        break;
}

System.out.println(String.valueOf(listOfWeightLocations.get(0));

But it never changes the values. It stays as null.

asked Oct 30 '15 at 01:04

Elgin Beloy

If you mean the object you added to the `ArrayList`, that won't change. The variable `currentState` will, it will contain whatever you assign to it in the `switch` statement. – Cinnam Oct 30 '15 at 01:08
why will the object added to the ArrayList not change, – Elgin Beloy Oct 30 '15 at 01:09
Because Java is pass-by-value. – Sotirios Delimanolis Oct 30 '15 at 01:09
But i thought ArrayList holds object reference not values – Elgin Beloy Oct 30 '15 at 01:10
What do you think an object reference is? – Sotirios Delimanolis Oct 30 '15 at 01:11
a reference to that variable weight, so when i change weight the reference to it changes to. – Elgin Beloy Oct 30 '15 at 01:14
The duplicate explains that that is not the case. Please refresh your page. You'll be able to see the link to it. – Sotirios Delimanolis Oct 30 '15 at 01:15

String variable does not change in switch statement. JAVA

0 Answers0