Cannot invoke toString() on the primitive type int

问题

Basically, what I'm trying to do, is get the item ID, and set a price from a ini, basically like: itemid:price but, i cannot simply do item.getId().toString(). I'm trying to get item What can I do to make it a string?

public static void getBuyPrice(Item item) {
    try {
        String itemId = item.getId().toString();
        BufferedReader br = new BufferedReader(new FileReader(new File(
                "./data/prices.ini")));
        String line;
        while ((line = br.readLine()) != null) {
            if (line.equals(itemId)) {
                String[] split = line.split(":");
                item.getDefinitions().setValue(Integer.parseInt(split[1]));
            }
        }
        br.close();
    } catch (Throwable e) {
        System.err.println(e);
    }
}

That is my code, (of course I have the error at item.getId().toString()), What can I do to convert that to a string?

回答1:

Primitive types do not have methods, as they are not objects in Java. You should use the matching class:

Integer.toString(item.getId());

回答2:

String itemId = Integer.toString(item.getId());

回答3:

String itemId = Integer.toString(item.getId());

回答4:

Primitive types (int, double, byte etc..) can't have methods. So use this :

String itemId = String.valueOf(item.getId());

回答5:

Another simple way is to just say "" + myInt, assuming myInt is assigned.

So try:

item.getDefinitions().setValue("" + Integer.parseInt(split[1]));

Of course, you may want to wrap the line in a try/catch in case there are parsing errors or split[1] is null, index out of range, etc.

Alternatively, the method Integer.valueOf(str) will return an Integer object (as opposed to a primitive) which will allow you to directly call the .toString() function.

item.getDefinitions().setValue(Integer.valueOf(split[1]).toString());

I particularly like .valueOf() because it caches many Integer objects.

回答6:

Better:

String itemId = String.valueOf(item.getId());

来源：https://stackoverflow.com/questions/9961892/cannot-invoke-tostring-on-the-primitive-type-int

标签

java

string

integer