CODEWITHSUNDEEP
java
user3407452
user3407452

Reputation: 21

Storing multiply objects, or instances in one array index

Is it possible in java to store multiple objects in one array index. For example object1 and object2 which are string variables can be referenced by array[1]. 

String[] text = new String []
text[1]="rabbit" 
text[1]="horse"

So now if I outputted text[1] it would output both strings "rabbit" and "horse".

And is it possible for one object to be reference several array indexs. For example say that object1 = array[1] and array[2].

I'm more interest in the first example. And if they are possible can you please give me an example of this in action.

Upvotes: 0

Views: 71

Answers (4)

tmarwen
tmarwen

Reputation: 16384

So now if I outputted text[1] it would output both strings "rabbit" and "horse".

No this won't work because String is an Object and since java object references can hold only one reference to an object at a time, it won't be possible. So either your text[1] will reference a String with characters rabbit or horse

You have to review your application/method design and you can use some other API Classes which can help achieve your need such as ArrayList

List<List<String>> myList = new ArrayList<ArrayList<String>>();
myList.add(new ArrayList<String>());
myList.get(0).add("rabbit");
myList.get(0).add("horse");

Here you have a list of your chained strings in some index and you can get them by accessing that item.

Upvotes: 0

Benjamin
Benjamin

Reputation: 3448

The way you showed is impossible. text[1] in your example is a reference to exatcly one String object, so you are overriding one reference (to rabbit) with a reference to another String (horse).

Storing two Strings in objects[0]:

Object[] objects = new Object[]{new String[]{"a","b"}, null, null};

Storing two references as two consecutive fields in an array (one object is referenced several array indexes):

Object o = new String("a");
objects[1] = o;
objects[2] = o;

Another solution for you:

Object[] text = new Object[]{new ArrayList<String>(), null, null};
text[0].add("rabbit");
text[0].add("horse");

Upvotes: 1

Niraj Patel
Niraj Patel

Reputation: 2208

No it is not possible to hv multipl ibjects on same index. Second is possible.

Upvotes: 0

fatih tekin
fatih tekin

Reputation: 989

First one you can do with 2 dimensional array like [][] array of string array Second one you can do.just an info, Strings are immutable object once you change they become another object

Upvotes: 0

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