CODEWITHSUNDEEP
javarandomarraylist
user872009
user872009

Reputation: 438

Get last element in arraylist

In the below code, it calls an element exactly once. How can i make it print out "this is the last element in the arraylist" when everything has been removed, and there is only one element remaining. 

ArrayList<String> Responselist = new ArrayList<String>();
Responselist.add(CommentResponse());
Responselist.add(TriviaResponse());
Responselist.add(CriticResponse());
String[] SelectRand = new String [3];

for (int i = 0; i < SelectRand.length; ++i)
{
    int rnd = (int) (Math.random() * Responselist.size());
    SelectRand[i] = Responselist.get(rnd);
    Responselist.remove(rnd);
}

for (String x : SelectRand)
{
    if (!(Responselist.isEmpty()))
    {
        System.out.println(x);
    }
}

Upvotes: 6

Views: 43322

Answers (4)

RNJ
RNJ

Reputation: 15552

Try and stick to conventions in java

instead of 

ArrayList<String> Responselist = new ArrayList<String>();

Then code to an interface rather than a concrete class.

List<String> Responselist = new ArrayList<String>();

Also by standard java variables are camel case so it would be 

List<String> responselist = new ArrayList<String>();

I think the other asnswer are sufficient to answer you original query.

Upvotes: -2

Rene Herget
Rene Herget

Reputation: 1526

You can resolve this with the following if-construct

if(responseList.size() == 1)
{
System.out.println("this is the last element in the arraylist")
}

You should start the variable with a lower case.

Upvotes: 1

klebe85
klebe85

Reputation: 286

You can make a control on the size of the arraylist, id est

if (arraylist.size()==1){
    System.out.println("this is the last element in the arraylist");
}

and if you want to print the last element you can access it as (index=0 in case it is just one element)

arraylist.get(arraylist.size()-1);

Upvotes: 6

Blacklight
Blacklight

Reputation: 3827

This should do it I guess:

if (list.size() == 1) {
  System.out.println(list.get(list.size() - 1)) // or just .get(0) of course...
} else {
  System.out.println("List is empty or bigger than one")
}

Upvotes: 1

Related Questions