CODEWITHSUNDEEP
javadata-structureslinked-list
Crazymango
Crazymango

Reputation: 111

How concatenate a LinkedList in Java?

I have a LinkedList:

Linkedlist<String> m = new Linkedlist<String>();

and it contains:

m = {"apple", "banana", "pineapple", "orange", "mango"};

My current code is:

string s = "";
for(int i = 0; i < m.size(); i++)
{
  s += a.get(i);
  s += a.get(i);
  s += a.get(i);
  return s;
}

What I expect:

[apple] or [banana, orange] or [apple, pineapple, mango].

But my result is always:

[apple, apple, apple]

What must I do to get the expected output?

Upvotes: 1

Views: 573

Answers (1)

Sergey
Sergey

Reputation: 186

You can output List in different ways.

1) First is closest to your code

LinkedList<String> m = new LinkedList<String>();
m.add("apple");
m.add("banana");
m.add("pineapple");
m.add("orange");
m.add("mango");

StringBuilder s = new StringBuilder();
for(String value : m)
    s.append(value);

System.out.println(s);

Output is (perhaps you would like to format it a bit) 

applebananapineappleorangemango

2) Easiest way, in my opinion, is to connect StringUtils from apache.

System.out.println(StringUtils.join(m, ", "));

Output

apple, banana, pineapple, orange, mango

3) If you need it just for debug, you can simple use toString() from list. So

System.out.println(m.toString());

gives you

[apple, banana, pineapple, orange, mango]

Upvotes: 1

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