How to parse elements of a string and add them into another string

Question

I have a string like this

String[] tokens = {"Word0", "Word1","Word3"};

and then I have an arraylist like this

List<String> a = new ArrayList();
a.add("This will not change");

What I want to do is to be able to create a new arraylist ,b ,that puts these two together such that: Element 0 of b is "Word0 This will not change" Element 1 of b is "Word0 Word1 This will not change" Element 3 of b is "Word0 Word1 Word3 This will not change"

I played around with for loops and tried to somehow concatenate the strings but I couldn't figure it out.

"I played around with for loops and tried to somehow concatenate the strings but I couldn't figure it out." -- consider showing us your attempts. It will help us understand what you may be doing wrong, and gain you a little bit of respect for showing your efforts. — Hovercraft Full Of Eels
– Hovercraft Full Of Eels, Commented Nov 8, 2014 at 0:40
Note that this looks for all the world like you're asking us to solve a homework assignment for you. — Hovercraft Full Of Eels
– Hovercraft Full Of Eels, Commented Nov 8, 2014 at 0:41
Specifically one that appears like it should be solved recursively. Also, please change new ArrayList(); to new ArrayList<>();; raw types are so last millennium. — Elliott Frisch
– Elliott Frisch, Commented Nov 8, 2014 at 0:43

halfer · Accepted Answer · 2017-03-24 14:05:34Z

1

Something like this:

String[] tokens = {"Word0","Word1","Word2"};
ArrayList<String> a = new ArrayList<String>();
a.add("This will not change");

ArrayList<String> b = new ArrayList<String>();
for (int i = 0; i < tokens.length; i++)
{
    String add = "";
    for (int j = 0; j <= i; j++)
    {
        add += tokens[j];
        add += " ";
    }
    b.add( (add + a.get(0)) );
}

This is tested and works.

edited Mar 24, 2017 at 14:05

halfer

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answered Nov 8, 2014 at 1:01

Shadow

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