Add String Arrays in ArrayList

Question

I have an ArrayList defined as:

ArrayList<String[]> params=new ArrayList<String[]>();

It contains parameters ("name", value) in String Arrays. I would like to insert elements in the ArrayList:

params.add({"param1", param1});

But when I try that I get an error.

What is the simplest way to add String Arrays in ArrayList. Do I have to declare a new array each time?

Just pointing that when you say name/value you might want to look at the Map interface — A4L
– A4L, Commented Mar 19, 2014 at 21:51

rgettman · Accepted Answer · 2014-03-19 21:52:18Z

5

A declaration is the only time you can just use braces, e.g.

String[] test = {"param1", param1};

In all other times, you must use new String[] also.

params.add(new String[] {"param1", param1});

answered Mar 19, 2014 at 21:49

rgettman

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Comments

Piscean · Accepted Answer · 2014-03-19 21:54:53Z

1

Make a string with some special sequence. Add it in ArrayList and then split it when you need it. For example:

 ArrayList<String> str_list = new ArrayList<String>();
 String str = "name&&&value";
 // Add str to str_list
 str_list.add(str);

Then fetch it from arraylist and split it using following code:

 String str1 = str_list.get(index); 
 String[] values = str1.split("&&&");

values[0] will be name and values[1] will be value.

answered Mar 19, 2014 at 21:54

Piscean

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jrowe08 · Accepted Answer · 2014-03-19 21:50:22Z

-1

You should read up on ArrayLists here

But after initialization you can do this:

 params.add("String");
 params.add(aStringObject);

Your initialization is incorrect as well; If you want a ArrayList of Strings it should be:

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

answered Mar 19, 2014 at 21:50

jrowe08

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