In Java, remove empty elements from a list of Strings

Question

In Java, I have an ArrayList of Strings like:

[,Hi, ,How,are,you] 

I want to remove the null and empty elements, how to change it so it is like this:

[Hi,How,are,you] 

Answer 1

List<String> list = new ArrayList<String>(Arrays.asList("", "Hi", null, "How")); System.out.println(list); list.removeAll(Arrays.asList("", null)); System.out.println(list); 

Output:

[, Hi, null, How] [Hi, How] 

Answer 2

Its a very late answer, but you can also use the Collections.singleton:

List<String> list = new ArrayList<String>(Arrays.asList("", "Hi", null, "How")); list.removeAll(Collections.singleton(null)); list.removeAll(Collections.singleton(""));