How do I remove repeated elements from ArrayList?

Question

I have an ArrayList, and I want to remove repeated strings from it. How can I do this?

Answer 1

LinkedHashSet will do the trick.

String[] arr2 = {"5","1","2","3","3","4","1","2"};
Set set = new LinkedHashSet(Arrays.asList(arr2));
for(String s1 : set)
    System.out.println(s1);

System.out.println( "------------------------" );
String[] arr3 = set.toArray(new String[0]);
for(int i = 0; i < arr3.length; i++)
     System.out.println(arr3[i].toString());

//output: 5,1,2,3,4