Remove duplicate values from a string in java

Question

Can anyone please let me know how to remove duplicate values from

String s=\"Bangalore-Chennai-NewYork-Bangalore-Chennai\"; 

and output sh

Answer 1

Create array of string by spliting by - and then create a hashSet from it.

String s="Bangalore-Chennai-NewYork-Bangalore-Chennai"; 
String[] strArr = s.split("-");
Set set = new HashSet(Arrays.asList(strArr));

If you want back it as string array then do following:

String[] result = new String[set.size()];
set.toArray(result);

Here is a sample code to do this:

String s="Bangalore-Chennai-NewYork-Bangalore-Chennai"; 
String[] strArr = s.split("-");
Set set = new LinkedHashSet(Arrays.asList(strArr));
String[] result = new String[set.size()];
set.toArray(result);
StringBuilder res = new StringBuilder();
for (int i = 0; i < result.length; i++) {
    String string = result[i];
    if(i==result.length-1)
        res.append(string);
    else
        res.append(string).append("-");
}
System.out.println(res.toString());

Output:-

Bangalore-Chennai-NewYork