import java.util.Arrays; import java.util.Collections; import java.util.List; public class MainClass { public static void main(String args[]) throws Exception {
List list = Arrays.asList("a","c","b");
Collections.sort(list); for (int i = 0, n = list.size(); i < n; i++) { if (i != 0)
System.out.print(", ");
System.out.print(list.get(i));
}
System.out.println();
}
}