You can use TreeSet that automatically order list values:
import java.util.Iterator;
import java.util.TreeSet;
public class TreeSetExample {
public static void main(String[] args) {
System.out.println("Tree Set Example!\n");
TreeSet <String>tree = new TreeSet<String>();
tree.add("aaa");
tree.add("acbbb");
tree.add("aab");
tree.add("c");
tree.add("a");
Iterator iterator;
iterator = tree.iterator();
System.out.print("Tree set data: ");
//Displaying the Tree set data
while (iterator.hasNext()){
System.out.print(iterator.next() + " ");
}
}
}
I lastly add 'a' but last element must be 'c'.