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Methods of Vector

The Vector class also provides the resizable-array implementations of the List interface (similar to the ArrayList class). Some of the Vector methods are:

Add Elements to Vector

  1. add(element) - adds an element to vectors
  2. add(index, element) - adds an element to the specified position
  3. addAll(vector) - adds all elements of a vector to another vector

For example,


\begin{lstlisting} import java.util.Vector; \par class Main { public static voi... ...mammals); System.out.println(''New Vector: '' + animals); } } \end{lstlisting}

Output


\begin{lstlisting} Vector: [Dog, Horse, Cat] New Vector: [Crocodile, Dog, Horse, Cat] \end{lstlisting}

Access Vector Elements

  1. get(index) - returns an element specified by the index
  2. iterator() - returns an iterator object to sequentially access vector elements

For example,


\begin{lstlisting} import java.util.Iterator; import java.util.Vector; \par clas... ...m.out.print(iterate.next()); System.out.print('', ''); } } } \end{lstlisting}

Output


\begin{lstlisting} Element at index 2: Cat Vector: Dog, Horse, Cat, \end{lstlisting}

Remove Vector Elements

  1. remove(index) - removes an element from specified position
  2. removeAll() - removes all the elements
  3. clear() - removes all elements. It is more efficient than removeAll()

For example,


\begin{lstlisting} import java.util.Vector; \par class Main { public static voi... ... System.out.println(''Vector after clear(): '' + animals); } } \end{lstlisting}

Output


\begin{lstlisting} Initial Vector: [Dog, Horse, Cat] Removed Element: Horse New Vector: [Dog, Cat] Vector after clear(): [] \end{lstlisting}