This example shows how to iterate through Vector in Java. This example also shows how to iterate through Vector using for loop, iterator, enumeration, ListIterator, and Java 8 forEach.
How to iterate through Vector in Java?
There are several ways using which we can iterate through elements of Vector in Java as given below.
1. Using for loop
The simplest way is to use the for loop to iterate over elements from index 0 to vector size – 1 index and use the Vector get method to get the elements.
|
1 2 3 4 5 6 7 8 9 10 |
Vector<String> vColors = new Vector<String>(); vColors.add("Black"); vColors.add("Orange"); vColors.add("Yellow"); //iterating using for loop for(int i = 0 ; i < vColors.size() ; i++){ System.out.println( vColors.get(i) ); } |
Output
|
1 2 3 |
Black Orange Yellow |
2. Using enhanced for loop
We can also use the enhanced for loop instead of the simple for loop as given below.
|
1 2 3 4 5 6 7 8 9 10 |
Vector<String> vColors = new Vector<String>(); vColors.add("Black"); vColors.add("Orange"); vColors.add("Yellow"); //iterating using the enhanced for loop for(String strColor : vColors){ System.out.println( strColor ); } |
Output
|
1 2 3 |
Black Orange Yellow |
3. Using enumeration
The Vector elements method returns an enumeration of all the elements of this vector object. We can use this enumeration to iterate over elements of Vector using the hasMoreElements and nextElement methods along with the while loop.
|
1 2 3 4 5 6 7 8 9 10 11 12 |
Vector<String> vColors = new Vector<String>(); vColors.add("Black"); vColors.add("Orange"); vColors.add("Yellow"); //get an enumeration Enumeration<String> elements = vColors.elements(); while(elements.hasMoreElements()){ System.out.println( elements.nextElement() ); } |
Output
|
1 2 3 |
Black Orange Yellow |
4. Using Iterator
We can get an iterator over all elements of the vector using the iterator method. Once we get the iterator, we can iterate through it using the hasNext and next methods and the while loop.
|
1 2 3 4 5 6 7 8 9 10 11 12 |
Vector<String> vColors = new Vector<String>(); vColors.add("Black"); vColors.add("Orange"); vColors.add("Yellow"); //get an iterator Iterator<String> iterator = vColors.iterator(); while( iterator.hasNext() ){ System.out.println( iterator.next() ); } |
Output
|
1 2 3 |
Black Orange Yellow |
5. Using ListIterator
We can also get an object of the ListIterator using the listIterator method of the Vector class. Once we get the list iterator, we can iterate it using the hasNext and next methods as given below.
|
1 2 3 4 5 6 7 8 9 10 11 12 |
Vector<String> vColors = new Vector<String>(); vColors.add("Black"); vColors.add("Orange"); vColors.add("Yellow"); //get list iterator ListIterator<String> listIterator = vColors.listIterator(); while( listIterator.hasNext() ){ System.out.println( listIterator.next() ); } |
Output
|
1 2 3 |
Black Orange Yellow |
6. Using forEach (Java 8)
If you are using Java version 8 or later, you can also use the forEach method to iterate over Vector elements as given below.
|
1 2 3 4 5 6 7 8 9 10 |
Vector<String> vColors = new Vector<String>(); vColors.add("Black"); vColors.add("Orange"); vColors.add("Yellow"); //using the forEach (Java 8 and later) vColors.forEach( element -> { System.out.println( element ); }); |
Output
|
1 2 3 |
Black Orange Yellow |
Please also visit how to iterate Vector in reverse order in Java example to know more.
This example is a part of the Vector in Java Tutorial with Examples.
Please let me know your views in the comments section below.
References:
Java 8 Vector Documentation
About the author
- Gson – Serialize HashMap null entries - April 5, 2023
- Gson: Convert String to JsonObject without POJO - April 5, 2023
- Gson – Convert JSON to a Typed ArrayList - April 5, 2023
