Java Array or Vector: What's the Difference?

Arrays and Vectors in Java are quite similar. They both represent a collection of similar items. For example, a good usage of an array would be a variable called states ( as in the United States of America).

String[] states = new String[50];

This is great for a collection of objects or primitive data types with an unchanging number of elements. We know that there are 50 states (I suppose that could change, but in general it is a fixed list). What do we do when we're not sure how many elements will be in our collection?

Use a Vector!

If you want to build a shopping list, you probably won't know how many items will be in the list, so a Vector would be great for this type of variable.

Vector myShoppingList= new Vector();
myShoppingList.addElement("bananas");
myShoppingList.addElement("milk");
myShoppingList.addElement("coffee");

I can keep adding elements to myShoppingList without knowing ahead of time how many items there will be. Thanks to LET Exam Results September 2008 and Nintendo DS Games Free Download.


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