Difference between Arraylist Vs Vector

Arraylist Vs Vector

• Vector is synchronous but arraylist is asynchronous.

• Vector & Hashtables are introduced in JDK1.0 but Araaylist & HashMaps are introduced in JDK1.2.
• vector is comparatively slow with Arrraylist.
  

When to use what?

• If your data is accessed by multiple threads then go for Vector.
• If your list is a local variable then go for Arraylist blindly.
• If your data is accessed by a single thread then go for Arraylist.