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Difference between ArrayList and Vector
ArrayList and Vector both implements List interface and maintains insertion order.
However, there are many differences between ArrayList and Vector classes that are given below.
| ArrayList | Vector |
|---|---|
| 1) ArrayList is not synchronized. | Vector is synchronized. |
| 2) ArrayList increments 50% of current array size if the number of elements exceeds from its capacity. | Vector increments 100% means doubles the array size if the total number of elements exceeds than its capacity. |
| 3) ArrayList is not a legacy class. It is introduced in JDK 1.2. | Vector is a legacy class. |
| 4) ArrayList is fast because it is non-synchronized. | Vector is slow because it is synchronized, i.e., in a multithreading environment, it holds the other threads in runnable or non-runnable state until current thread releases the lock of the object. |
| 5) ArrayList uses the Iterator interface to traverse the elements. | A Vector can use the Iterator interface or Enumeration interface to traverse the elements. |
Example of Java ArrayList
Let’s see a simple example where we are using ArrayList to store and traverse the elements.
Output:
tutor Michael James Andy
Example of Java Vector
Let’s see a simple example of a Java Vector class that uses the Enumeration interface.
Output:
umesh irfan kumar
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