|
Arraylist
|
Vector
|
Synchronization and Thread-Safe
|
ArrayList is not synchronized.
Synchronization and thread safe means at a time only one
thread can access the code.
|
Vector is synchronized.
|
Performance
|
In comparison ArrayList is fast as it
is non-synchronized.
Thus in ArrayList two or more threads can access the code
at the same time.
|
Vector is slow as it is thread
safe.
Vector is limited to one thread at a time.
|
Automatic Increase in Capacity
|
By default ArrayList size is 10.
It checks whether it reaches the last element then it will create the
new array, copy the new data of last array to new array, then old array is
garbage collected by the Java Virtual Machine (JVM).
|
A Vector defaults to doubling
size of its array.
|
Set Increment Size
|
ArrayList does not define the
increment size.
There is no setSize() method or any other method in
ArrayList which can manually set the increment size.
|
Vector defines the increment size.
public synchronized void
setSize(int i) {
//some code
}
|
Enumerator
|
Other than Hashtable,
Vector is the only other class which uses both Enumeration and Iterator.
|
While ArrayList can only use
Iterator for traversing an ArrayList.
|
|
since the very first version
|
java version 1.2
|
Wednesday 26 August 2015
ArrayList vs. Vector
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