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Is there any way to copy or convert a vector to arraylist in Java?
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Performance: ArrayList is faster. Since it is non-synchronized, while vector operations give slower performance since they are synchronized (thread-safe), if one thread works on a vector, it has acquired a lock on it, which forces any other thread wanting to work on it to have to wait until the lock is released.
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.
Vector: Vector is similar to ArrayList but the differences are, it is synchronized and its default initial size is 10 and when the size exceeds its size increases to double of the original size that means the new size will be 20. Vector is the only class other than ArrayList to implement RandomAccess.
Yup - just use the constructor which takes a collection as its parameter:
Vector<String> vector = new Vector<String>(); // (... Populate vector here...) ArrayList<String> list = new ArrayList<String>(vector); Note that it only does a shallow copy.
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