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This Java tip illustrates a method of implementing a Stack. Developer may use stack
for storing elements in a memory. Stack uses First in Last out (FILO). Developer may
need to use push and pop to insert and retrieve data elements from the stack.
LinkedList stack = new LinkedList();
// Push on top of stack
stack.addFirst(object);
// Pop off top of stack
Object o = stack.getFirst();
// In case multiple threads are using a stack
// there is a need to synchronize methods
stack = (LinkedList)Collections.synchronizedList(stack);
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