Interested to Buy Any Domain ? << Click Here >> for more details...
can any one tell me what is advantage of encapsulation
- 2 Answers
- 5739 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / shalini
any programming lang. constitutes of two parts
1. logics 2. data
out of the above two, data is more important coz logics
lost can be rewritten but data once lost can never be
retrieved, hence data is more imp, but in the languages
like C and C++, there is a high chance of loosing the data
coz of the global variable concept, there is a very high
insecurity coz of global variables. So in order to overcum
the disadvantage of global var, encapsulation was
introduced, coz encapsulation eliminates the concepts of
global var, and the entire data is encapsulated at one
place, what u call it as class...hence encapsulation forms
the basis for OOPS concept
| Is This Answer Correct ? | 3 Yes | 2 No |
Answer / phanindra
The Advantage of Encapsulation is we can achieve
Security,Durabilty and Maintainability.
| Is This Answer Correct ? | 2 Yes | 1 No |
What is the use of predicate in java 8?
Compare Mutex and Semaphore in java.
Question 7 [8] Consider the following class and answer the questions below it: public class StackWithGuard extends Stack { public StackWithGuard(int size) { super(size); } synchronized public boolean isEmpty() { return super.isEmpty(); } synchronized public boolean isFull() { return super.isFull(); } synchronized public int getSize() { return super.getSize(); } synchronized public void push(Object obj) { try { while (isFull()) { wait(); } } catch (InterruptedException e) {} super.push(obj); COS2144/102 11 notify(); } synchronized public Object pop() { try { while (isEmpty()) { wait(); } } catch (InterruptedException e) {} Object result = super.pop(); notify(); return result; } public static void main(String args[]) { StackWithGuard stack = new StackWithGuard(5); new Producer(stack, 15).start(); new Consumer(stack, 15).start(); } } Note: The Stack class is provided in the Appendix. Note also: The following questions all refer to the pop() method of the StackWithGuard class given above. 7.1 What does the synchronized keyword ensure for this method? (2) 7.2 Why is a while loop used to test whether the stack is empty? In other words, why wouldn't the following if statement be sufficient? if (isEmpty()) { wait(); } (2) 7.3 Why is the result of popping (provided by the inherited pop() method) stored in a temporary variable? In other words, why wouldn't the following statement be sufficient? return super.pop(); (2) 7.4 Why is the while loop placed in a try-catch structure? (2) Appendix The LinkedQueue class: public class LinkedQueue implements Queue { private Node first, last; private int count; public LinkedQueue() { first = last = null; count =0; } public int size() { return count; } public boolean isEmpty() { return (count == 0); 12 } public void enqueue(Object o) { Node node = new Node(); node.element = o; node.next = null; node.prev = last; if (last != null){ last.next = node; } else { last = first = node; } last = node; count++; } public void dequeue() { if ((first!= null) & (first.next!=null)) { first = first.next; first.prev = null; count--; } else { first = last = null; count--; } } public Object front() { return first; } } class Node { Object element; Node next, prev; } The Stack class: public class Stack { protected Object rep[]; protected int top = -1; protected int size = 0; protected int count = 0; public Stack(int size) { if (size > 0) { this.size = size; rep = new Object[size]; } } public boolean isFull() { return (count == size); } public boolean isEmpty() { return (count == 0); } public int getSize() { return size; } public void push(Object e) { if (e != null && !isFull()) { COS2144/102 13 top++; rep[top] = e; count ++; } } public Object pop() { Object result = null; if (!isEmpty()) { result = rep[top]; top--; count--; } return result; } }
What is string [] java?
How to invoke external process in java.
What is lambda in java?
What is the use of parse function in java?
what is the difference between the "protected and default" modifiers?
What is instanceof keyword?
Define iterator and methods in iterator?
What is the purpose of the enableevents() method in java programming?
What are the types of loops in Java, and how are they used?
Core Java 
