Is it possible to do method overloading and overriding at a
time
Answers were Sorted based on User's Feedback
Yes, Is it possible to do method overloading and overriding at a
time
***********************************************
class A
{
void Add(int x, int y)
{
System.out.println("Hello From Class A" + (x+y));
}
}
class B extends A
{
void Add(int x, int y)
{
System.out.println("Hello From Class B" + (x+y));
}
void Add(double x, double y)
{
System.out.println("Hello From Class B" + (x+y));
}
}
class Test
{
public static void main(String ar[])
{
B acv = new B();
acv.Add(100.0,20.0);
acv.Add(10,20);
}
}
Is This Answer Correct ? | 19 Yes | 0 No |
Answer / rameshreddy
No it is not possible at a time. Method overloading is
possible in the same class is possible. But method
overriding is possible its subclass only possible
Is This Answer Correct ? | 18 Yes | 6 No |
Answer / sathishkumar.m
class A
{
int c;
void add()
{
System.out.println("hai");
}
void add(int b)
{
c=b;
System.out.println("value of b:"+c);
}
}
class B
{
int e;
void add(int d)
{
System.out.println("value of d:"+e);
}
}
class Demo
{
public static void main(String aa[])
{
A o1=new B();
o1.add();
}
}
Is This Answer Correct ? | 0 Yes | 1 No |
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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; } }
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