if all user defined constructor of a class made private,can
we create an object of that class?justify your answer with
an example.
Answers were Sorted based on User's Feedback
Answer / mashruk
Yes, we can create an object of that class, but, we cannot
extend it.
| Is This Answer Correct ? | 3 Yes | 1 No |
Answer / sp
Object can be created only within the same class but not in
another class (including sub class)
Eg:
// valid instantiation
public class ClassWithPrivateConstructors {
private ClassWithPrivateConstructors() {
System.out.println("object created");
}
public static void main(String args[]) {
ClassWithPrivateConstructors t = new
ClassWithPrivateConstructors();
}
}
//invalid instantiation - subclass
public class SubClassWithPrivateConstructors extends
ClassWithPrivateConstructors {
public NewClassConstructorTest(String name) {
//implicitly super() constructor in super
class is invoked.
System.out.println("New sub class object created" + name);
}
}
//invalid instantiation - reference class
public class ClassWithPrivateConstructorsTest {
public ClassWithPrivateConstructorsTest() {
ClassWithPrivateConstructors c = new
ClassWithPrivateConstructors();
}
}
| Is This Answer Correct ? | 2 Yes | 0 No |
Write a program in āCā that will accept 10 numbers from the user, sort them & then perform the binary search. The searching number will be arithmetic mean of the 10 numbers accepted from the user. Write the sort() & binSearch() functions for performing the sorting & binary search. Also create display function() for displaying the list. Sort() function will use selection sort and only receive one argument (Single char type)as type of sorting i.e. ascending (a) or descending (d). Display the list after sorting using a display() function. binSearch() function will accept one argument as a number to be search & return null or the index position of that number in the array. display() function is non argument non return type function. It will simply display the list row-wise. Program should use these functions by displaying the appropriate message for found or not found.
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I am haning thousands emails in my send box (which i sended.) Now i want to send all these emails (Total in send box)to other by email. Can i send total emails at one time (Not sending each indivisually) by one comand; Please tell the steps..Thanks.
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DIRECTIONS for questions 8 and 9: Refer to the data below and answer the questions that follow. There are seven chapters in a mathematics book - A, B, C, D, E, F, and G. The instructor has to follow certain rules while teaching them. i. E cannot be taught before B and C. ii. D should be taught before C and G. iii. B cannot be taught before G. iv. F cannot be taught before C, D, and G. v. A should be taught before B is taught and the two should not be taught consecutively. Q8. If only four chapters are taught, which of the following has to be necessarily false? a) The instructor can get away without teaching F. b) The instructor can avoid teaching E. c) The instructor can avoid teaching C. d) The instructor can avoid teaching G. Q9. If only four chapters are to be taught, which of the following is necessarily true? a) A has to be taught. b) D has to be taught. c) B has to be taught. d) C has to be taught. Q8. If only four chapters are taught, which of the following has to be necessarily false? a) The instructor can get away without teaching F. b) The instructor can avoid teaching E. c) The instructor can avoid teaching C. d) The instructor can avoid teaching G. Q9. If only four chapters are to be taught, which of the following is necessarily true? a) A has to be taught. b) D has to be taught. c) B has to be taught. d) C has to be taught.
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