When we can access the static data member without creating
the object what is the need of the object in java.
Answers were Sorted based on User's Feedback
Answer / avadhut rane
Object is needed to access a non static data member
| Is This Answer Correct ? | 11 Yes | 1 No |
Answer / vijay
U cant call other class method without object.static member
is common for all object.if u want set some values for
specific object then the object is necessary
| Is This Answer Correct ? | 5 Yes | 0 No |
Answer / paras bist
Static data is class level data,while objects contain
values of non static instancs varibles.
diffrent object contains diffrent values of instance
varibles ,
but all object can share same vale of static data.
Class abc{
int i;
int j;
static int x=10;
//-----some more code
}
diffrent object contain diffrent values of i&j,
but all object can share one value of x(ie 10 coz it is
static).
static data is accessed by class name and object also.
| Is This Answer Correct ? | 6 Yes | 1 No |
Answer / viswa
The question is "when we can access the static data member
with out creating object?
To access a static member of data we no need to create an
object, using class name we can access that static data member.
What is the need of the object in java?
Object is required to access the instance variables as well
as instance methods in the class.With out the object we
can't access them.
| Is This Answer Correct ? | 7 Yes | 2 No |
Answer / arun kumar maurya
there is no need to create object for static data member
because they define in class and take memory at load
time.while non static required memory dynamically so object
creation is necessary for that.object is created to
allocate the memory while in the case of static memory
already created.
| Is This Answer Correct ? | 2 Yes | 1 No |
What is object of class in java?
How can we find the actual size of an object on the heap?
When should I use singleton pattern?
Can a class extends itself in java?
Which oo concept is achieved by using overloading and overriding?
What is a local, member and a class variable?
Explain the difference between abstract classes and interfaces in java?
3.2 Consider the following class: public class Point { protected int x, y; public Point(int xx, int yy) { x = xx; y = yy; } public Point() { this(0, 0); } public int getx() { return x; } public int gety() { return y; } public String toString() { return "("+x+", "+y+")"; } } Say you wanted to define a rectangle class that stored its top left corner and its height and width as fields. 3.2.1 Why would it be wrong to make Rectangle inherit from Point (where in fact it would inherit the x and y coordinates for its top left corner and you could just add the height and width as additional fields)? (1) 8 Now consider the following skeleton of the Rectangle class: public class Rectangle { private Point topLeft; private int height, width; public Rectangle(Point tl, int h, int w) { topLeft = tl; height = h; width = w; } public Rectangle() { this(new Point(), 0, 0); } // methods come here } 3.2.2 Explain the no-argument constructor of the Rectangle class given above. 3.2.3 Write methods for the Rectangle class to do the following: • a toString() method that returns a string of the format "top left = (x, y); height = h; width = w " where x, y, h and w are the appropriate integer values. • an above() method that tests whether one rectangle is completely above another (i.e. all y values of the one rectangle are greater than all y values of the other). For example, with the following declarations Rectangle r1 = new Rectangle(); Rectangle r2 = new Rectangle(new Point(2,2), 1, 4); the expression r2.above(r1) should give true, and r2.above (r2) should give false. (You can assume that the height of a rectangle is never negative.) (2) (5)
What will be the default values of all the elements of an array defined as an instance variable?
Where import statement is used in a java program?
Difference between linkedlist and arraylist.
What do you mean by garbage collection used in java?