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Hey buddy.. can you please tell me about the use of marker interface? And is there any link between marker interface and factory methods? Thanks in advance.
2 6444Hi, well i am unable to understand that why it is mandatory to have same hashcode, if two objects are same? Thanks in advance.
5 7281Hi buddy, well i got that there is always a default constructor with abstract class. OK. But why not with interface? Thanks in advance.
2 5188hi to all. well can you please tell me that why String class is immutable? Thanks in advance.
5 98351).Is Object class abstract or not? 2).Is main method(public static void main(String args[])low priority thread or high priority thread?
TCS,
3 103221).what is the difference between below examples String s="vijay"; String s=new String("vijay");
12 19564what are the different access specifiers that can be used by interfaces and abstract classes? can anyone give me detailed description on this
11 25071
What is the purpose of a transient variable?
Is empty .java file name a valid source file name?
do I need to use synchronized on setvalue(int)? : Java thread
What loop means?
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)
Can we override constructors in java?
Why can we not override static method?
What is size_t?
Give an example of use of pointers in java class.
What is the use of hashmap in java?
Why java is platform independent? Explain.
What is an object class?
What is difference between Heap and Stack Memory?
What is a marker interface?
What is the common usage of serialization?
