Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / vivek
map is an interface and hash map is the class which implements the map interface.both map and hash map are unsynchronized...
| Is This Answer Correct ? | 6 Yes | 0 No |
Post New Answer View All Answers
What are abstract classes and anonymous classes?
How hashmap works in java?
How do you sort a set in java?
Is 0 true or is 1 true?
Why main method is static 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)
How to perform merge sort in java?
Explain the importance of import keyword in java?
What does a void function return?
what is the purpose of the runtime class?
Give us the name of the list layoutmanagers in java?
Why can't we override private static methods?
What are the four corner stones of oop?
Which eclipse is best for java?
What is skeleton and stub?
