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 Categories >> Software >> Java Related >> Java J2EE >> Core Java
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Tell me the programme for this @ 1 2 @ @ @ 1 2 3 4    3  275
why static class in java or what is use of static class in java    2  917
What is the life-cycle of an object?    1  1850
How is object created in java?    4  1348
What is an object in Java and what are its benefits?    3  933
What is Difference between Serializable and Externalizable in Java serialization?    1  807
What is difference between compatible and incompatible changes in serialization?    1  697
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How do we make a class serialize?    3  682
Why do we need main method to execute a java program?    1  786
What is difference between overloading and overriding?    2  1098
Describe OOP in java?    2  873
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What is Applet Stub Interface ? 874
What are the differences between Java 1.0 and Java 2.0? 575
Can you give names of Container classes? 863
Tell me about your ability to work under pressure 665
whar are the draw backs of programming lang step by step in Clang and next in C++ and next and in Java nad in .Net 576
which one is more efficient int x; 1. if(x==null) 2.if(null==x) state which one either 1 or 2? 4562
what r advatages of websphere? & how to deploy? 593
why we use merge option in hybernate pls give a ex snippet 546
what is the use of pojo (plain old java objects)? how it is interact with crystal reports? pls urgent 599
when to use ArrayList and when to use HashMap in webApplication. 2156
what is difference betweem home interface and remote interface? 1072
What does those terms actually mean included in the j.d.k i.6? 563
take an array with -ve and +ve value both.find out the nearest value of 0(zero).if two values are same like(-2 and +2)then extract +2 is nearest of 0(zero). 510
What is the exact difference in between Unicast and Multicast object? 482
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) 485
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