Give an example of call be reference significance.

0 Answers   Agilent,

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how many ways to create Thread and which one is good? runnable interface ot Thread class?

3 Answers   Satyam,

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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)

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Explain the importance of throwable class and its methods?

0 Answers  

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How will you override default serialization mechanism in java

2 Answers  

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What is deserialization and how do we do deserialization?

3 Answers   Synechron,

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Which is better list or arraylist in java?

0 Answers  

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How do you add an arraylist to an array in java?

0 Answers  

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What is the difference between Integer and int?

10 Answers   Infosys,

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What is the function of log?

0 Answers  

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What is string builder?

0 Answers  

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What is static import in java?

0 Answers  

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