When wait(), notify(), notifyall() methods are called does it releases the lock or holds the acquired lock?

1036

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)

2993

What are passing parameters?

1107

Detail about the architecture of web sphere?

856

why java does not support unsigned keyword?

5282

what is mq server?

913

how can you catch multiple exceptions in java?

1027

What is meant by collection in java?

1098

what is the difference between Object Based Language and Object Oriented Language?

1051

If an object is garbage collected, can it become reachable again?

1031

What is spring boot starter tomcat? : Spring Boot

512

What is wlst in web logic?

1206

What are the main components of JDBC ?

1087

explain what is node, node agent and node groups?

808

State the difference between strings and arrays.

1264