Answer Posted / narender_niit

bytecode is the code which is stored in a .class files
which is understandable by jvm ie java virtual
machine ..let me expalin more wen we write a code in
notepad it is converted into byte code which is stored
in .class files taht is executable by jvm to generate the
output..

machine code:machine code is a high level language this is
the code which is understandable by us.that is the output
of the code which is understadable by us..

What is variable and rules of variable?

1011

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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)

2976

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What state does a thread enter when it terminates its processing in java programming?

1029

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Can singleton class be serialized?

946

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Can we convert integer to string in java?

1046

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985

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1111

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What is class and object in java?

996

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Explain the difference between jdk, jre, and jvm?

1038

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What are heap memory and stack memory and what are memory tables.

976

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1072

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Explain static nested classes ?

1106

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Why is stringbuffer not immutable?

1065

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Can we declare a class as abstract without having any abstract method?

992

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How does a cookie work in Servlets?

836

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