13. The following println statement (the entire line) is equivalent to what? Point pl = new Point (); System.out.println(pl); a. System.out.println (toString (pl)); pl.toString(); b. C. d. System.out.println (pl.string()); e. System.out.println (Point.toString()); System.out.println(pl.toString());

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Number 13
Add a new method to the Point class we developed in this chapter:
public double distance (Point other)
Returns the distance between the current Point object and the given other Point object. The distance between two
points is equal to the square root of the sum of the squares of the differences of their x- and y-coordinates. In other
words, the distance between two points (x₁, y₁) and (x₂, y₂) can be expressed as the square root of (x₂
(₂-₁)². Two points with the same (x, y) coordinates should return a distance of 0.0.
x₁ )² +
11. (You must complete Self-Check Problem 7 before answering this question.)
Add two new methods to the Name class:
public String getNormalOrder ()
Returns the person's name in normal order, with the first name followed by the middle initial and last name. For exam-
ple, if the first name is "John", the middle initial is "Q", and the last name is "Public", returns "John Q. Public".
public String getReverseOrder ()
Returns the person's name in reverse order, with the last name preceding the first name and middle initial. For example,
if the first name is "John", the middle initial is "Q", and the last name is "Public", returns "Public, John Q.".
12. How do you write a class whose objects can easily be printed on the console?
13. The following println statement (the entire line) is equivalent to what?
Point pl = new Point();
...
System.out.println (pl);
a. System.out.println(toString(pl));
b. pl.toString();
c. System.out.println (pl.toString());
d. System.out.println(pl.string());
e. System.out.println (Point.toString());
Transcribed Image Text:Add a new method to the Point class we developed in this chapter: public double distance (Point other) Returns the distance between the current Point object and the given other Point object. The distance between two points is equal to the square root of the sum of the squares of the differences of their x- and y-coordinates. In other words, the distance between two points (x₁, y₁) and (x₂, y₂) can be expressed as the square root of (x₂ (₂-₁)². Two points with the same (x, y) coordinates should return a distance of 0.0. x₁ )² + 11. (You must complete Self-Check Problem 7 before answering this question.) Add two new methods to the Name class: public String getNormalOrder () Returns the person's name in normal order, with the first name followed by the middle initial and last name. For exam- ple, if the first name is "John", the middle initial is "Q", and the last name is "Public", returns "John Q. Public". public String getReverseOrder () Returns the person's name in reverse order, with the last name preceding the first name and middle initial. For example, if the first name is "John", the middle initial is "Q", and the last name is "Public", returns "Public, John Q.". 12. How do you write a class whose objects can easily be printed on the console? 13. The following println statement (the entire line) is equivalent to what? Point pl = new Point(); ... System.out.println (pl); a. System.out.println(toString(pl)); b. pl.toString(); c. System.out.println (pl.toString()); d. System.out.println(pl.string()); e. System.out.println (Point.toString());
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