Chapter 5, Using Pre-Built Methods Video Solutions, Introduction to Programming with Java: A Problem Solving Approach

Problem 1

Given these declarations:
double diameter $=3.0$
double perimeter:
Provide a statement that assigns the length of a circle's perimeter to the perimeter variable. Use the diameter variable.

Pammi Eswari

Numerade Educator

01:45

Problem 2

What is the name of the class that contains the abs, min, and round methods?
a) Arithmetic
b) Math
c) Number

Arin Asawa

Numerade Educator

01:45

Problem 3

Provide a statement that assigns positive infinity into a double variable named num.

Ma. Theresa Alin

Numerade Educator

02:56

Problem 4

Provide a statement that converts a string variable named s to a 1 ong and assigns the result to a 1 ong variable named num.

Adriano Chikande

Numerade Educator

02:56

Problem 5

Provide a statement that converts an int variable named num to a string and assigns the result to a String variable named numStr. Use a wrapper class method.

Adriano Chikande

Numerade Educator

00:49

Problem 6

What does the following code fragment print?
System.out.println(Character.isDigit('#'));
System.out.println(Character.isWhitespace('\t'));
System.out.println(Character.toLowerCase('B'));

Ernest Castorena

Numerade Educator

01:47

Given this declaration:
String snyder $=$ "Stick together. InLearn the flowers. InGo light."
Write a Java statement that finds the index of the letter "G' and prints everything in snyder from that point
on. In other words, it prints Go light.

Vysakh M

Numerade Educator

07:19

Problem 8

Write a format string that handles the display of three data items in three columns. The first column should be 20 spaces wide, and it should print a left-aligned string. The second column should be 10 spaces wide, and it should print a right-aligned integer. The third column should be 16 spaces wide, and it should print a right-aligned floating-point number in scientific format with 6 decimal places. Your format string should cause the screen's cursor to move to the next line after printing the third data item.

Reynald Oliveria

Numerade Educator

01:13

Problem 9

Provide a format specifier that handles the display of a floating-point data item. It should print a rounded version of the data item with no decimal places. It should insert grouping separators, and it should use parentheses if the number is negative.

Ernest Castorena

Numerade Educator

05:12