Using Classes and Objects - Java Software Solutions: Foundations of Program Design - page 156

EX 3.3 Write a declaration for a String variable called change and ini-

tialize it to the characters stored in another String object called
original with all 'e' characters changed to 'j' .

EX 3.4 What output is produced by the following code fragment?

String m1, m2, m3;
m1 = "Quest for the Holy Grail";
m2 = m1.toLowerCase();
m3 = m1 + " " + m2;
System.out.println (m3.replace('h', 'z'));

EX 3.5 What is the effect of the following import statement?

import java.awt.*;

EX 3.6 Assuming that a Random object has been created called

generator , what is the range of the result of each of the follow-
ing expressions?
a. generator.nextInt(20)
b. generator.nextInt(8) + 1
c. generator.nextInt(45) + 10
d. generator.nextInt(100) − 50

EX 3.7 Write code to declare and instantiate an object of the Random

class (call the object reference variable rand ). Then write a list
of expressions using the nextInt method that generates random
numbers in the following specified ranges, including the end-
points. Use the version of the nextInt method that accepts a
single integer parameter.
a. 0 to 10
b. 0 to 500
c. 1 to 10
d. 1 to 500
e. 25 to 50
f.

10 to 15
EX 3.8 Write an assignment statement that computes the square root of
the sum of num1 and num2 and assigns the result to num3 .
EX 3.9 Write a single statement that computes and prints the absolute
value of total .
EX 3.10 Write code statements to create a DecimalFormat object that
will round a formatted value to four decimal places. Then write
a statement that uses that object to print the value of result ,
properly formatted.

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