Java Reference
In-Depth Information
Display 5.9
String Processing with a Method from the Class
Character
(part 2 of 2)
Sample Dialogue
Enter a one line sentence:
is you is OR is you ain't my BABY?
The revised sentence is:
Is you is or is you ain't my baby?
Self-Test Exercises
20. What is the output produced by the following code?
Character characterObject1 =
new
Character('a');
Character characterObject2 =
new
Character('A');
if
(characterObject1.equals(characterObject2))
System.out.println("Objects are equal.");
else
System.out.println("Objects are Not equal.");
21. Suppose
result
is a variable of type
double
that has a value. Write a Java expres-
sion that returns a string that is the normal way of writing the value in
result
.
22. Suppose
stringForm
is a variable of type
String
that names a
String
that is the
normal way of writing some
double
, such as
"41.99"
. Write a Java expression
that returns the
double
value named by
stringForm
.
23. How would you do Exercise 22 if the string might contain leading and/or trail-
ing blanks, such as
" 41.99 "
?
24. Write Java code to output the largest and smallest values of type
long
allowed in Java.
25. How do you create an object of the class
Character
that corresponds to the letter
'Z'
?
26. Does the class
Character
have a no-argument constructor?
5.2
References and Class Parameters
Do not mistake the pointing finger for the moon.
Zen Saying
Variables of a class type and variables of a primitive type behave quite differently in
Java. Variables of a primitive type name their values in a straightforward way. For
