chapter 10

The StringBuilder constructor used in the following statement will

StringBuilder str = new StringBuilder(25);
~~~Give the object, str, 25 bytes of storage and not store anything in them

What will be the value of str after the following statements are executed?

StringBuilder str =
new StringBuilder("We have lived in Chicago, " +
"Trenton, and Atlanta.");
str.replace(17, 24, "Tampa");
~~~~We have lived in Tampa, Trenton, and Atlanta.

What will be the tokens in the following statement?

StringTokenizer strToken = new StringTokenizer("123-456-7890",
"-", true);
~~~123, 456, 7890, and -

If you do not specify delimiters in the StringTokenconstructor, which of the following cannot be a delimiter?
~~~Semicolon

What will be the tokens in the following statement?

String str = "red$green&blue#orange";
String tokens = str.split("[$&#]");

~~~"red", "green", "blue"and "orange"

If a string has more than one character used as a delimiter, we must write a loop to determine the tokens, one for each delimiter character.
~~false

What is the value of str after the following code has been executed?

String str;
String sourceStr = "Hey diddle, diddle, the cat and the fiddle";
str = sourceStr.substring(12,17);
~~~diddl

StringBuilder objects are not immutable.
~~true

What will be the value of matches after the following code has been executed?

boolean matches;
String str1 = "The cow jumped over the moon.";
String str2 = "moon";
matches = str1.endsWith(str2);
~~~false

If str is declared as

String str = "ABCDEFGHI";

what will be returned fromCharacter.toLowerCase(str.charAt(5))?
~~f


The String class’s valueOf() method accepts a string representation as an argument and returns its equivalent integer value.
~~False

What will be the value of loc after the following code is executed?

int loc;
String str = "The cow jumped over the moon.";
loc = str.lastIndexOf("ov", 14);

~~-1

What does the following statement do?

Float number = new Float(8.8);
~~All of the above

To convert the string, str = "285" to an int, use the following statement
~~int x = Integer.parseInt(str);

What will be the value of loc after the following code is executed?

int loc;
String str = "The cow jumped over the moon.";
loc = str.indexOf("ov");
~~. 15

The following statement correctly creates aStringBuilder object.

StringBuilder str = "Caesar Salad";
~~false

What would be the results of executing the following code?

StringBuilder str = new StringBuilder(12);
str.append("The cow");
str.append(" jumped over the ");
str.append("moon.");
~~strbuff would equal "The cow jumped over the moon."


Two ways of concatenating two Strings are
~~Use the concat() method or use the + between the two Strings


The following statement correctly creates aStringBuilder object.

StringBuilder str = "Caesar Salad";

==false

If a string has more than one character used as a delimiter, we must write a loop to determine the tokens, one for each delimiter character.
==flase

What will be printed after the following code is executed?

String str = "abc456";
int m = 0;
while ( m < 6 )
{
if (!Character.isLetter(str.charAt(m)))
System.out.print(
Character.toUpperCase(str.charAt(m)));
m++;
}

==456

Which of the following statements will print the maximum value a double variable may have?
==System.out.println(Double.MAX_VALUE);

To convert the int variable, number to a string, use the following statement.
==String str = Integer.toString(number);

The no-arg constructor for a StringBuilder object gives the object enough storage space to hold this many characters.
=16 characters