Comp Prog 210 Chapter 9

Front 1

The isDigit, isLetter, and isLetterOrDigit methods are members of what class?

Back 1

Character

Front 2

What method converts a character to uppercase?

Back 2

toUpperCase

Front 3

The startsWith, endsWith, and regionMatched methods are members of what class?

Back 3

String

Front 4

The indexOf and lastIndexOf methods are members of what class?

Back 4

String

Front 5

The substring, getChar, and toCharArray are members of what class?

Back 5

String

Front 6

This String class method performs the same operation as the + operator when used on strings

Back 6

concat

Front 7

The String class has several overloaded versions of a method that accepts a value of any primitive data type as its argument and returns a string representation of the value. What is the name of the method?

Back 7

valueOf

Front 8

If you do not pass an argument to the StringBuilder constructor, the object will have enough memory to store how many characters?

Back 8

16

Front 9

One of the methods that are common to both the String and StringBuilder classes is:

Back 9

length

Front 10

To change the value of a specific character in a StringBuilder object, use what method?

Back 10

setCharAt

Front 11

To delete a specific character in a StringBuilder object, use this method:

Back 11

deleteCharAt

Front 12

The character that separates tokens in a string is known as what?

Back 12

delimiter

Front 13

This String method breaks a string into tokens

Back 13

string.split()

Front 14

These static final variables are members of the numeric wrapper classes and hold the minimum and maximum values for a particular data type.

Back 14

MIN_VALUE and MAX_VALUE

Front 15

True or False: Character testing methods, such as isLetter, accept strings as arguments and test each character in the string.

Back 15

False. They accept characters.

Front 16

True or False: If the toUpperCase method's argument is already uppercase, it is returned as is, with no changes.

Back 16

True

Front 17

True or False: If toLowerCase method's argument is already lowercase, it will be inadvertently converted to uppercase.

Back 17

False. It will stay lowercase

Front 18

True or False: the startsWith and endsWith methods are case-sensitive.

Back 18

True

Front 19

True or False: There are two versions of the regionMatches method: one that is case-sensitive and one that can be case-insensitive.

Back 19

True

Front 20

True or False: The indexOf and lastIndexOf methods can find characters, but cannot find substrings.

Back 20

True

Front 21

True or False: The String class' replace method can replace individual characters, but cannot replace substrings.

Back 21

True

Front 22

True or False: The StringBuilder's replace method can replace individual characters, but cannot replace substrings.

Back 22

False. It can replace substrings by listing the starting index, the ending index, and the string to replace it.

Front 23

True or False: You can use the = operator to assign a string to a StringBuilder object.

Back 23

False. You need to declare it like you would a new object with a one string constructor.

Front 24

What is a wrapper class?

Back 24

A class that is wrapped around a primitive data type and allows you to create objects instead of variables.

Front 25

How is a substring defined?

Back 25

It is a part of another string

Front 26

What is a leading whitespace character. What is a trailing whitespace character?

Back 26

A leading whitespace character is one that appears at the beginning of a string. A trailing whitespace character is one that appears at the end of a string.

Front 27

How is the StringBuilder class different from the String class?

Back 27

The StringBuilder class allows you to change the contents of a StringBuilder object, you can't change the contents of a String object

Front 28

What is the process of of breaking a string into tokens called?

Back 28

tokenizing

Front 29

What is a regular expression?

Back 29

The argument that you pass to the split method. It is a string that specifies a pattern of characters.

Front 30

Why should you trim a string before tokenizing it?

Back 30

To eliminate any whitespace characters from the results of the tokenizing.

Front 31

What is autoboxing?

Back 31

Java's process of automatically "boxing up" a value inside an object.

Front 32

What is unboxing?

Back 32

The process of converting a wrapper class object into a primitive type.