Ch k sh correct false 3 what does usertextindexof

Ch k
Sh
Correct
false

3)
What does userText.indexOf(',')
return?
8
4)
What is the index of the last
character in userText?
13
5)
What character does
userText.charAt(userText.length()
- 1) return?
4
6) What does
userText.substring(0, 3) return?
Mar
7)
What does
userText.substring(userText.length()
- 4, userText.length()) return?
2034
A common error is to access an invalid array index, especially exactly one larger than the largest
index. Given userText with size 8, the range of valid indices are 0..7; accessing with index 8 is an
error.
Check
Show answer
The string is not empty. Same as userText.length()
== 0.
Check
Show answer
Correct
8
',' is the 9th character, so its index is 8.
Check
Show answer
Correct
13
There are 14 characters, so the index of the last
character is 13.
Check Show answer
Correct
4
That's one way to get the last character.
Check Show answer
Correct
Mar
String starting with M and ending with r.
Check
Show answer
Correct
2034
That form gets the last 4 characters.
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PARTICIPATION
ACTIVITY
6.8.3: String access.
The charAt(index) method generates an exception if the index is out of range for the string's
size. An exception is a detected runtime error that commonly prints an error message and
terminates the program.
PARTICIPATION
ACTIVITY
6.8.4: Out-of-range string access.
Given userText = "Monday".
1) userText.charAt(userText.length())
yields 'y'.
CHALLENGE
ACTIVITY
6.8.1: Looking for characters.
Write an expression to detect that the ±rst character of userInput matches ±rstLetter.
System . out . print ( name . charAt ( 0 )) ;
System . out . print ( name . charAt ( 1 )) ;
System . out . print ( name . charAt ( 2 )) ;
System . out . println ( name . charAt ( 3 )) ;
75
76
77
78
...
A
m
y
name
k
79
0
1
2
otherVar
Am y
out of range
EXCEPTION
Feedback?