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Start your free trialHyun Yoo
975 PointsWhy is this code not working?
I deleted the line: int lineNumber = 0; Is that wrong? Please help me. Thank you.
public class ConferenceRegistrationAssistant {
/**
* Assists in guiding people to the proper line based on their last name.
*
* @param lastName The person's last name
* @return The line number based on the first letter of lastName
*/
public int getLineNumberFor(String lastName) {
char getFirstLetter = lastName.charAt(0);
if (getFirstLetter => 'A' && getFirstLetter <= 'M') {
lineNumber = 1;
}else {
lineNumber = 2;
}
/*
lineNumber should be set based on the first character of the person's last name
Line 1 - A thru M
Line 2 - N thru Z
*/
return lineNumber;
}
}
public class Example {
public static void main(String[] args) {
/*
IMPORTANT: You can compare characters using <, >. <=, >= and == just like numbers
*/
if ('C' < 'D') {
System.out.println("C comes before D");
}
if ('B' > 'A') {
System.out.println("B comes after A");
}
if ('E' >= 'E') {
System.out.println("E is equal to or comes after E");
}
// This code is here for demonstration purposes only...
ConferenceRegistrationAssistant assistant = new ConferenceRegistrationAssistant();
/*
Remember that there are 2 lines.
Line #1 is for A-M
Line #2 is for N-Z
*/
int lineNumber = 0;
/*
This should set lineNumber to 2 because
The last name is Zimmerman which starts with a Z.
Therefore it is between N-Z
*/
lineNumber = assistant.getLineNumberFor("Zimmerman");
/*
This method call should set lineNumber to 1, because 'A' from "Anderson" is between A-M.
*/
lineNumber = assistant.getLineNumberFor("Anderson");
/*
Likewise Charlie Brown's 'B' is between 'A' and 'M', so lineNumber should be set to 1
*/
lineNumber = assistant.getLineNumberFor("Brown");
}
}
2 Answers
andren
28,558 PointsYour code is pretty much there, there are only two issues:
- Yes removing the line
int lineNumber = 0;
is wrong. That line creates thelineNumber
variable, you can't assign a value to a variable without creating it first, which is what you end up doing in your current code. - In your first
if
statement condition you have written=>
instead of>=
, the order of the symbols matter.
If you restore that line you removed and replace =>
with >=
like this:
public class ConferenceRegistrationAssistant {
/**
* Assists in guiding people to the proper line based on their last name.
*
* @param lastName The person's last name
* @return The line number based on the first letter of lastName
*/
public int getLineNumberFor(String lastName) {
int lineNumber = 0;
char getFirstLetter = lastName.charAt(0);
if (getFirstLetter >= 'A' && getFirstLetter <= 'M') {
lineNumber = 1;
}else {
lineNumber = 2;
}
/*
lineNumber should be set based on the first character of the person's last name
Line 1 - A thru M
Line 2 - N thru Z
*/
return lineNumber;
}
}
Then your code will work.
Hyun Yoo
975 PointsThank you.