boolean statement

[K]

Why does my boolean statement have an error message next to it in eclipse?

public class boolean1 {

public static void main(String[] args) {
int gumballs;
int kids;
int gumballsPerKid;
boolean eachKidGetsTen;

gumballs = 140;
kids = 15;
gumballsPerKid = gumballs / kids;

System.out.print("True of False? ");
System.out.println("Each kid gets 10 gumballs");
eachKidGetsTen = gumballsPerKid >= 10;
System.out.println("eachKidGetsTen");

}

}

 

[glen herrmannsfeldt]

Why does my boolean statement have an error message next to it in eclipse?

It should be a warning, not an error, but you never use the value
of the variable. Eclipse nicely tells you that you might have
forgotten something.

-- glen

public class boolean1 {

public static void main(String[] args) {
int gumballs;
int kids;
int gumballsPerKid;
boolean eachKidGetsTen;

gumballs = 140;
kids = 15;
gumballsPerKid = gumballs / kids;

System.out.print("True of False? ");
System.out.println("Each kid gets 10 gumballs");
eachKidGetsTen = gumballsPerKid >= 10;
System.out.println("eachKidGetsTen");

 

[Eric Sosman]

Why does my boolean statement have an error message next to it in eclipse?

Probably because the variable `eachKidGetsTen' is not used.
It is given a value, but that value is never therafter consulted.

(For future reference: When you have a question about an
"error message," it is a good idea to quote the exact text of
the message. In this instance I imagine there was no text at
all, but still: Some description of the "error message" would
have been a good idea. As it is, I'm just guessing -- And, as
SH taught us, "It is a capital mistake to theorize before you
have all the evidence." But since I theorize ante-factually
only because you force me to, the offense is not mine but yours.
Off with your head!)

public class boolean1 {

public static void main(String[] args) {
int gumballs;
int kids;
int gumballsPerKid;
boolean eachKidGetsTen;

gumballs = 140;
kids = 15;
gumballsPerKid = gumballs / kids;

System.out.print("True of False? ");
System.out.println("Each kid gets 10 gumballs");
eachKidGetsTen = gumballsPerKid >= 10;
System.out.println("eachKidGetsTen");

If you removed the " marks, I bet it would pacify Eclipse.

 

[K]

Why does my boolean statement have an error message next to it in eclipse?

It should be a warning, not an error, but you never use the value

of the variable. Eclipse nicely tells you that you might have

forgotten something.



-- glen

public class boolean1 {


public static void main(String[] args) {

int gumballs;

int kids;

int gumballsPerKid;

boolean eachKidGetsTen;

gumballs = 140;

kids = 15;

gumballsPerKid = gumballs / kids;

System.out.print("True of False? ");

System.out.println("Each kid gets 10 gumballs");

eachKidGetsTen = gumballsPerKid >= 10;



}

what do you mean? How do you use the value of the variable? how would I fix my code?

 

[Gene Wirchenko]

Probably because the variable `eachKidGetsTen' is not used.
It is given a value, but that value is never therafter consulted.

(Your print statement does not refer to it.)

(For future reference: When you have a question about an
"error message," it is a good idea to quote the exact text of
the message. In this instance I imagine there was no text at
all, but still: Some description of the "error message" would
have been a good idea. As it is, I'm just guessing -- And, as
SH taught us, "It is a capital mistake to theorize before you
have all the evidence." But since I theorize ante-factually
only because you force me to, the offense is not mine but yours.
Off with your head!)

What he said.

public class boolean1 {

public static void main(String[] args) {
int gumballs;
int kids;
int gumballsPerKid;
boolean eachKidGetsTen;

gumballs = 140;
kids = 15;
gumballsPerKid = gumballs / kids;

System.out.print("True of False? ");
System.out.println("Each kid gets 10 gumballs");
eachKidGetsTen = gumballsPerKid >= 10;
System.out.println("eachKidGetsTen");

If you removed the " marks, I bet it would pacify Eclipse.

Specifically,
eachKidGetsTen
and
"eachKidGetsTen"
are two very different things that just happen to resemble each other
textually.

Sincerely,

Gene Wirchenko

 

[K]

Thanks now my program works

 

[Gene Wirchenko]

Thanks now my program works

You are welcome.

Sincerely,

Gene Wirchenko

 

[Lew]

what do you mean? How do you use the value of the variable?
how would I fix my code?

http://docs.oracle.com/javase/tutorial/

 

[Roedy Green]

public class boolean1 {

public static void main(String[] args) {
int gumballs;
int kids;
int gumballsPerKid;
boolean eachKidGetsTen;

Classes should start with a capital letter. See
http://mindprod.com/jgloss/codingconventions.html

eachKidGetsTen needs to be initialised.

 

[Andreas Leitgeb]

what do you mean? How do you use the value of the variable?
how would I fix my code?

Since it's only a warning, you can just run the code and see the
output. My guess is, you'll instantly spot the bug, and smile as
the warning will disappear as a consequence of fixing the bug.

 

[Jeff Higgins]

Thanks now my program works, you may proceed.

 

[Lew]

K wrote, quoted or indirectly quoted someone who said :

public class boolean1 {

public static void main(String[] args) {
int gumballs;
int kids;
int gumballsPerKid;
boolean eachKidGetsTen;

Classes should start with a capital letter. See
http://mindprod.com/jgloss/codingconventions.html

The normative document is the one on the Oracle site.

eachKidGetsTen needs to be initialised.

Two things wrong with that advice. First, as written the program does not
require that the variable be initialized. Second, it is initialized in the
program the OP posted:

In the strict sense, it is not initialized but assigned here, but I take the
liberty of assuming you didn't mean it in the strict sense.

 

[Lew]

Yeah, right?

 

[Robert Klemme]

Why does my boolean statement have an error message next to it in eclipse?

Just a general advice: it usually helps _a lot_ if you include the error you are seeing in your posting. You can even copy and paste it from Eclipse.

http://www.catb.org/~esr/faqs/smart-questions.html

Cheers

robert