Java Compile Warnings (Eclipse)

Question

I am trying to export the .java file from the Eclipse IDE and turn that into a .jar file so I can make it an executable file, but whenever I export the .java file I always get this warning:

JAR export finished with warnings. See details for additional information.
Exported with compile warnings: Number Grow/src/NumberGrow.java

Where did I go wrong?
https://code.sololearn.com/ctYlWGwCe29s/?ref=app

Answer 1

whats the warning ? it should appear before or after those statements.

Answer 2

Taste

When I export in Eclipse, the warning is as stated: Number Grow/src/NumberGrow.java

That's it. That's the only thing I get. It still exports, but when I make it into a .exe file, the file doesn't open.

Answer 3

the only warning that i could see is Scanner is never closed. but its not really a big problem for a small program, so its kinda okay to ignore the warning.

but the exe part, i'm not sure it might be a different problem

Answer 4

Taste

How would you close Scanner in this case? I'm new to Java, so I'm still learning the ropes for it.

Answer 5

scanner.close();

or use try with resource.
try (Scanner scan=new Scanner(System.in)){
//you still can use scanner like normal here
x=scan.nextLine();
}

Answer 6

Taste

And I just replace the current Scanner code with that?

Answer 7

yes,

Answer 8

Taste

I tried replacing the code, but it didn't work, though it might have been that I replaced it incorrectly.

Answer 9

the warning still appear
or the code didnt work at all ?

Answer 10

Taste

The code didn't work.

Answer 11

try(Scanner sc = new Scanner(System.in)){
int Number = sc.nextInt();
if(Number >= 2) {
System.out.println("Thank you!");
int x = 1;

while(x > 0) {
System.out.println(x);
x++;
}

} else {
System.out.println("Please try again.");
}
}

it should look like this

Answer 12

Taste

That does work, but like with the previous code, sc isn't closed

Answer 13

try with resource will automaticly close it.

Answer 14

Taste

What do you mean by "resource"?

Answer 15

the try(Scanner sc ) thing.
here the scanner is the resource.

Answer 16

Taste

I'm sorry, but I don't understand.

Answer 17

maybe try this one, we just manually close it

Scanner sc = new Scanner(System.in);
int Number = sc.nextInt();
if(Number >= 2) {
System.out.println("Thank you!");
int x = 1;

while(x > 0) {
System.out.println(x);
x++;
}

} else {
System.out.println("Please try again.");
}
sc.close();

Answer 18

Taste

That did work, thank you. However, I still can't get the .exe file to load.

Answer 19

did the jar file work ?

Answer 20

Taste

It did. Or rather, it loaded but now of course it won't open when I test it.