How to build a basic calculator with the skills we have learned so far.
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Java Programming Tutorial – 7 – Building a Basic Calculator
How to build a basic calculator with the skills we have learned so far.
Error : Resourse leak scan never closed
If you put:
System.out.print(fnum);
System.out.print(" + ");
System.out.print(snum);
System.out.print(" = ");
between:
answer = fnum + snum;
and
System.out.println(answer);
you get a nice little calculation like:
7.0 + 3.0 = 10.0
but it craches by me if you use 45.3 or something waith a . and a number
after
keep getting an error on this line:
System.out.println("Enter First Num:");
If you have a problem with for example 34.6 (dot) replace the .(dot) with a
,
I follow this exactly, using the NetBeans IDe 7.4 and I just get a BUILD
SUCCESSFUL but no ability to enter any further data. Anyone help with
suggestions?
press: 8, 4, 9 "Bo which means, hello, calculator"
I copied your code there word for word (as far as I can see) but I didn't
get the extra numbers after the decimal point.
Any, great tutorial, as always.
it bugs to me when i use something behind a . without a . it works
nice(thanks) but with a . it gives a uge error
Why is it that I can't specify "sum = fnum+ snum" right after I write
"double fnum, etc.?"
Um it says " resource leak:'Bucky' is never closed" can someone help
*Comment no longer exists* NOOOOOOOOOOOOOOOOOOO
capitalize the s in System in your parameters
I was taught to use (String[] args) too
it worked great !! Thank you Bucky ! I feel so great by designing "my own"
little calculator today :))
bucky is the scanner
import java.util.scanner; and Scanner newjava = new Scanner (system.in);
gives errors to me. Some help?
Why is there a leak on line 5? its telling me "Resource leak, bucky is
never closed" I dont know why its not closed, i have the exact same thing
typed
why do you have to type. fnum = bucky.nextDouble(); ? can't it be just fnum
= nextDouble(); ? because that basically says "fnum is.. wait for the
input" ?
ok, it works now thanks.
Your main method has a problem, try to rewrite it or just copy: public
static void main(String[]args) and make sure that all of the instructions
are inside the { }, you must have two like 2 } , one for you method, and
another to close your class
da
I heard of something that seems a little easier on my computer. Instead of
(String args[]) I use (String[] args), and it still works.
Exception in thread "main" java.lang.Error: Unresolved compilation problem:
at Start.main(Start.java:4) I keep on getting this error message. Any help
for this?
Tip for any beginners such as myself: 1. Keep re-doing the codes that bucky
has taught you, and embed it into your brains :). 2. Make a list of all the
tutorials and mark them 0 – 100% of your understanding. 3. Put all the
codes that you have created in order in some form of notepad file, this way
you may refer to it and make notes if necessary. 4. Everyday, make sure
that you go back and see if you remember some of the earlier tutorials.
(This may seem like common sense, but some people …)
Error: Could not find or load main class Userinput i got this can anyone
help
why are the ads for this guys video so interesting to watch :/
I'm on mobile so I can't reply directly. But @kylebies you put arg instead
of args
3,036 Videos yet no picture.
instead of a plus sign you can replace it with subtraction, I wonder if I
can code this into a toolbar for my browser somehow
PLEASE PLEASE PLEASE HELP!!! when I ran the program in eclipse a message
came up saying: Java Virtual Machine Launcher A Java Exception has
occurred. PLEASE PLEASE PLEASE HELP!!!
He said 34.6 and i was like second number should be 54.2… It was 54.2 wtf
Exactly! 😀 I was replying to a comment saying we could use int instead of
double.
use double its the same thing
package kyle; import java.util.Scanner; class dfsg { public static void
main (String arg[]) { Scanner kyle = new Scanner (System.in); double fnum,
snum, awnser; System.out.println("Enter first number: "); fnum =
kyle.nextDouble(); System.out.println("Enter second number: "); snum =
kyle.nextDouble(); awnser = fnum + snum; System.out.println(awnser); } }
Resource leak 'calculator' is never closed. Copied it word for word except
for replacing bucky with calculator and putting calculator.close() fixes
the error but I still get an error running it.
Yea or double, but I was replying to TheDanayn, who said we could use int
instead of double.
to add decimal numbers write float in place of int
If we use int we can't add decimal numbers
What if I wanted the user to choose if it was, addition or subtraction, or
etc.? How would i go about coding that?
…He isnt.
Some tricks for eclipse users: If you wanna' use Sytem.out.println();
simply type syso and then hold control and press space. It auto completes
this. Also, instead of using 'double' you can use 'int' to declare
variables. This way should be a lot faster.
He meant for the tutorial it isnt needed -_-
int won't always work. int stands for integer, meaning no decimals
he does……………