Scratch

theprogrammerpro · 2012-09-03 00:41:08

i recently made a java project and couldnt run its jar file in an attempt to find the problem i made another project with this code

:::

Code:

import javax.swing.*;
import java.awt.*;


public class test extends JFrame {
    public test () {
        super("test");
        setSize(100,100);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
        FlowLayout flo = new FlowLayout();
        setLayout(flo);
    
    
    }
    public static void main(String[] args) {
        test eas = new test();
    }
}

i cant run that jar either

plz help

jji7skyline · 2012-09-03 00:46:36

Maybe you don't have JRE installed? tongue

theprogrammerpro · 2012-09-03 01:10:20

i have JRE7

jji7skyline · 2012-09-03 01:15:49

You should have JDK as well.

veggieman001 · 2012-09-03 01:30:06

jji7skyline wrote:
You should have JDK as well.

That shouldn't affect anything if he's just trying to run a JAR though...

theprogrammerpro · 2012-09-03 01:43:02

i have JDK

TRocket · 2012-09-03 03:04:52

what error do you get?

16Skittles · 2012-09-03 08:59:08

You are trying to use test() as a class when test() is a method. Instead of

Code:

test eas = new test()

Just do

Code:

test()

Also, it doesn't seem to loop. If you don't loop, the window will probably just open and close immediately, because the program will end execution. So try a while(true) loop in void main().

Last edited by 16Skittles (2012-09-03 09:01:03)

poopo · 2012-09-03 11:40:03

16Skittles wrote:
You are trying to use test() as a class when test() is a method. Instead of
Code:
test eas = new test()
Just do
Code:
test()
Also, it doesn't seem to loop. If you don't loop, the window will probably just open and close immediately, because the program will end execution. So try a while(true) loop in void main().

test() is a constructor not a method. I see no problems in your code so it is probably just a compiler problem.

16Skittles · 2012-09-03 12:02:44

poopo wrote:
16Skittles wrote:
You are trying to use test() as a class when test() is a method. Instead of
Code:
test eas = new test()
Just do
Code:
test()
Also, it doesn't seem to loop. If you don't loop, the window will probably just open and close immediately, because the program will end execution. So try a while(true) loop in void main().
test() is a constructor not a method. I see no problems in your code so it is probably just a compiler problem.

Ah. Well, if it is in a jar it is a .class file, right? You didn't try to pack a .java file in there, did you? Also do you have the meta-inf stuff there? In most IDEs it is automatically added, but I don't know what your setup is.

theprogrammerpro · 2012-09-03 14:33:35

the program is a .java..how do i change tht

16Skittles · 2012-09-03 14:56:06

theprogrammerpro wrote:
the program is a .java..how do i change tht

There is your first problem. You need to compile it into a .class file using the java compiler. In command line, type

Code:

javac theProgramName.java

Where "theProgramName" is the name of your .java file (it is case sensitive as well, so if you named the file "HelloWorld.java" and in the console typed "helloworld.java" it would not work.

theprogrammerpro · 2012-09-03 15:16:21

16Skittles wrote:
theprogrammerpro wrote:
the program is a .java..how do i change tht
There is your first problem. You need to compile it into a .class file using the java compiler. In command line, type
Code:
javac theProgramName.java
Where "theProgramName" is the name of your .java file (it is case sensitive as well, so if you named the file "HelloWorld.java" and in the console typed "helloworld.java" it would not work.

done still not working

theprogrammerpro · 2012-09-03 15:53:13

bump

poopo · 2012-09-03 17:25:11

I have a 1 step process that will solve all your problems:
Get an IDE

theprogrammerpro · 2012-09-03 22:07:26

I used netbeans

jji7skyline · 2012-09-03 22:10:25

So now you've compiled it? What is the extension of the file now?

theprogrammerpro · 2012-09-03 22:14:08

I have one .java one . Class and a .jar

16Skittles · 2012-09-03 22:21:48

First try in the command line

Code:

java (nameofyourfile)

Do not add .class at the end of this, it already assumes that it is a .class file. You shouldn't be worrying about a .jar for something this simple.

theprogrammerpro · 2012-09-03 22:31:30

16Skittles wrote:
First try in the command line
Code:
java (nameofyourfile)
Do not add .class at the end of this, it already assumes that it is a .class file. You shouldn't be worrying about a .jar for something this simple.

it says it cant find or load the class file

16Skittles · 2012-09-03 22:47:06

theprogrammerpro wrote:
16Skittles wrote:
First try in the command line
Code:
java (nameofyourfile)
Do not add .class at the end of this, it already assumes that it is a .class file. You shouldn't be worrying about a .jar for something this simple.
it says it cant find or load the class file

oh, make sure you do

Code:

cd (directory name)

so that you are in the correct directory. For example, if the class is at C:\users\theprogrammerpro\java and if cmd starts in C:\users\theprogrammerpro then you would need to do

Code:

cd java

and then do the other code.

theprogrammerpro · 2012-09-03 22:52:41

Same thing my project is in my docs under username so what would be the full code

16Skittles · 2012-09-03 22:59:31

theprogrammerpro wrote:
Same thing my project is in my docs under username so what would be the full code

what is the full directory name? like C:/... I probably can't help you because I'll be leaving for a week but someone else should be able to help you.

Last edited by 16Skittles (2012-09-03 22:59:39)

theprogrammerpro · 2012-09-03 23:05:42

C:\Users\Me\Documents\NetBeansProjects\test\build\classes

16Skittles · 2012-09-04 06:44:45

theprogrammerpro wrote:
C:\Users\Me\Documents\NetBeansProjects\test\build\classes

so try

Code:

cd NetBeansProjects\test\build

Scratch

archived forums

#1 2012-09-03 00:41:08

java problem

Code:

#2 2012-09-03 00:46:36

Re: java problem

#3 2012-09-03 01:10:20

Re: java problem

#4 2012-09-03 01:15:49

Re: java problem

#5 2012-09-03 01:30:06

Re: java problem

jji7skyline wrote:

#6 2012-09-03 01:43:02

Re: java problem

#7 2012-09-03 03:04:52

Re: java problem

#8 2012-09-03 08:59:08

Re: java problem

Code:

Code:

#9 2012-09-03 11:40:03

Re: java problem

16Skittles wrote:

Code:

Code:

#10 2012-09-03 12:02:44

Re: java problem

poopo wrote:

16Skittles wrote:

Code:

Code:

#11 2012-09-03 14:33:35

Re: java problem

#12 2012-09-03 14:56:06

Re: java problem

theprogrammerpro wrote:

Code:

#13 2012-09-03 15:16:21

Re: java problem

16Skittles wrote:

theprogrammerpro wrote:

Code:

#14 2012-09-03 15:53:13

Re: java problem

#15 2012-09-03 17:25:11

Re: java problem

#16 2012-09-03 22:07:26

Re: java problem

#17 2012-09-03 22:10:25

Re: java problem

#18 2012-09-03 22:14:08

Re: java problem

#19 2012-09-03 22:21:48

Re: java problem

Code:

#20 2012-09-03 22:31:30

Re: java problem

16Skittles wrote:

Code:

#21 2012-09-03 22:47:06

Re: java problem

theprogrammerpro wrote:

16Skittles wrote:

Code:

Code:

Code:

#22 2012-09-03 22:52:41

Re: java problem

#23 2012-09-03 22:59:31

Re: java problem

theprogrammerpro wrote:

#24 2012-09-03 23:05:42

Re: java problem

#25 2012-09-04 06:44:45

Re: java problem

theprogrammerpro wrote:

Code:

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