I have just started working through 'Teach yourself Java 2 in 21 Days', and I cannot compile the first program. I have tried de-installing and re-installing SDK 1.4.2_07 a number of times but that has not helped. I get the following error message:

'javac' is not recognized as an internal or external command.

I would appreciate any help.

Thanks.

: I have just started working through 'Teach yourself Java 2 in 21 Days', and I cannot compile the first program. I have tried de-installing and re-installing SDK 1.4.2_07 a number of times but that has not helped. I get the following error message:
:
: 'javac' is not recognized as an internal or external command.
:
: I would appreciate any help.
:
: Thanks.
:

See error explanations here:
http://java.sun.com/docs/books/tutorial/getStarted/cupojava/index.html

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

if using MS Win XP -go to my computer ,Enviornment variables and then
type the complete path of javac.exe file in the path section

: if using MS Win XP -go to my computer ,Enviornment variables and then
: type the complete path of javac.exe file in the path section
:
this is the JAVA_HOME in control panel, system, advanced and then env variables. It should be something like this depending on the way u installed it: c:\j2sdk1.4.2_05

: if using MS Win XP -go to my computer ,Enviornment variables and then
: type the complete path of javac.exe file in the path section
:

Thanks. That was the problem. But now I have another problem. I have been running a number of programs from the book, but when I try to run an application with buttons using the pane.add(nameofbutton) command I get the following error:

at javax.swing.JFrame.addImpl(JFrame.java:491)
at java.awt.Container.add(Container.java:307)
at ButtonFrame.<init>(ButtonFrame.java:16)
at ButtonFrame.main(ButtonFrame.java:21)
Exception in thread "main"

Do you have any idea what is the problem.

Thanks

: : if using MS Win XP -go to my computer ,Enviornment variables and then
: : type the complete path of javac.exe file in the path section
: :
:
: Thanks. That was the problem. But now I have another problem. I have been running a number of programs from the book, but when I try to run an application with buttons using the pane.add(nameofbutton) command I get the following error:
:
: at javax.swing.JFrame.addImpl(JFrame.java:491)
: at java.awt.Container.add(Container.java:307)
: at ButtonFrame.<init>(ButtonFrame.java:16)
: at ButtonFrame.main(ButtonFrame.java:21)
: Exception in thread "main"
:
: Do you have any idea what is the problem.
:
: Thanks
:
Have you imported all the packages?

: : : if using MS Win XP -go to my computer ,Enviornment variables and then
: : : type the complete path of javac.exe file in the path section
: : :
: :
: : Thanks. That was the problem. But now I have another problem. I have been running a number of programs from the book, but when I try to run an application with buttons using the pane.add(nameofbutton) command I get the following error:
: :
: : at javax.swing.JFrame.addImpl(JFrame.java:491)
: : at java.awt.Container.add(Container.java:307)
: : at ButtonFrame.<init>(ButtonFrame.java:16)
: : at ButtonFrame.main(ButtonFrame.java:21)
: : Exception in thread "main"
: :
: : Do you have any idea what is the problem.
: :
: : Thanks
: :
: Have you imported all the packages?
:
I downloaded all the SDK for 4.1.2_07. Is there extra software that I need to download?

: : : : if using MS Win XP -go to my computer ,Enviornment variables and then
: : : : type the complete path of javac.exe file in the path section
: : : :
: : :
: : : Thanks. That was the problem. But now I have another problem. I have been running a number of programs from the book, but when I try to run an application with buttons using the pane.add(nameofbutton) command I get the following error:
: : :
: : : at javax.swing.JFrame.addImpl(JFrame.java:491)
: : : at java.awt.Container.add(Container.java:307)
: : : at ButtonFrame.<init>(ButtonFrame.java:16)
: : : at ButtonFrame.main(ButtonFrame.java:21)
: : : Exception in thread "main"
: : :
: : : Do you have any idea what is the problem.
: : :
: : : Thanks
: : :
: : Have you imported all the packages?
: :
: I downloaded all the SDK for 4.1.2_07. Is there extra software that I need to download?
:

No, java needs to know what packages (Think thats what they are called) you are accessing - this means importing the packages.

If you are working from a book then you should see something like

import java.awt.*;

There are alot of different packages you can import so you will have to look into this further.

: : : : : if using MS Win XP -go to my computer ,Enviornment variables and then
: : : : : type the complete path of javac.exe file in the path section
: : : : :
: : : :
: : : : Thanks. That was the problem. But now I have another problem. I have been running a number of programs from the book, but when I try to run an application with buttons using the pane.add(nameofbutton) command I get the following error:
: : : :
: : : : at javax.swing.JFrame.addImpl(JFrame.java:491)
: : : : at java.awt.Container.add(Container.java:307)
: : : : at ButtonFrame.<init>(ButtonFrame.java:16)
: : : : at ButtonFrame.main(ButtonFrame.java:21)
: : : : Exception in thread "main"
: : : :
: : : : Do you have any idea what is the problem.
: : : :
: : : : Thanks
: : : :
: : : Have you imported all the packages?
: : :
: : I downloaded all the SDK for 4.1.2_07. Is there extra software that I need to download?
: :
:
: No, java needs to know what packages (Think thats what they are called) you are accessing - this means importing the packages.
:
: If you are working from a book then you should see something like
:
: import java.awt.*;
:
: There are alot of different packages you can import so you will have to look into this further.
:
:

: : : : : : if using MS Win XP -go to my computer ,Enviornment variables and then
: : : : : : type the complete path of javac.exe file in the path section
: : : : : :
: : : : :
: : : : : Thanks. That was the problem. But now I have another problem. I have been running a number of programs from the book, but when I try to run an application with buttons using the pane.add(nameofbutton) command I get the following error:
: : : : :
: : : : : at javax.swing.JFrame.addImpl(JFrame.java:491)
: : : : : at java.awt.Container.add(Container.java:307)
: : : : : at ButtonFrame.<init>(ButtonFrame.java:16)
: : : : : at ButtonFrame.main(ButtonFrame.java:21)
: : : : : Exception in thread "main"
: : : : :
: : : : : Do you have any idea what is the problem.
: : : : :
: : : : : Thanks
: : : : :
: : : : Have you imported all the packages?
: : : :
: : : I downloaded all the SDK for 4.1.2_07. Is there extra software that I need to download?
: : :
: :
: : No, java needs to know what packages (Think thats what they are called) you are accessing - this means importing the packages.
: :
: : If you are working from a book then you should see something like
: :
: : import java.awt.*;
: :
: : There are alot of different packages you can import so you will have to look into this further.
: :
: :
: Thanks, I found out what the problem was. In the line where I had
add.pane() I needed to have getContentPane().add.pane().

Thanks for your help.
: