ChocolatePi wrote:

You should use an IDE rather than compiling java files yourself.

Beside from that, you do not seem to have learned what you already know from a reliable source. There are tons of bad java tutorials out there, and I'd recommend The Java Tutorials, written by the very people who invented Java.

emeralddog wrote:

ChocolatePi wrote:

You should use an IDE rather than compiling java files yourself.

Beside from that, you do not seem to have learned what you already know from a reliable source. There are tons of bad java tutorials out there, and I'd recommend The Java Tutorials, written by the very people who invented Java.

Sounds good, what is an IDE? Do I need to download it? Where do I download it?

ChocolatePi wrote:

emeralddog wrote:

ChocolatePi wrote:

You should use an IDE rather than compiling java files yourself.

Beside from that, you do not seem to have learned what you already know from a reliable source. There are tons of bad java tutorials out there, and I'd recommend The Java Tutorials, written by the very people who invented Java.

Sounds good, what is an IDE? Do I need to download it? Where do I download it?

An IDE means ‘Integrated Development Environment’. It basically means that you just write the code and it runs it for you.

MathWizz wrote:

Just remember, Google is your friend when you need questions like this answered. http://lmgtfy.com/?q=How+to+run+java+written+on+notepad+files%3F

# compile it
javac MyClass.java
# run it
java MyClass

MathWizz wrote:

Just remember, Google is your friend when you need questions like this answered. http://lmgtfy.com/?q=How+to+run+java+written+on+notepad+files%3F

emeralddog wrote:

Ok, this is all quite confusing, I think I will just stick with the tutorials I have been shown.

MegaApuTurkUltra wrote:

I have no idea how to make jars outside of eclipse, but I bet there's a command line tool for that too.

RenataCouncil wrote:

Create a temporary folder C:\mywork. Using Notepad or another text editor, create a small Java file HelloWorld.java
Run Command Prompt (found under All Programs/Accessories in the Start menu).Run Command Prompt (found under All Programs/Accessories in the Start menu). Type
C:\> cd \mywork
This makes C:\mywork the current directory.
C:\mywork> dir
This displays the directory contents. You should see HelloWorld.java among the files.
C:\mywork> set path=%path%;C:\Program Files\Java\jdk1.5.0_09\bin
This tells the system where to find JDK programs.
C:\mywork> javac HelloWorld.java
This runs javac.exe, the compiler. You should see nothing but the next system prompt…
C:\mywork> dir
javac has created the HelloWorld.class file. You should see HelloWorld.java and HelloWorld.class among the files.
C:\mywork> java HelloWorld
This runs the Java interpreter. You should see the program output:

Visit:http://laustan.com/

cd /Users/me/Documents/Java\ Programs/

javac hello_world.java

ls *.class

java hello_world.class

cd /Users/me/Documents/Java\ Programs/ # Change directory to folder containing hello_world.java
javac hello_world.java                 # Compile hello_world.java to hello_world.class
java hello_world.class                 # Run hello_world.class

liam48D wrote:

RenataCouncil wrote:

Create a temporary folder C:\mywork. Using Notepad or another text editor, create a small Java file HelloWorld.java
Run Command Prompt (found under All Programs/Accessories in the Start menu).Run Command Prompt (found under All Programs/Accessories in the Start menu). Type
C:\> cd \mywork
This makes C:\mywork the current directory.
C:\mywork> dir
This displays the directory contents. You should see HelloWorld.java among the files.
C:\mywork> set path=%path%;C:\Program Files\Java\jdk1.5.0_09\bin
This tells the system where to find JDK programs.
C:\mywork> javac HelloWorld.java
This runs javac.exe, the compiler. You should see nothing but the next system prompt…
C:\mywork> dir
javac has created the HelloWorld.class file. You should see HelloWorld.java and HelloWorld.class among the files.
C:\mywork> java HelloWorld
This runs the Java interpreter. You should see the program output:

Visit:http://laustan.com/

This is for Windows - here's a quick tutorial for Mac.

You'll need Java on your computer, I'm assuming you've already gotten that.

Open up Terminal - to do this just press command-space to open up spotlight search, then type in Terminal and open up the app it gives you.

Type in cd with a space after it, then drag in the folder that your .java file is located in. It should look like this:

cd /Users/me/Documents/Java\ Programs/

Then, type in the command to compile a java program - javac, which stands for Java Compile. Type in the name of your java file, including the extension. It should look like this:

javac hello_world.java

To confirm it's working, type in this command:

ls *.class

This lists all files which have the extension .class. If it's there, just type in java (My File).class:

java hello_world.class

Here's the end code:

cd /Users/me/Documents/Java\ Programs/ # Change directory to folder containing hello_world.java
javac hello_world.java                 # Compile hello_world.java to hello_world.class
java hello_world.class                 # Run hello_world.class

java hello_world
# NOT java hello_world.class

RenataCouncil wrote:

Create a temporary folder C:\mywork. Using Notepad or another text editor, create a small Java file HelloWorld.java
Run Command Prompt (found under All Programs/Accessories in the Start menu).Run Command Prompt (found under All Programs/Accessories in the Start menu). Type
C:\> cd \mywork
This makes C:\mywork the current directory.
C:\mywork> dir
This displays the directory contents. You should see HelloWorld.java among the files.
C:\mywork> set path=%path%;C:\Program Files\Java\jdk1.5.0_09\bin
This tells the system where to find JDK programs.
C:\mywork> javac HelloWorld.java
This runs javac.exe, the compiler. You should see nothing but the next system prompt…
C:\mywork> dir
javac has created the HelloWorld.class file. You should see HelloWorld.java and HelloWorld.class among the files.
C:\mywork> java HelloWorld
This runs the Java interpreter. You should see the program output:

Visit:http://laustan.com/

emeralddog wrote:

RenataCouncil wrote:

Create a temporary folder C:\mywork. Using Notepad or another text editor, create a small Java file HelloWorld.java
Run Command Prompt (found under All Programs/Accessories in the Start menu).Run Command Prompt (found under All Programs/Accessories in the Start menu). Type
C:\> cd \mywork
This makes C:\mywork the current directory.
C:\mywork> dir
This displays the directory contents. You should see HelloWorld.java among the files.
C:\mywork> set path=%path%;C:\Program Files\Java\jdk1.5.0_09\bin
This tells the system where to find JDK programs.
C:\mywork> javac HelloWorld.java
This runs javac.exe, the compiler. You should see nothing but the next system prompt…
C:\mywork> dir
javac has created the HelloWorld.class file. You should see HelloWorld.java and HelloWorld.class among the files.
C:\mywork> java HelloWorld
This runs the Java interpreter. You should see the program output:

Visit:http://laustan.com/

I'm seriously confused, please can you explain that again to me, as if I have never even written a word of code in java (which I haven't by the way.) Current directory???

Zeusking19 wrote:

emeralddog wrote:

RenataCouncil wrote:

Create a temporary folder C:\mywork. Using Notepad or another text editor, create a small Java file HelloWorld.java
Run Command Prompt (found under All Programs/Accessories in the Start menu).Run Command Prompt (found under All Programs/Accessories in the Start menu). Type
C:\> cd \mywork
This makes C:\mywork the current directory.
C:\mywork> dir
This displays the directory contents. You should see HelloWorld.java among the files.
C:\mywork> set path=%path%;C:\Program Files\Java\jdk1.5.0_09\bin
This tells the system where to find JDK programs.
C:\mywork> javac HelloWorld.java
This runs javac.exe, the compiler. You should see nothing but the next system prompt…
C:\mywork> dir
javac has created the HelloWorld.class file. You should see HelloWorld.java and HelloWorld.class among the files.
C:\mywork> java HelloWorld
This runs the Java interpreter. You should see the program output:

Visit:http://laustan.com/

I'm seriously confused, please can you explain that again to me, as if I have never even written a word of code in java (which I haven't by the way.) Current directory???

If you are having difficulty with this perhaps you should get an IDE or learn about Command Prompt/Terminal first