Mac Java Error

[Kid Programmer]

Hello. I have been having problems using pico to develop java programs. I used all the commands in a tutorial I read saying open up terminal and type:

cd
mkdir java
cd java
pico

and I type in the code. When I try to save it by pressing Control-O it prompts me for where it to be and it says:

File Name to Write:

I have no idea where to save it so I typed in /Java/. It then says:

File Exists OVERWRITE ?

and when I type in Y it says Error writing /Java/ is a directory. What do I do?

[Nepomuk]

Hello. I have been having problems using pico to develop java programs. I used all the commands in a tutorial I read saying open up terminal and type:

cd
mkdir java
cd java
pico

and I type in the code. When I try to save it by pressing Control-O it prompts me for where it to be and it says:

File Name to Write:

I have no idea where to save it so I typed in /Java/. It then says:

File Exists OVERWRITE ?

and when I type in Y it says Error writing /Java/ is a directory. What do I do?

Type the name of the file. Like

test.java

You can also give the file a name from the beginning by calling

pico test.java

Greetings,
Nepomuk

[Kid Programmer]

Type the name of the file. Like

test.java

You can also give the file a name from the beginning by calling

pico test.java

Greetings,
Nepomuk

It doesn't me type anything in the prompt to overwrite or not except for Y and N.

[Nepomuk]

It doesn't me type anything in the prompt to overwrite or not except for Y and N.

OK, do the following:

1. type cd
2. type mkdir java
3. type cd java
4. type pico
5. write your code
6. press Control-O
7. type test.java
8. press enter
9. It won't prompt you to overwrite you the first time, after that it might. If so, type Y
10. It won't tell you, that it's a directory

The thing is, you were trying to write the file not in the directory but over the directory (replace the directory with the file). That's why it gives you the error.

Greetings,
Nepomuk

[Kid Programmer]

OK, do the following:

1. type cd
2. type mkdir java
3. type cd java
4. type pico
5. write your code
6. press Control-O
7. type test.java
8. press enter
9. It won't prompt you to overwrite you the first time, after that it might. If so, type Y
10. It won't tell you, that it's a directory

The thing is, you were trying to write the file not in the directory but over the directory (replace the directory with the file). That's why it gives you the error.

Greetings,
Nepomuk

Thank you that worked but now I have another problem. When I try to compile it I get this error after typing in cd /Java/. I type in javac test.java and it says
error: cannot read: test.java
1 error

[Laharl]

Is test.java in that folder? If not, you'll need to go to the folder it is in with cd. Capitalization does matter, fyi, so /Java is different from /java.

[Nepomuk]

Thank you that worked but now I have another problem. When I try to compile it I get this error after typing in cd /Java/. I type in javac test.java and it says
error: cannot read: test.java
1 error

OK, so you did cd java (without slashes I would guess)? Then type ls and press enter. It should look something like this:

username@computername:~/java$ ls
test.java
 

(It will probably look a little different, but similar.)
If you don't see test.java you're in the wrong place. If so, find that file.
When you've made sure, you're in the right place, type

javac test.java

again and, if that works, type

java test

to test your program.

Oh, and as Laharl mentioned, "Java" is not the same as "java". You created a folder called "java" in your home directory. (At least if OS X works like Linux - which it should, as OS X is Unix based.) The full path to your program is probably something like

/home/username/java/test.java

Greetings,
Nepomuk

[Kid Programmer]

Is test.java in that folder? If not, you'll need to go to the folder it is in with cd. Capitalization does matter, fyi, so /Java is different from /java.

I am positive it is the right folder.

[Kid Programmer]

I am positive it is the right folder.

I finally got it to work!

[Nepomuk]

I finally got it to work!

Glad, you've got it running. What was the problem?

Greetings,
Nepomuk

[Kid Programmer]

Glad, you've got it running. What was the problem?

Greetings,
Nepomuk

Apparently the files weren't being saved in the folder. I simply dragged the files into the folder and it was able to find them.