[SOLVED] how to run .java file with Geany in puppy linux

p\_/ppy · 01-10-2017, 03:49 AM

In Geany, wrote following code,

Code:

public class HlloWd {

	public static void main(String[] args) {		
		System.out.println("Hello World"); 
	}

}

Document> Set Filetype> Programming Languages> Java Source Code (ticked)
Build> Set Build Commands> Compile> "/mnt/home/PPP/Download/Installer/jdk1.8.0_111/bin/javac" "%d\%f" (filled)
Execute> "/mnt/home/PPP/Download/Installer/jdk1.8.0_111/bin/java" "-classpath" "%d" "%e" (filled)
>OK
click Compile> got err msg:
[err_msg]
“/mnt/home/PPP/Download/Installer/jdk1.8.0_111/bin/javac” “mnt/home/PPP/java\HlloWd.java” (in directory. /mnt/home/PPP/java)
javac: file not found: /mnt/home/PPP/java\HlloWd.java
Usage: javac <options> <source files>
use -help for a lost of possible options
compilation failed.
[/err_msg]
> Help me and thank you all!

pan64 · 01-12-2017, 05:59 AM

there is a \ in the filename (set build command), probably you need to use / instead

p\_/ppy · 02-05-2017, 05:38 AM

I've tried it, but no help. maybe, i need to config according to manual which i've not read yet.

ondoho · 02-05-2017, 06:07 AM

Quote:

Originally Posted by p\_/ppy

I've tried it, but no help.

tried what?
please show us, complete code etc.
please use code tags for code.

p\_/ppy · 02-13-2017, 11:53 AM

Well, i tried it
// at first
Build> Set Build Commands> Compile> "/mnt/home/PPP/Download/Installer/jdk1.8.0_111/bin/javac" "%d\%f" (filled)
//tried changing
Build> Set Build Commands> Compile> "/mnt/home/PPP/Download/Installer/jdk1.8.0_111/bin/javac" "%d/%f" (filled) //"%d/%f" is what i changed

when i tried long ago, i got compilation failed err.
but now i tried n compilation finished successfully. (dunno what the differences)

well, got another problem.
for C++, click Compile (after finished successfully), Build then, Execute
Then in terminal, cd /mnt/home/my/directory
and next line, ./helloWorld.cpp
and there comes the output

but for java, Compile, Build, Execute, got helloWorld.class file
in terminal, the same as for C++,
got "cannot execute binary file"
then how do i see my output?

pan64 · 02-13-2017, 11:57 AM

would be nice to see exactly what have you tried.

Jjanel · 02-14-2017, 01:54 AM

[I'm guessing] You need to 'have' java run it (not the shell).
http://stackoverflow.com/questions/1...ckage-from-cmd
Not the best link, but I'm not 'into' java/GUI,
so I welcome another LQ'er to explain this better!

**Also, read/study: http://wikipedia.org/wiki/Shebang_(Unix)

Code:

# head -1 MyWorld.class
▒▒▒▒3G

Note that: this/any? .class file is binary, not text, so no #!... first line!

The Unix `file` command/concept comes to mind; here's some .... [junk]
(again, I don't have java installed in this CLI-only VBox VirtualMachine)

[CODE]
root@trisquel:~# find / -xdev -name \*.class | head -1
/usr/share/nmap/nselib/data/jdwp-class/JDWPExecCmd.class
root@trisquel:~# cp /usr/share/nmap/nselib/data/jdwp-class/JDWPExecCmd.class MyWorld.class
root@trisquel:~#
root@trisquel:~# chmod 755 MyWorld.class #<<<NOT needed/appropriate; just to demo error here!
root@trisquel:~# ./MyWorld.class
bash: ./MyWorld.class: cannot execute binary file: Exec format error
root@trisquel:~#
root@trisquel:~# file MyWorld.class
MyWorld.class: compiled Java class data, version 51.0
root@trisquel:~# file /bin/ls
/bin/ls: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.24, BuildID[sha1]=cecbb9e27978d91bc6fe2cc4d46d0cd58deafdb2, stripped
root@trisquel:~# file `which update-grub`
/usr/sbin/update-grub: POSIX shell script, ASCII text executable
root@trisquel:~#
[/CODE]

p.s. does Linux 'know' how to run a .cpp file?

Code:

./helloWorld.cpp

Yes? Cool!

No? I wonder what **exactly** OP p\_/ppy did...

p.p.s. PLEASE use: CODE ...YourStuff... /CODE 'tags' (note the square-brackets!)
Looks a **lot** nicer, yes? (you can use the 'Edit' button, to fix your posts)

Code:

root@trisquel:~# find / -xdev -name \*.class | head -1 
/usr/share/nmap/nselib/data/jdwp-class/JDWPExecCmd.class 
root@trisquel:~# cp /usr/share/nmap/nselib/data/jdwp-class/JDWPExecCmd.class MyWorld.class 
root@trisquel:~# 
root@trisquel:~# chmod 755 MyWorld.class #<<<NOT needed/appropriate; just to demo error here!
root@trisquel:~# ./MyWorld.class 
bash: ./MyWorld.class: cannot execute binary file: Exec format error 
root@trisquel:~# 
root@trisquel:~# file MyWorld.class 
MyWorld.class: compiled Java class data, version 51.0 
root@trisquel:~# file /bin/ls  
/bin/ls: ELF 32-bit LSB  executable, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.24, BuildID[sha1]=cecbb9e27978d91bc6fe2cc4d46d0cd58deafdb2, stripped 
root@trisquel:~# file `which update-grub` 
/usr/sbin/update-grub: POSIX shell script, ASCII text executable 
root@trisquel:~#

p.p.p.s.: My web-research of the day: .pdf c++ java linux run*
Whoa! 955,000links, 500pages each! ...Back in a few years

Or, in a few days: http://horstmann.com/ccc/c_to_java.pdf or this

p\_/ppy · 02-15-2017, 11:30 PM

Ah.. Thanks a lot. Jjanel.

your above link helped me.

Code:

package jj;

public class HlloWd {

	public static void main(String[] args) {		
		System.out.println("Hello World"); 
	}

}

save as HlloWd.java in the directory "/mnt/home/PPP/jj"
well, can't save in java directory or folder.
coz...

Quote:

Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.SecurityException: Prohibited package name: java

will occur
then compile, build, execute
then in terminal,

Code:

cd /mnt/home/PPP

note that we don't go till jj directory

Code:

java jj.HlloWd

got cha

Code:

Hello World