How to run a java from another file?

Question

I have seen some java applications which I don't type the command in the shell to run it, but when i click a file, it runs the java application. I have only tried

javac myjava.java
java myjava

Typing this entire command on the shell. Can I make it run when a file is clicked? I am new to Linux. Thanks in advance.

Answer 1

When you run javac myProg.java it creates *.class file. That's the actual executable that runs. The bellow solution allows opening a terminal window and running *.class file.

1. Create a new desktop file

   gedit ~/.local/share/applications/runJava.desktop
   

   with the following contents:

   [Desktop Entry]
   Encoding=UTF-8
   Version=1.0
   Type=Application
   Name=runJava
   Terminal=true
   Exec=bash -c "FILE=%U;cd $(dirname $FILE );java $(basename $FILE .class);$SHELL"
   

   Save the file.

2. Right click on any *.class file, select Properties menu, and change default application to runJava

   

3. When done selecting, close the Properties menu, double click the file. *Remember: only .class files that have main method will run