The public keyword is an access modifier. If you change the case of main then Java will consider it as a normal method not the main entry point to your program because of which your program may not run. Java is case sensitive so write the word main exactly as I show it here. You can do the same thing using an executable JAR, so the window will stay open you open a console window and type 'javaw -jar Shelf.jar' provided your executable JAR file is called Shelf.jar or just double click on the JAR file from file browser and it's going, but like I said it will close the window as soon as your program is done. Follow the simple steps below to compile and execute any JAVA program online using your favorite browser, without having any setup on your local machine. Program execution begins with the main method. You can run the class file by itself 'javaw Shelf' or possibly 'javaw Shelf.class' this has to be done at a console window and javaw.exe has to be in the path statement of the local machine. You can run the class file by itself 'javaw Shelf' or possibly 'javaw Shelf. This is probably an option in BluJ, but be advised if you make an executable JAR and he has the JRE installed locally, he will run the file alright, but when the program is done, it will exit and close the console window immediately, so he will not be able to sit and look at the result of your program. Result: the output of the program is shown in BlueJвЂ™s terminal window: How do I run a jar file in BlueJ Open your project in BlueJ, and make sure it runs correctly. This is probably an option in BluJ, but be advised if you make an executable JAR and he has the JRE installed locally, he will run the file alright, but when the program is done, it will exit and close the console window immediately, so he will not be able to sit and look at the result of your program.

Also you will need to be in the folder where your Shelf.class file is located. A window will pop up: Left click on OK to run the program. Locate the 'jar' file that is the ACM library and. You can run the class file by itself 'javaw Shelf' or possibly 'javaw Shelf.class' this has to be done at a console window and javaw.exe has to be in the path statement of the local machine. The reason the BlueJ IDE is complaining about the package 'acm.program' is probably because you havent added the acm library to your project yet. This is probably an option in BluJ, but be advised if you make an executable JAR and he has the JRE installed locally, he will run the file alright, but when the program is done, it will exit and close the console window immediately, so he will not be able to sit and look at the result of your program. Your program looks fine at a glance, as you have never said it does not run I will assume that it does. What is BlueJ Which files can BlueJ open Get the answers from the file experts at - we have analyzed thousands of files and apps. Please read our docs at to prevent this moving forward.I have never used BluJ, but use NetBeans all the time-at this point many of the IDE's have executable JAR options. Traditionally, there are two players who will be playing the game, and after performing a вЂtossвЂ™, one chooses. Here is a short explanation by me about Hand Cricket: Hand Cricket is a very famous game among the school kids in India and similar countries. The ones with the '.java' suffix are the only ones with actual code. Traceback (most recent call last): File 'main.py', line 21, in n('_Ra19CiELmHqU1emVKemKhgGU') File '/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/client.py', line 723, in run return future.result() File '/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/client.py', line 702, in runner await self.start( args, **kwargs) File '/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/client.py', line 665, in start await self.login(args, bot=bot) File '/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/client.py', line 511, in login await _login(token.strip(), bot=bot) File '/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/http.py', line 300, in static_login data = await self.request(Route('GET', File '/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/http.py', line 216, in request raise HTTPException(r, data) : 429 Too Many Requests (error code: 0): You are being blocked from accessing our API temporarily due to exceeding our rate limits frequently. I used BlueJ to compile and run these Java programs and I recommend you to do the same.

Bluej program wont run