If it doesn't, the reason is almost certainly Once you achieve outcome 1, you can finally attempt to run the program: Problem and dir to see what files are really there. Has the wrong name, or the command prompt is pointing at a different directory It says "error: cannot read: Foo.java".Is incorrect, probably because you mistyped something - note that the case It gives an error message and refers to something in the program.
Use textwrangler for mac on command line code#
Has compiled successfully, and you'll find the compiled code - called HelloWorld.class - in the same directory as your HelloWorld.java file.
Note that the name of the class ("HelloWorld" in this case), the name of the file,Īnd what you type on the command line have to match exactly, including case.Īlternatively, you can type the following which will compile all. Once you have the terminal window open at the correct location, at the command prompt, type: The Terminal will open with the current working directory set to the same location as the file. Where you have a java code file open with TextWrangler, select the menu option "View > Go Here in Terminal". You can navigate to any directory using the command line command "cd" to change the current working directory, but there is a much easier way for TextWrangler users. To run the compiler, we need to make sure the Terminal's current working directory is set to the directory that holds our code file. This should be saved in a file called HelloWorld.java. (yes it looks complicated but it will all be explained in the course). Type the following into your code editor. We strongly recommend you don't use a sophisticated IDE at this stage and instead use a simple dedicated code editor such as TextWrangler.Īs is traditional, the first program we will run will print a simple message to the command line. A Java source program is just plain text, so you need a text editor
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