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In a better world, no one would have to use Java anymore. Sadly there are still university programs where people are expected to use Java. Rather than cast people into the world of Eclipse, here are instructions on how to get Xcode building Java. These instructions are current as of Xcode 4.6.2. You will need to download a JDK from somewhere.
This is a basic environment meant only for writing simple school programs. It has no debugger. Replace <MyProject> with whatever you want to name your project. Your main project file, main project class, and Xcode project must use this name. Welcome to Java.
Aug 23, 2018 This wikiHow will teach you how to check what version of Java you have installed on your Mac by checking the System Preferences, using the Java website, or by using your Mac's Terminal. It's the Apple icon in the upper-left of the.
Drag Visual Studio Code.app to the Applications folder, making it available in the macOS Launchpad. Add VS Code to your Dock by right-clicking on the icon to bring up the context menu and choosing Options, Keep in Dock. Launching from the command line. You can also run VS Code from the terminal by typing 'code' after adding it to the path. Compiling and running a Java application on Mac OSX, or any major operating system, is very easy. Apple includes a fully-functional Java runtime and development environment out-of-the-box with OSX, so all you have to do is write a Java program and use the built-in tools to compile and run it.
1) In Xcode, File > New > New Project > Other > External Build System
2) Give it a meaningful name <MyProject> and save it somewhere. Note the name. You'll need that later.
3) File > New > New File > Other > Empty
4) Give it a Java-friendly name. In my example, use <MyProject>.java
5) Copy the contents below into the file and save.
6) File > New > New File > Other > Empty
7) Save as Makefile.
8) Copy the contents below into the file and save.
9) The 'Run' (>) button should at least compile your Java now.
Now it gets tricky. You don't have to do the next part. You could just open a Terminal to your project directory and run java <MyProject> if you want. I strongly suggest that. You can also just type 'make' and use Xcode purely as a text editor.
9) Project > Scheme > Edit Scheme > Debug > Info tab
10) Executable > Other > type ^⌘g > type /usr/bin > choose java
11) Change Debugger to None
12) Arguments tab
13) For Arguments Passed on Launch, add $(TARGETNAME)
14) For Environment Variables, add CLASSPATH with a value of $(PROJECT_DIR)
15) For Expand Variables based on, use <MyProject>
16) Click the 'Run' (>) button.
PS: I have no idea how to run the Java debugger in Xcode. But then, I have no idea how to run the Java debugger at all.
Here are some starter file contents:
HelloWorld.java:
publicclass HelloWorld
{
publicstaticvoid main(String[] args)
{
System.out.println('Hello, World!');
}
}
Makefile:
# A simple makefile for a Hello World Java program
# Define a makefile variable for the java compiler
JCC = javac
# Define a makefile variable for compilation flags
# The -g flag compiles with debugging information
JFLAGS = -g
# typing 'make' will invoke the first target entry in the makefile
# (the default one in this case)
default: $(subst .java,.class,$(wildcard *.java))
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# this target entry builds the Average class
# the Average.class file is dependent on the Average.java file
# and the rule associated with this entry gives the command to create it
#
%.class : %.java
$(JCC) $(JFLAGS) $<
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# To start over from scratch, type 'make clean'.
# Removes all .class files, so that the next make rebuilds them
#
clean:
$(RM) *.class
NOTE: Those indentations are true tab characters. Ugh!
Good luck on your class. Hopefully you can progress onto more complicated projects and eventually use a real language like Objective-C.
'Great tutorial. Thank you for concise directions to get me running with Java on my new iMac.'A.M., May 3, 2010
'Thank you so much for this tutorial! I am new to programming and have never written any code on my mac before now. This was very helpful!'M.A., August 29, 2010
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'This is exactly the information I was looking for!! Great job explaining how to use the Jar Bundler. I always wondered how to group my files into a single 'app' file.'J.L.M., July 6, 2007
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