Hello, World in Java on Mac OS X
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- Java Program For Matrix Multiplication 3*3
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BlueJ is one of the simplest – the UI is easy to use, and allows you to focus on the code. Error part of the interface is very useful and quickly points out the mistakes you've made so you can fix them easily. A very lightweight and straightforward programs to help you start writing your own code in no time. NetBeans is an open-source code editor tool for developing with Java, PHP, C, and other programming languages. With this editor, code analyzers, and converters. It allows you to upgrade your applications to use new Java 8 language constructs. Platforms: Mac Windows Linux. Features: Easy & Efficient Project Management. Mac OS X 10.7.3 and above: Under System Preferences click on the Java icon to access the Java Control Panel which will list your Java version. If you do not see a Java icon under System Preferences, Java 7 or later versions is not installed. Download Java for OS X directly from Oracle. Get the latest version If an app or webpage you want to use asks you to install Java software, you can download the current version of Java for OS X directly from Oracle's website.
This documents instructs you on how to setup a Java programmingenvironment for your Mac OS X computer and provides a step-by-stepguide to creating, compiling, and executing a Java program.We assume you are running at least OS X 10.2.3.All of the software is freely available on the Web. Kotor 2 hk factory walkthrough.
Java |
You will use the Java compiler javac to compile your Java programs andthe Java interpreter java to run them.Mac OS X includes implementation of Java 2 Standard Edition (J2SE) 1.4.1,so there is nothing to do in this step.
Command line interface |
You will type commands in an application called the Terminal.You might enjoy reading Neal Stephenson's light-heartedessay In the Beginningwas the Command Line.
- Open a terminal window. You can find this underGo -> Applications -> Utilities. Drag the Terminal to your dock sinceyou will be using it frequently.
- You should now have a Terminal window somewhere on the screen.It will have a command prompt that looks something like:
- To check that you have the right version of Java installed, typethe text in boldface below.
If Java is installed, you should see something like:
Now, check that the Java compiler is accessible.
If it is installed, you should see something like
If not, install the Developers Tools CD that came with your Mac anduse Software Update to make sure you have the latest version.
- Now, create a directory to store your Java programs.In the window containing the Command Prompt, type the bold commandsbelow:
The mkdir command creates a new directory;the cd command changes the current working directory.After executing these commands, your working directoryis the newly created ~username/introcs/hello/. All of yourfiles for Assignment 0 will go here.Don't be scared by the Terminal - you will only need to use afew basic commands. Keep this window open since you will need it laterin the assignment.
- Since you will be using the Terminal frequently, we recommend customizingWe recommend customizing the default settings.
- To check that you have the right version of Java installed, typethe text in boldface below.
Text Editor |
You will type and edit your programs in a text editor called JEdit.JEdit is similar to conventional word processors like MS Word,but it features many specialized programming tools includingsyntax highlighting, bracket matching, auto indenting, indentshifting, line numbering, and commenting out code. It's even written in Java.
- Downloadthe latest stable version of JEdit using the MacOSX package link.
- We recommend the following JEdit customizations.
- Enable Mac OS style menubar inUtilities -> Global Options -> Plugins -> Mac OS Settings
- Change the default indentation to four spaces viaUtilities -> Global Options -> Editing -> Indent Width andUtilities -> Global Options -> Editing -> Tab Width. Global Options -> Editing -> Soft tabs.-->
- Change the default tab width when printing to four spaces viaUtilities -> Global Options -> Printing -> Tab width when printing
- Add line numbers by checking Utilities -> Global Options -> Gutter -> Line Numbering
- Allow at most 80 characters per line byUtilities -> Global Options -> Editing -> Word wrap -> hard andUtilities -> Global Options -> Editing -> Wrap margin -> 80.
- Change the default line separator to Unix viaUtilities -> Global Options -> Loading & Saving -> Default Line Separator
- Remove the annoying . that marks the end of a line by uncheckingUtilities -> Global Options -> Text Area -> End of Line Markers
- To associate .java files with JEdit so that when you double-click a .java file,it opens it in JEdit:
- Right click a .java file (or click then shift-right click it if using Windows NT)
- Choose Open With.
- Select JEdit from the list of programs or locate JEdit by selecting Otherif necessary.
- Check the Always use this program to open this file type box
Create the program |
Now you are ready to write your first Java program.
- Launch JEdit Start -> jEdit.
- In the JEdit window, type the Java program exactly as it appears below.If you omit even a semicolon, the program won't work.
- When you're done, save the program usingFile -> Save As, chose the directory C:introcshelloand type in the file name HelloWorld.java.The file name is case sensitive and must exactly match the name of the classin the Java program. Don't forget to include the .java extension in thefile name.
Compile the program |
It is now time to convert your Java program into a form more amenable for executingon a computer. Megane ii service manual.
- From the Command Prompt, type
If javac complains in some way, you mistyped something, and you should check your program carefully. Ask for help if you can't see the mistake.
- If everything went well, you should see the followingin the Command Prompt:
Silence is golden in computer science.
- If everything went well, you should see the followingin the Command Prompt:
Execute the program |
Now it is time to run your program. This is the fun part.
- At the Command Prompt, type
- If all goes well, you should see
- You may need to repeat this edit-compile-execute cycle a few times before it all goes smoothly.Use the up and down arrow keys to repeat previous commands and avoid extra typing.
Troubleshooting |
Java Programming Software For Mac Free
When I try to run java I get: Exception in thread 'main'java.lang.NoClassDefFoundErrorYour CLASSPATH may have been set by some other program so that it no longer includes the current working directory in the search path. Try running your program with the command line
xml:lang='en-US'>These documentation pages are no longer current. They remain available for archival purposes. Please visit https://docs.oracle.com/javase
for the most up-to-date documentation.
This page shows you, step by step, how to convert a simple Java application to a version you can distribute on a Mac. To follow along, download the ButtonDemo (.zip) example from the Java Tutorial. This example was created using NetBeans which uses the Ant utility. You can run all necessary tools and make all necessary edits from the command line, without launching NetBeans. The Ant tool is required.
You have created a Java application and want to bundle it for deployment. This requires the following steps:
Create a JAR File
Java Program For Matrix Multiplication 3*3
This step creates the ButtonDemo.jar file.
Execute ant jar in the high-level project directory to create the dist/ButtonDemo.jar file. This jar file is used to create the .app package.
Bundle the JAR File into an App Package
To create the ButtonDemo.app package, use the appbundler tool. The appbundler is not shipped with the 7u6 version of the Oracle JDK for the Mac. You can download it from the Java Application Bundler project on java.net. There is also AppBundler Documentation available.
As of this writing, the most recent version is appbundler-1.0.jar, which is used by this document. Download the latest version available and substitute the file name accordingly.
- Install the appbundler-1.0.jar file. In this case, create a lib directory in the high-level project directory and add the appbundler-1.0.jar file.
- Modify the build.xml file in the high-level project directory as follows. (The added code is shown in bold.)
- Invoke the appbundler by typing ant bundle-buttonDemo from the high-level project directory. This creates the ButtonDemo.app package in the dist directory.
- You should now be able to launch the application by double clicking ButtonDemo.app in the Finder, or by typing open ButtonDemo.app at the command line.
Bundle the JRE with the App Package
In order to distribute a Java application, you want to avoid dependencies on third party software. Your app package should include the Java Runtime Environment, or JRE. In fact, the Apple Store requires the use of an embedded JRE as a prerequisite for Mac App Store distribution. The runtime sub-element of the task specifies the root of the JRE that will be included in the app package.
In this example, the location of the JRE is defined using the JAVA_HOME environment variable. However, you might choose to bundle a JRE that is not the same as the one you are using for development. For example you might be developing on 7u6, but you need to bundle the app with 7u4. You will define runtime accordingly.
Since this example defines the runtime sub-element using JAVA_HOME, make sure it is configured correctly for your environment. For example, in your .bashrc file, define JAVA_HOME as follows:
Use the following steps to modify the build.xml file at the top of the project directory:
Java Program For Mac
- Specify an environment property, named env:
- In the target that creates the bundle, specify the location of the JRE on your system, using the env property:
The resulting build.xml file should look like the following. (The new lines are shown in bold.)
Create a fresh version of ButtonDemo.app, using the ant bundle-buttonDemo command. The resulting version includes the JRE in the app package. You can confirm this by examining the Contents/PlugIns directory inside of the app package.
Sign the App
The Gatekeeper feature, introduced in Mountain Lion (OS X 10.8), allows users to set the level of security for downloaded applications. By default, Gatekeeper is set to allow only OS X App Store and Developer ID signed applications. Unless your app is signed with a Developer ID certificate provided by Apple, your application will not launch on a system with Gatekeeper's default settings.
For information on the signing certificates available, see Code Signing Tasks on developer.apple.com.
The signing certificate contains a field called Common Name. Use the string from the Common Name field to sign your application.
Sign your app using the codesign(1) tool, as shown in the following example:
https://softmenu.mystrikingly.com/blog/how-to-the-ancient-warfare-mod-wiki. To verify that the app is signed, the following command provides information about the signing status of the app:
To check whether an application can be launched when Gatekeeper is enabled, use the spctl command:
If you leave off the --verbose tag, and it does not print any output, indicates 'success'.
For more information, see Distributing Outside the Mac App Store on developer.apple.com. Snap art 4 1 3 280 cm. https://tlessaicoldoct1975.mystrikingly.com/blog/apple-mac-website.
Submitting an App to the Mac App Store
Packaging an app for the Mac App Store is similar to packaging for regular distribution up until the step of signing the app. Signing the app for the Mac App Store requires a few more steps, and a different kind of certificate.
- Downloadthe latest stable version of JEdit using the MacOSX package link.
- We recommend the following JEdit customizations.
- Enable Mac OS style menubar inUtilities -> Global Options -> Plugins -> Mac OS Settings
- Change the default indentation to four spaces viaUtilities -> Global Options -> Editing -> Indent Width andUtilities -> Global Options -> Editing -> Tab Width. Global Options -> Editing -> Soft tabs.-->
- Change the default tab width when printing to four spaces viaUtilities -> Global Options -> Printing -> Tab width when printing
- Add line numbers by checking Utilities -> Global Options -> Gutter -> Line Numbering
- Allow at most 80 characters per line byUtilities -> Global Options -> Editing -> Word wrap -> hard andUtilities -> Global Options -> Editing -> Wrap margin -> 80.
- Change the default line separator to Unix viaUtilities -> Global Options -> Loading & Saving -> Default Line Separator
- Remove the annoying . that marks the end of a line by uncheckingUtilities -> Global Options -> Text Area -> End of Line Markers
- To associate .java files with JEdit so that when you double-click a .java file,it opens it in JEdit:
- Right click a .java file (or click then shift-right click it if using Windows NT)
- Choose Open With.
- Select JEdit from the list of programs or locate JEdit by selecting Otherif necessary.
- Check the Always use this program to open this file type box
Create the program |
Now you are ready to write your first Java program.
- Launch JEdit Start -> jEdit.
- In the JEdit window, type the Java program exactly as it appears below.If you omit even a semicolon, the program won't work.
- When you're done, save the program usingFile -> Save As, chose the directory C:introcshelloand type in the file name HelloWorld.java.The file name is case sensitive and must exactly match the name of the classin the Java program. Don't forget to include the .java extension in thefile name.
Compile the program |
It is now time to convert your Java program into a form more amenable for executingon a computer. Megane ii service manual.
- From the Command Prompt, type
If javac complains in some way, you mistyped something, and you should check your program carefully. Ask for help if you can't see the mistake.
- If everything went well, you should see the followingin the Command Prompt:
Silence is golden in computer science.
- If everything went well, you should see the followingin the Command Prompt:
Execute the program |
Now it is time to run your program. This is the fun part.
- At the Command Prompt, type
- If all goes well, you should see
- You may need to repeat this edit-compile-execute cycle a few times before it all goes smoothly.Use the up and down arrow keys to repeat previous commands and avoid extra typing.
Troubleshooting |
Java Programming Software For Mac Free
When I try to run java I get: Exception in thread 'main'java.lang.NoClassDefFoundErrorYour CLASSPATH may have been set by some other program so that it no longer includes the current working directory in the search path. Try running your program with the command line
xml:lang='en-US'>These documentation pages are no longer current. They remain available for archival purposes. Please visit https://docs.oracle.com/javase
for the most up-to-date documentation.
This page shows you, step by step, how to convert a simple Java application to a version you can distribute on a Mac. To follow along, download the ButtonDemo (.zip) example from the Java Tutorial. This example was created using NetBeans which uses the Ant utility. You can run all necessary tools and make all necessary edits from the command line, without launching NetBeans. The Ant tool is required.
You have created a Java application and want to bundle it for deployment. This requires the following steps:
Create a JAR File
Java Program For Matrix Multiplication 3*3
This step creates the ButtonDemo.jar file.
Execute ant jar in the high-level project directory to create the dist/ButtonDemo.jar file. This jar file is used to create the .app package.
Bundle the JAR File into an App Package
To create the ButtonDemo.app package, use the appbundler tool. The appbundler is not shipped with the 7u6 version of the Oracle JDK for the Mac. You can download it from the Java Application Bundler project on java.net. There is also AppBundler Documentation available.
As of this writing, the most recent version is appbundler-1.0.jar, which is used by this document. Download the latest version available and substitute the file name accordingly.
- Install the appbundler-1.0.jar file. In this case, create a lib directory in the high-level project directory and add the appbundler-1.0.jar file.
- Modify the build.xml file in the high-level project directory as follows. (The added code is shown in bold.)
- Invoke the appbundler by typing ant bundle-buttonDemo from the high-level project directory. This creates the ButtonDemo.app package in the dist directory.
- You should now be able to launch the application by double clicking ButtonDemo.app in the Finder, or by typing open ButtonDemo.app at the command line.
Bundle the JRE with the App Package
In order to distribute a Java application, you want to avoid dependencies on third party software. Your app package should include the Java Runtime Environment, or JRE. In fact, the Apple Store requires the use of an embedded JRE as a prerequisite for Mac App Store distribution. The runtime sub-element of the task specifies the root of the JRE that will be included in the app package.
In this example, the location of the JRE is defined using the JAVA_HOME environment variable. However, you might choose to bundle a JRE that is not the same as the one you are using for development. For example you might be developing on 7u6, but you need to bundle the app with 7u4. You will define runtime accordingly.
Since this example defines the runtime sub-element using JAVA_HOME, make sure it is configured correctly for your environment. For example, in your .bashrc file, define JAVA_HOME as follows:
Use the following steps to modify the build.xml file at the top of the project directory:
Java Program For Mac
- Specify an environment property, named env:
- In the target that creates the bundle, specify the location of the JRE on your system, using the env property:
The resulting build.xml file should look like the following. (The new lines are shown in bold.)
Create a fresh version of ButtonDemo.app, using the ant bundle-buttonDemo command. The resulting version includes the JRE in the app package. You can confirm this by examining the Contents/PlugIns directory inside of the app package.
Sign the App
The Gatekeeper feature, introduced in Mountain Lion (OS X 10.8), allows users to set the level of security for downloaded applications. By default, Gatekeeper is set to allow only OS X App Store and Developer ID signed applications. Unless your app is signed with a Developer ID certificate provided by Apple, your application will not launch on a system with Gatekeeper's default settings.
For information on the signing certificates available, see Code Signing Tasks on developer.apple.com.
The signing certificate contains a field called Common Name. Use the string from the Common Name field to sign your application.
Sign your app using the codesign(1) tool, as shown in the following example:
https://softmenu.mystrikingly.com/blog/how-to-the-ancient-warfare-mod-wiki. To verify that the app is signed, the following command provides information about the signing status of the app:
To check whether an application can be launched when Gatekeeper is enabled, use the spctl command:
If you leave off the --verbose tag, and it does not print any output, indicates 'success'.
For more information, see Distributing Outside the Mac App Store on developer.apple.com. Snap art 4 1 3 280 cm. https://tlessaicoldoct1975.mystrikingly.com/blog/apple-mac-website.
Submitting an App to the Mac App Store
Packaging an app for the Mac App Store is similar to packaging for regular distribution up until the step of signing the app. Signing the app for the Mac App Store requires a few more steps, and a different kind of certificate.
You will need to create an application ID and then obtain a distribution certificate for that application ID. Submit your app using Application Loader. For more information, see the following links (on developer.apple.com):