How to install Java
This document instructs you on how to set up a Java programming environment for your Mac OS X computer. It also provides a step-by-step guide for creating and compiling a Java program in IntelliJ and executing it from the command line. You will need a Mac running Mac OS X 10.13 (High Sierra) to Mac OS X 10.15 (Catalina). How to Download and Install Java JDK on Mac OS X Do you want to know how to install the Java JDK 11 (Java SE Development Kit) on your Mac? Well, you're in th.
Checking to see if Java is installed
For everyone:
•Open a terminal window (or a command prompt window if you are using Windows--NOT Cygwin)
•Type 'java -version' and press enter. Then, type 'javac -version' and press enter.
•For each of these you should see some text, and then the numbers '1.6.0_##'. (It doesn't really matter what's after the '_', as long as the first part says 1.6.0). If you do, then you're all set for class.
•If you see numbers other than 1.6, or get an error message, follow the steps below to install Java on your computer.
Setting up Java 6 on PC and Mac
For PC (Windows and some Unix)
Download/Install
Checking to see if Java is installed
For everyone:
•Open a terminal window (or a command prompt window if you are using Windows--NOT Cygwin)
•Type 'java -version' and press enter. Then, type 'javac -version' and press enter.
•For each of these you should see some text, and then the numbers '1.6.0_##'. (It doesn't really matter what's after the '_', as long as the first part says 1.6.0). If you do, then you're all set for class.
•If you see numbers other than 1.6, or get an error message, follow the steps below to install Java on your computer.
Setting up Java 6 on PC and Mac
For PC (Windows and some Unix)
Download/Install
1.Go to: http://www.oracle.com/technetwork/java/javase/downloads/index.html
2.In the Java Platform, Standard Edition box, click on the Download JDK button.
3.Click the 'Download' button under 'Download Java SE Develepment Kit'.
4.On the download page under the 'Platform' pull-down menu select 'Windows' if you have a 32-bit OS or 'Windows x64' if you have a 64-bit OS. Then click 'Continue'.
5.A download page will pop-up. Click on the file under 'Java SE Development Kit'.
6.Locate where you downloaded the installation file on your computer and double-click it to start installing.
7.Keep clicking Next until the installation is complete.
Setting the Path- Windows
1.Right-Click the Computer icon from the Start Menu or the Desktop and select Properties.
2.Go to the Advanced tab in XP (or click Advanced system settings in Vista) and click the Environment Variables button.
3.In the User variables for section at the top, look for the variable Path (not PATH).
4.If the Path variable already exists, click Edit. If it doesn't exist, click New.
Variable name: Path
Variable value: Add YOUR_JAVA_BIN_PATH (should be ;C:Program FilesJavajdk1.6.0_17bin;. ) to the end
(Make sure the path starts and ends with a ;.)5.In the System Variables section, look for the variable CLASSPATH.
6.If the CLASSPATH variable already exists, click Edit. If it doesn't exist, click New.
Variable name: CLASSPATH
Variable value: Add ;. to the end, if it's not already there7.Keep clicking OK until the System Properties window closes.
8.Close all open programs (you might have to restart) for these changes to take effect.
9.Now you should be able to compile programs with just 'javac' and run programs with 'java' without having to be in the java bin directory. Open a new terminal window and repeat the 'Checking to see if Java is installed' section to make sure everything works.
Should You Download Java On Mac Version
For MAC OSX 10.5 (Leopard)
1.Updates to Java are included in Mac OS X's Software Updates. If you are running an old version of Java, you should use the Software Update tool to get the latest version.
2.Once you have updated, follow the instructions below for making Java 6 the default installation.
Install Java For Mac
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Make Java 6 the Default
Should You Download Java On Mac Catalina
1.Open the Java Preferences utility which can be found by going to /Applications/Utilities/ or doing a search for Java Preferences.
1.There should be two lists present in the Java Preferences window - the top one is labeled 'Java Applet Plugin' and the bottom one is labeled 'Java Applications'. In the bottom window, and drag the version named 'Java SE 6' to the top if it is not already so.
2.Exit Java Preferences.
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3.Open a new terminal window and repeat the 'Checking to see if Java is installed' section to make sure everything works.
