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Install the binary files provided by Oracle

After you have installed the JRE, you can start Java applets and applications by double-clicking JAR files, JNLP files, and by using the browser. Note that 32-bit browsers, such as Firefox in 32-bit mode, and Chrome, are not supported by the JRE. If you also plan to create Java applications, then install the Java Development Kit (JDK). Java Development Kit: How To Install And Setup the JDK For A Mac Running OS XHow to install the Java Development Kit (thats the JDK to you) on Mac.

• Download JDK 8 from Oracle WebSite. [jdk-8u65-macosx-x64.dmg for Mac].
• Double click on jdk-8u65-macosx-x64.dmg and follow the screen instructions.
• Once the JDK package is installed check the below output

• Verify JDK version

• Set the JAVA_HOME in your .bash_profile or .zshrc(If you are using Zshell)

• If the above path creates an issue while using maven, please replace the JAVA_HOME with the below path

Jdk installation

• Check if any older version exists on the machine. If exists uninstall it.
• Goto Java SE download site @ http://www.oracle.com/technetwork/java/javase/downloads/index.html.
• Run the downloaded installer (e.g., 'jdk-8u{xx}-windows-x64.exe'), which installs both the JDK and JRE.
• By default, the JDK will be installed in directory 'C:Program FilesJavajdk1.8.0_xx', where xx denotes the upgrade number; and JRE in 'C:Program FilesJavajre1.8.0_xx'.

Configure environment variables

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Verify JDK installation

• Open command prompt (Start > in serach bar > type cmd.exe)

1. Issue 'path' command to list the contents of the PATH environment variable. Check to make sure that your <JAVA_HOME>bin is listed in the PATH.Don't type prompt>, which denotes the command prompt!!! Key in the command (highlighted) only.

2. Issue the following commands to verify that JDK/JRE are properly installed and display their version:

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Write hello world program

1. Create a directory to keep your works, e.g., 'd:myProject', or 'c:myProject', or any directory of your choice. Do NOT save your works in 'Desktop' or 'Documents' as they are hard to locate. The directory name shall not contain blank or special characters. Use meaningful but short name as it is easier to type.
2. Launch a programming text editor (such as TextPad, or NotePad++, or Sublime Text, or Atom). Begin with a new file and enter the following source code. Save the file as 'Hello.java', under your work directory (e.g., d:myProject).

Compile and Run hello world program

To compile the source code 'Hello.java':

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1. Start a CMD Shell (Click the 'Start' button ⇒ 'run...' ⇒ Enter 'cmd').
2. Set the Current Drive to the drive where you saved your source file 'Hello.java'. For example, suppose that your source file is saved in drive 'd', enter 'd:' as follow:
3. Navigate to d:myProject folder
4. Type dir

5. Invoke the JDK compiler 'javac' to compile the source code 'Hello.java'.

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6. The output of the compilation is a Java class called 'Hello.class'. Issue a dir (List Directory) command again to check for the output.

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7. To run the program, invoke the Java Runtime 'java':