Setting Up and Testing Local Java Development Environment

The Java Development Toolkit ( JDK ) must be downloaded and installed. In Windows 8, the default installation path is:

C:\Program Files\Java\jdk1.8.0

1	C:\Program Files\Java\jdk1.8.0

Step #1: Confirm if Java is installed

Open the Command Prompt (Press Win + R, and type cmd, press Enter ). Once the command prompt launches, it should look like:

Now, type:

C:\Users\Dhiraj Jha>java -version

1	C:\Users\Dhiraj Jha>java -version

Make sure, they are spelt correctly and in small-caps.

This confirms that, the JDK is installed and we are ready or we go to step #2.

Step #2: Look for the folder and set environment variables

You might find the following error on the command prompt:

You can verify the default installation path and see whether the folder is at the aforesaid location or not. If missing, re-confirm, it might have been accidentally placed at some other location while installation. Otherwise, re-install the JDK with default settings for the time being. Go to Step #3.

Step #3: Setting up the Environment Variables

Right Click on My Computer ->Properties->Advanced System Settings->Environment Variables

Within the System Variables, set few variables:

JAVA_HOME : This is the path to the installation directory of the Java Development Toolkit.

C:\Program Files\Java\jdk1.8.0

1	C:\Program Files\Java\jdk1.8.0

Path: This is the path for the binaries ( \bin folder). There might be some other values within the Path System Variables, so place the following code at the beginning.

%JAVA_HOME%\bin;

1	%JAVA_HOME%\bin;

Make sure, there are no white-spaces between the % and \ characters.

Click on OK->OK->OK. This will close the System Properties window.

Now, close the command prompt (if already opened). Re-open the command prompt, and check for these commands:

C:\Users\Dhiraj Jha>java -version

1	C:\Users\Dhiraj Jha>java -version

C:\Users\Dhiraj Jha>echo %JAVA_HOME%

1	C:\Users\Dhiraj Jha>echo %JAVA_HOME%

C:\Users\Dhiraj Jha>echo %PATH%

1	C:\Users\Dhiraj Jha>echo %PATH%

and you should see the following:

Step #3: Write Simple “Hello World” Program in Java

Open Notepad and type the following:

//Hello.java

public class Hello
{
  public static void main( String[] args )
 {
   System.out.println(" Hello World");

 }//main method ends

}//class ends

//Hello.java

public class Hello

{

public static void main( String[] args )

{

System.out.println(" Hello World");

}//main method ends

}//class ends

and save the file at the location d:\java_codes just for the time-being. Type the following code:

C:\Users\Dhiraj Jha>d:

1	C:\Users\Dhiraj Jha>d:

D:\>cd java_codes

1	D:\>cd java_codes

In order to compile the file:

D:\java_codes>javac Hello.java

1	D:\java_codes>javac Hello.java

In order to see that a (.class) file with the same name as that of class is generated called, byte codes:

D:\java_codes>dir

1	D:\java_codes>dir

In order to execute the application, the utility is java

D:\java_codes>java Hello

1	D:\java_codes>java Hello

The output looks like:

Hopefully, this article will help newbies for their first step towards Java Development. Happy Coding!!!

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Setting Up and Testing Local Java Development Environment

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