Lab 1
AIM: Install JDK, write a simple "Hello World" java program, compilation, debugging, executing using java compiler and interpreter.

Step 1: Go to link. Click on Download JDK. For java latest version.

Step 2: Next,
  1. Accept License Agreement
Download latest Java JDK for your version(32 or 64 bit) of java for Windows.
Download latest Java JDK for your version(32 or 64 bit) of java for Windows.

Step 3: Once the download is complete, run the exe for install JDK. Click Next


Step 4: Once the installation is complete click Close

How to set Environment Variables in Java: Path and Classpath

The PATH variable gives the location of executables like javac, java etc. It is possible to run a program without specifying the PATH but you will need to give full path of executable like C:\Program Files\Java\jdk1.8.0_131\bin\javac A.java instead of simple javac A.java
The CLASSPATH variable gives the location of the Library Files.
Let's look into the steps to set the PATH and CLASSPATH
Step 1: Right Click on the My Computer and Select the properties

Step 2: Click on advanced system settings

Step 3: Click on Environment Variables

Step 4: Click on new Button of User variables


Step 5: Type PATH in the Variable name.


Step 6: Copy the path of bin folder which is installed in JDK folder.


Step 7: Paste Path of bin folder in Variable value and click on OK Button.


Note: In case you already have a PATH variable created in your PC, then paste your path separated with a semi-comma (;), edit the PATH variable to

PATH = <JDK installation directory>\bin;%PATH%;

 Here, %PATH% appends the existing path variable to our new value

 Step 8: You can follow a similar process to set CLASSPATH.

Note: In case you java installation does not work after installation, change classpath to

 
 CLASSPATH = <JDK installation directory>\lib\tools.jar;

Step 9: Click on OK button


Step 10) Go to command prompt and type javac commands.
If you see a screen like below, Java is installed.

Now Here your Hello World Program
HelloWorld.java
    class HelloWorld
    {
        public static void main(String arg[])
        {
            System.out.println("HelloWorld!!");
        }
    }

Output

PATH = \bin;%PATH%;

output of hello world program
HelloWorld.java

Note: Please Try to Yourself also. 

Happy Coding :)

 VISIT: https://codesnail.com