Validating Installation or Running Hello World in Java

Step 1 : Checking Directory Structure

1. After installing JDK , Restart system.
2. Open My Computer and Check Java Installation Directory.

3. These two folders gets created inside “My Computer => C Drive => Program File => Java“.
4. Check Inside JDK folder and look for “java” , “javac” application files.

5. If these files are present then 75% we are on right track. Now Let’s Check whether “javac” is working properly or not.
6. Type command in cmd java -version 

Step 2 : Writing Sample Hello.java Program

6. Create “code” folder inside C Drive. (call it as – hello.java)
7. Copy paste following code snippet and paste into notepad. (Dont forgot to save File using .java extenstion) .

class hello
{
public static void main(String args[])
  {
      System.out.println("Welcome to Java");
  }
}

8. Note : Select File Type as All files.

9. Now open Command Prompt.
10. Type following Commands.

C:>java -version //for checking version of java

C:>javac -version //checking compiler version

C:>cd code

C:code>javac hello.java

C:code>java hello
Welcome to Java

C:code>