How To Run Java Program In CMD

• Create a temporary folder C:\mywork. 
• Using Notepad or another text editor, 
• create a small Java file HelloWorld.java with the following text: 
  
  public class HelloWorld
  {
  public static void main(String[] args)
  {
  System.out.println("Hello, World!");
  }
  }
  
  • Save your file as HelloWorld.java in C:\mywork.  
  • To make sure your file name is HeloWorld.java, (not HelloWorld.java.txt),
  • first choose "Save as file type:" All files, 
  • then type in the file name HelloWorld.java
  
  
• Run Command Prompt (found under All Programs/Accessories in the Start menu).  Type
  C:\> cd \mywork
  This makes C:\mywork the current directory.
  C:\mywork> dir
  This displays the directory contents.  You should see HelloWorld.java among the files.
  C:\mywork> set path="C:\Program Files\Java\jdk1.5.0_09\bin"
  This tells the system where to find JDK programs.
  C:\mywork> javac HelloWorld.java
  This runs javac.exe, the compiler.  You should see nothing but the next system prompt...
  C:\mywork> dir
  javac has created the HelloWorld.class file.  You should see HelloWorld.java and HelloWorld.class among the files.
  C:\mywork> java HelloWorld
  This runs the Java interpreter.  You should see the program output:
  Hello, World!
  
  
  
  • If the system cannot find javac, check the set path command.
  • If javac runs but you get errors, check your Java text.
  • If the program compiles but you get an exception, check the spelling and capitalization in the file name and the class name and the java HelloWorld command.
  
  """  Java is case-sensitive! ""
  For More Detail or Any Query..!