Running a Java File using Command Prompt

• To execute a .java file u have to have installed JDK.
  Make sure, u have JDK (Java Development Kit) installed in ur pc
  if u don’t have it, then u can download the latest version of JDK from (http://java.sun.com/javase/downloads/index.jsp)
  download and install it.

• create a .java file using a text editor ( like Notepad, Wordpad )

  

  Test.java

• give a name (Example : Test) with .java extension [Test.java]
  remember the file type must have the extension .java (not .txt)

• Copy this file and paste it in ‘bin’ folder.
  U will get it where u installed ur JDK.
  By default it should be, C:\Program Files\Java\jdk1.6.0_13\bin

• Running Command Prompt :
  1. Start menu > All Programs > Accessories > Command Prompt. Or,
  2. Start menu > Run… > (type) cmd > click ok.

• In Command prompt :
  type the key word “cd” .. which means change directory (cd)
  give a space and type the full path of ur JDK (bin) folder
  By default it should be, C:\Program Files\Java\jdk1.6.0_13\bin
  press Enter

  

  Command Prompt

• Now type : javac Test.java
  press Enter
  a file named (Test.class) will be created automatically after this command, in bin directory. Check it.

  

  Command Prompt_2

• Now type: java Test
  press Enter

  

  Command Prompt_3

• A dialog box will appear
  write a name input box and click ok.

  

  Input_Dialog

• A message will be showed, displaying the name
  click ok.

  

  Message_box

• Now go back to the command prompt and type ‘exit’
  press Enter.

  

  Command Prompt_4

• Congratulation !!!
  u have successfully executed a Java file using command prompt.