Java

Running your Java application

Note that Java is case sensitive.

Create your source code, and store it in a file with a .java extension, e.g. YourProgram.java.
Run the compiler (javac (in lower case) in the case of the JDK):

javac YourProgram.java

The compiler creates a bytecode program called YourProgram.class, if there are no errors.
Execute YourProgram.class:

java YourProgram

If you have compiled an application, it should now run on any Java virtual machine on any machine that has it.
If you have compiled an applet, you need to embed it in a web page first, then it can execute it within any Java-enabled web browser, or use the appletviewer provided in the JDK. Within the directory containing YourApplet, enter the command:

appletviewer YourApplet.html

If you are using a product other than JDK, follow its instructions to acheve the same result.

Example of Java Application

Try creating and running a Java application as described above using the following code.


public class MyFirstApp
{
  public static void main(String[] args)
{
    String[] casts = 
  {
      "you will become rich"  , "you will be healthy",
      "you will get married"  , "you will change jobs",
      "you will get promoted" , "there will be an addition to your family",
      "you will meet a tall dark handsome stranger"
                     };
    System.out.println("Your forecast for today is that "
              + casts[(int)( casts.length*Math.random())%7]);
  }
}