View source for Tutorial:BeanShell/1 Introduction


__NOCACHE__


<jnote>
This tutorial is fully interactive and it is  powered by Java. Please select '''Always trust content from this publisher'''  when you will see a pop-up window. Please wait   while the Java downloading  the library for this tutorial. If Java is not installed, you still can see the examples, but they  will be interactive.</jnote>

Left window is a code editor which can be used to type BeanShell commands. Press the [Run] button on the right to run these commands and to see the output. You can change vertical divider position with the mouse if the output does not fit to the right window.

Let's get familiar with the interactive prompt. Type:

<jc lang="bsh">
print("ok");
</jc>

and press [Run]. You will see "ok".  This means that  you can talk to the interactive BeanShell. In fact, now you have learned how to print a string (“ok”). You can type the same a new text  in the editor, and press [Run]. For example, let's print ok on different lines using "\n" as a separator:

<jc lang="bsh">
print("ok\nok\nok");  //  comment
</jc>
where  two backslashes  indicate  your comment for this code. Again, press [Run]. You will see a pop-up window with the 3 lines of "ok". The reason why you got a pop-up window instead inline output, is because the text did not fit to the on-line window. You can type several commands on one line, but separated them with ";"

<jc lang="bsh">
print("ok"); print("ok"); print("ok"); // comment
</jc>

In some cases you can edit example and run the modified code. In such cases you will see a green border around such codes. Try to change 'ok' to something else and print "output"

<jc lang="bsh_edit">
print("ok");  //  you can edit this command
</jc>

If you are not the registered member, you cannot run the code and cannot see the outputs.