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This article is about how to learn Jython in code applications. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

By now, you should know more about the structure and syntax of Jython. The rest of the content * * is to learn Jython by analyzing several simple but complete working procedures. The first is the classic example program-- Hello WorldBright-- which is shown in Jython as follows:

Listing 1. Jython's Hello World!

Print "Hello World!"

In Jython (as in Python), the source file uses the extension "py". When the "Hello World" statement is placed in a source file such as hello.py, it is a complete program.

For comparison, take a look at the equivalent Java program and look at the following hello.java file:

Listing the Hello World of 2.Java!

Public class hello {public static void main (String [] args) {System.out.println ("Hello World!");}}

The format of Jython is obviously simpler, as it usually is. The good thing about Jython is that the code can be interpreted directly, or it can be translated into Java source code and automatically compiled into class files. You can run the Hello World program with the following Java command:

C:\ > java-Dpython.home=C:\ jython-2.1-cp C:\ jython-2.1\ jython.jar org.python.util.jython hello.py

You can also run the program with the following more convenient Jython script:

C:\ > jython hello.py

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