Call the python method in java

Sourceforge. netprojectsjython download the jython package and put jython in it. jar to the project directory 1. directly execute the python statement viewplainimportjavax in the java class. script. *; importorg. python. util. pythonInterpreter; importjava. io. *; imports... 1. directly execute python statements in java classes

View plain
Import javax. script .*;
Import org. python. util. PythonInterpreter;
Import java. io .*;
Import static java. lang. System .*;

Public class FirstJavaScript
{
Public static void main (String args [])
{
PythonInterpreter interpreter = new PythonInterpreter ();
Interpreter.exe c ("days = ('mod', 'tue ', 'Wed', 'Thu', 'Fri', 'sat, 'sun ');");
Interpreter.exe c ("print days [1];");
} // Main
}

The result is Tue, which is displayed on the console and called directly.

2. call the functions in the local python script in java:
First, create a python script named my_utils.py.

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Def adder (a, B ):
Return a + B

Create a java class for testing,

Java code FirstJavaScript:

View plain
Import javax. script .*;
Import org. python. core. PyFunction;
Import org. python. core. PyInteger;
Import org. python. core. PyObject;
Import org. python. util. PythonInterpreter;
Import java. io .*;
Import static java. lang. System .*;

Public class FirstJavaScript
{
Public static void main (String args [])
{
PythonInterpreter interpreter = new PythonInterpreter ();
Interpreter.exe cfile ("C :\\ Python27 \ programs \ my_utils.py"); // path, script name
PyFunction func = (PyFunction) interpreter. get ("adder", PyFunction. class); // adder python function name
Int a = 2010, B = 2;
PyObject pyobj = func. _ call _ (new PyInteger (a), new PyInteger (B); // pass the value, a B
System. out. println ("ansible =" + pyobj. toString ());
} // Main
}

The result is: Ansible = 2012

3. use java to directly execute the python script,
Create script inputpy

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# Open files

Print 'Hello'
Number = [3, 5, 2, 0, 6]
Print number
Number. sort ()
Print number
Number. append (0)
Print number
Print number. count (0)
Print number. index (5)

Create a java class and call this script:

View plain
Import javax. script .*;
Import org. python. core. PyFunction;
Import org. python. core. PyInteger;
Import org. python. core. PyObject;
Import org. python. util. PythonInterpreter;
Import java. io .*;
Import static java. lang. System .*;

Public class FirstJavaScript
{
Public static void main (String args [])
{
PythonInterpreter interpreter = new PythonInterpreter ();
Interpreter.exe cfile ("C :\\ Python27 \ programs \ input. py ");
} // Main
}

The result is:

View plain
Hello
[3, 5, 2, 0, 6]
[0, 2, 3, 5, 6]
[0, 2, 3, 5, 6, 0]
2
3