我想要一個非常簡單的例子使用JPype(版本: 0.5.4.6)從Python內實例化一個自定義Java類。它 鬆散如下的例子: http://hustleplay.wordpress.com/2010/02/18/jpype-tutorial/並 有關: JPype Headaches使用與JPype自定義Java類:包不可調用錯誤
這裏的Python代碼(在/Users/me/jpypeTest/testjpype.py):
from jpype import *
cpopt="-Djava.class.path=%s" % ("/Users/me/jpypeTest")
startJVM(getDefaultJVMPath(),"-ea",cpopt)
print "JVM path:",getDefaultJVMPath()
print "classpath:",cpopt
java.lang.System.out.println("Hello World!!")
testPkg = JPackage('pkg')
Test = testPkg.Test
Test.speak("hi")
shutdownJVM()
和這裏的java的代碼(在/Users/me/jpypeTest/pkg/Test.java):
package pkg;
public class Test {
private String msg;
public Test() {
msg = "nothing so far...";
}
public static void speak(String msg) {
System.out.println(msg);
}
}
編譯使用:
javac Test.java
生產/Users/me/jpypeTest/pkg/Test.class沒有錯誤 (我也曾嘗試把中的Test.class工作目錄)
運行Python代碼給出:
> python testjpype.py
JVM path: /System/Library/Frameworks/JavaVM.framework/JavaVM
classpath: -Djava.class.path=/Users/me/jpypeTest
Hello World!!
Traceback (most recent call last):
File "testjpype.py", line 9, in <module>
Test.speak("hi")
File "/Users/me/dev/lib/python2.7/site-packages/jpype/_jpackage.py", line 53, in __call__
raise TypeError, "Package "+self.__name+" is not Callable"
TypeError: Package pkg.Test.speak is not Callable
系統運行小牛與Mac:
> java -version
java version "1.7.0_45"
Java(TM) SE Runtime Environment (build 1.7.0_45-b18)
Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)
> javac -version
javac 1.7.0_45
> python --version
Python 2.7.5
> python -c 'import sys;print("%x" % sys.maxsize, sys.maxsize > 2**32)'
('7fffffffffffffff', True)
上市導入Java類的JPype方法也將是非常有用
非常感謝您看到這個!
你有解決這個問題嗎? – Sankalp
恐怕不是,很久以前放棄 –