java - JPype - 导入和调用方法的问题!

Question

我在下面附上我的代码

from jpype import *
from javax.swing import JFrame

classpath = "-Djava.class.path=praat.jar" 
startJVM(getDefaultJVMPath(),"-ea",classpath) 

frame = javax.swing.JFrame("Hello JPype")
label = javax.swing.JLabel("Hello JPype!", JLabel.CENTER)
frame.add(label)
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)
frame.setSize(200, 100) 
frame.show()
shutdownJVM()

当我运行这个程序时，我收到一个错误。

    /Library/Python/2.6/site-packages/jpype/_pykeywords.py:18: DeprecationWarning: the sets module is deprecated
  import sets
2010-02-01 22:26:27.473 Python[754:d07] Apple AWT Java VM was loaded on first thread -- can't start AWT.
Traceback (most recent call last):
  File "swing.py", line 10, in <module>
    frame = javax.swing.JFrame("Hello Jython")
  File "/Library/Python/2.6/site-packages/jpype/_jpackage.py", line 53, in __call__
    raise TypeError, "Package "+self.__name+" is not Callable"
TypeError: Package javax.swing.JFrame is not Callable

有什么办法可以解决这个问题吗？普通的 Hello World 程序工作正常，但是当我尝试导入包时，我遇到了类似的问题。

Answer 1

将 Java 运行时库 (rt.jar) 添加到类路径中，然后重试。该错误表明，无法找到 JFrame，但它位于 rt.jar 内。