从jython调用Java方法的右重载 [英] Calling right overload of the java method from jython

问题描述

我正在使用Java库，该库在我使用的类中具有重载的方法.

I am using java library, that has overloaded methods in the class that I use.

JAVA:
void f(float[]);
void f(Object[]);

现在，我从jython调用此类，并且我想调用Object []重载.问题在于python将我的数组视为浮点数组，因此调用了错误的重载方法.

Now I call this class from jython, and I want to call the Object[] overload. The problem is that python sees my array as array of floats, and therefore calls the wrong overload methods.

JYTHON:
f([[1, 1.0]) 

如何强制执行Object []方法?

How to force the Object[] method to be executed?

推荐答案

我花了很多时间才能找到答案，所以我决定将问题和答案一起发布.

It took me considerable amount of time to find out, so I decided to post a question together with the answer.

Jython文档告诉您，为了强制调用右重载，您应该在调用之前手动将参数强制转换为java对象:

Jython documentation tells that in order to to force a call of right overload you should cast arguments to java objects manually before the call:

from java.lang import Byte
foo(Byte(10))

但是，这不适用于Java数组.

However that doesn't work with java arrays.

http://www.jython.org/archive/22/userguide.html#java-arrays

可以在jython中创建Java数组.例如，以下代码将在jython java类型为int []

It's possible to create java arrays in jython. For example the following code will create in jython java array of type int[]

from jarray import array
array(python_array, 'i')

您可以像这样创建Object []，并强制java调用正确的重载.

You can create Object[] like this, and force java to call the right overload.

from jarray import array
from java.lang import Object
oa = array(python_array, Object)
f(oa)

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