test_jsubclass.py

来自「mallet是自然语言处理、机器学习领域的一个开源项目。」· Python 代码 · 共 50 行

from test_support import *

print_test('Subclassing Java from Python (test_jsubclass.py)', 1)

from java.lang import Runnable, Thread

# Overriding Methods

print_test('override methods', 2)
class MyThread(Thread):
	count = 0
	def run(self):
		self.count = self.count+1


t1 = MyThread()
t1.start()
t1.join()
assert t1.count == 1, 'subclassing java.lang.Thread'

print_test('pass subclass back to java', 2)

class MyRun(Runnable):
	count = 0
	def run(self):
		self.count = self.count+1

run = MyRun()
t = Thread(run)
t.start()
t.join()
assert run.count == 1, 'subclassing java.lang.Thread'

print_test("invoke super's constructor", 2)

class MyThread(Thread):
	def __init__(self):
		self.name = "Python-"+self.name

t = MyThread()
assert t.name[:14] == "Python-Thread-", 'automatic constructor call'

class MyThread(Thread):
	def __init__(self):
		Thread.__init__(self, "Python-Thread")

t = MyThread()
assert t.name == "Python-Thread", 'explicit constructor call'