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Testing DataMalt 2.3 using JDK 12 Early-Access Builds
12-13-2018, 11:01 PM (This post was last modified: 12-13-2018 11:11 PM by admin.)
Post: #2
RE: Testing DataMalt 2.3 using JDK 12 Early-Access Builds
Hi,

Indeed, it works with all these warnings. But I remind that some Jython web scripts require adjustment of the "import" statements, since Jython 2.7 cannot use wild cards (i.e. "*") for importing Java packages starting (starting from the JDK version 9).

For example, this script with the explicit import statement works OK for all Java versions:

Code:
from jhplot  import HPlot3D,H2D,F2D
from java.util import Random
c1 = HPlot3D("Canvas",600,400)
c1.setColorMode(4)
c1.visible(1)
h1 = H2D("My 2D Test 1",30,-3.0, 3.0, 30, -3.0, 3.0)
f1 = F2D("8*(x*x+y*y)", -3.0, 3.0, -3.0, 5.0)
rand = Random()
for i in range(1000):
   h1.fill(0.4*rand.nextGaussian(),rand.nextGaussian())
c1.draw(h1,f1)
c1.export("image.eps")

But the Jython code shown below fails (due to the regular expression
in the import statement "java.util import *"):

Code:
from jhplot  import HPlot3D,H2D,F2D
from java.util import *
c1 = HPlot3D("Canvas",600,400)
c1.setColorMode(4)
c1.visible(1)
h1 = H2D("My 2D Test 1",30,-3.0, 3.0, 30, -3.0, 3.0)
f1 = F2D("8*(x*x+y*y)", -3.0, 3.0, -3.0, 5.0)
rand = Random()
for i in range(1000):
   h1.fill(0.4*rand.nextGaussian(),rand.nextGaussian())
c1.draw(h1,f1)
c1.export("image.eps")

The output of the code above[/quote][/code]:

Quote:Traceback (most recent call last): , File test.py, line 16, in <module> ,
rand = Random() , NameError: name Random is not defined ,

The Jython package inside DataMelt should be updated when Jython will be certified for JDK9-JDK12. As far as I know, this works on Jython is ongoing.

Tania
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RE: Testing DataMalt 2.3 using JDK 12 Early-Access Builds - admin - 12-13-2018 11:01 PM

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