Problem creating image file via J/Link
- To: mathgroup at smc.vnet.net
- Subject: [mg70108] Problem creating image file via J/Link
- From: "Neil M" <anilm411 at gmail.com>
- Date: Wed, 4 Oct 2006 05:58:46 -0400 (EDT)
Hi. For some reason, the very simple J/Link code segment: <get kernel link stuff here> .... byte[] gifData = ml.evaluateToImage("Plot[Sin[x],{x,0,2 Pi}]",0,0,0, false); try { FileOutputStream s = new FileOutputStream(new File("foo.gif")); s.write(gifData); s.close(); } catch (IOException e) {System.out.println("Failed to open file.");} creates a graphics file "foo.gif" with nothing in it except the text "In[1]:=" I attached a packet listener to see what was happening and it produced this little nugget: Packet type was ReturnPacket. Contents follows. "In[1]:= " Packet type was ReturnPacket. Contents follows. "Null" I tried another route. Created a little stub routine Test.m which had the function: disFig[] := [<stuff> Display["foo.gif", Plot[Sin[x], {x, 0, 2 Pi}], "GIF"] ] Then I called Test.m in a J/Link program via the lines: ml.evaluate("<<Test.m"); ml.discardAnswer(); ml.evaluate("disFig[]"); Same result: A file foo.gif with only the line "In[1]:=". Any ideas on what's going wrong? Thanks.