osx - How to run java UI application on Mac from remote ssh terminal? -

-

on mac can connect ssh , run applications without display settings, e.g. open . run finder on mac screen remote terminal.

this doesn't work java applications:

java -jar demo/jfc/font2dtest/font2dtest.jar

will throw:

exception in thread "main" java.awt.headlessexception @ java.awt.graphicsenvironment.checkheadless(graphicsenvironment.java:207) @ java.awt.window.<init>(window.java:536) @ java.awt.frame.<init>(frame.java:420) @ javax.swing.jframe.<init>(jframe.java:225) @ font2dtest.main(font2dtest.java:1032)

any experiments display values didn't help.

in jdk8 can use awt_force_headful env variable overcome this:

awt_force_headful=true java -jar demo/jfc/font2dtest/font2dtest.jar

unfortunately there no easy way in jdk7.

the problem hidden in mac headless mode detection. next code checks app being in "aqua" session , forces headless otherwise.

// jdk/src/solaris/native/java/lang/java_props_macosx.c int isinaquasession() {   // environment variable bypass aqua session check   char *ev = getenv("awt_force_headful");   if (ev && (strncasecmp(ev, "true", 4) == 0)) {     // if "true" tell caller we're in aqua session without checking     return 1;   }   // windowserver available?   securitysessionid session_id;   sessionattributebits session_info;   osstatus status = sessiongetinfo(callersecuritysession, &session_id, &session_info);   if (status == noerr) {     if (session_info & sessionhasgraphicaccess) {         return 1;     }   }   return 0;  }

and 

// jdk/src/solaris/native/java/lang/java_props_md.c  // check if we're in gui login session , set java.awt.headless=true if not sprops.awt_headless = isinaquasession() ? null : "true";

Comments

Post a Comment

Popular posts from this blog

matlab - "Contour not rendered for non-finite ZData" -

-
i'm trying plot frequency characteristic equation using ezplot, matlab gives following warning, "contour not rendered non-finite zdata". have used command plot frequency equations warning , plot display empty , not change axis range well. can please help. appreciated. here's code i'm using. % transfer matrix case-i, thin rotor clear all; clc; ei = 1626; l = 0.15; m = 0.44108; = 2.178*10^-4; i_p = 2.205*10^-5; itr = 0.24; i_pr = 0.479; syms p n; f = [1 l*1i l^2/(2*ei)*1i l^3/(6*ei); 0 1 l/ei -l^2/(2*ei)*1i; 0 0 1 -l*1i; 0 0 0 l]; p = [ 1 0 0 0; 0 1 0 0; 0 -it*p^2+i_p*n*p 1 0; -m*p^2 0 0 1]; p_r = [1 0 0 0; 0 1 0 0; 0 -itr*p^2+i_pr*n*p 1 0; -m*p^2 0 0 1]; = f*p*f*p*f*p*f; b = p_r*f*p*f*p*f; r = a(1,2)/a(1,4); a12_p = 0; a22_p = a(2,2)-r*a(2,4); a32_p = a(3,2)-r*a(3,4); a42_p = a(4,2)-r*a(4,4); ap(2,2) = a22_p; ap(3,2) = a32_p; ap(4,2) = a42_p; ap(4,4) = 1; c = b*ap; m = [c(3,2) c(3,4); c(4,2) c(4,...
Read more

delphi - Indy UDP Read Contents of Adata -

-
i using indy udp server read string of data. however, not know how work adata parameter. can around converting binary using bytetobin function below , convert hex using bintohex1 . feel stupid , works slow. know how can directly results without 2 conversions? thanks!! here codes: procedure tform1.idudpserver1udpread(athread: tidudplistenerthread; const adata: tidbytes; abinding: tidsockethandle); var buf: tidbytes; buffer: string; data_received: string; begin if bytestostring(adata) <> 'hello' begin buffer := hextostring('00'); setlength(buf, length(buffer)); copytidstring(buffer, buf, 0); abinding.sendto(abinding.peerip, abinding.peerport, buf); data_received := bintohex1(bytetobin(adata[1]) + bytetobin(adata[2]) + bytetobin(adata[3]) + bytetobin(adata[4]) + bytetobin(adata[5]) + bytetobin(adata[6]) + bytetobin(adata[7]) + bytetobin(adata[8]) + bytetobin(adata[9]) + bytetobin(adata[10]) + bytetobin(adata[11...
Read more

javascript - Any ideas when Firefox is likely to implement lengthAdjust and textLength? -

-
any ideas when firefox implement lengthadjust andtextlength?..... working svg application. lengthadjust , textlength working fine in chrome not working in fire fox . <svg viewbox = "0 0 500 300" version = "1.1"> <defs> <path id="s3" d="m 10,90 q 100,15 200,70" /> </defs> <g> <text font-size = "20"> <textpath xlink:href="#s3" textlength="205"> short text</textpath> </text> <use xlink:href="#s3" fill="none" stroke="black" stroke-width="1"/> </g> </svg> this implemented in firefox text elements (not textpath or tspan) in case that's ok though can move attribute text element. <svg viewbox = "0 0 500 300" version = "1.1"> <defs> ...
Read more