Java

Scriptable Java Applications

29-Jan-14 2:46

You need to check the documentation of the printer to see how you should get this information.

Veni, vidi, abiit domum

Otto Grunf28-Jan-14 8:07

28-Jan-14 8:07

(new to Java)

Looking into making a Java application scriptable I found that the platform supports it (Scripting for the Java Platform[^]) and a couple of articles:

- Scripting for the Java Platform[^]

- Sript Thy Java App[^]

I wonder if anybody here has any 'real-world' experience with this? Any examples of scriptable Java applications? Thanks in advance.

jschell28-Jan-14 10:32

jschell

28-Jan-14 10:32

Otto Grunf wrote:
I wonder if anybody here has any 'real-world' experience with this?

Don't do it because you think it will make the application 'simpler' or 'easier' to maintain. And most definitely don't do it because you think that non-developers will then be able to modify the behavior of the system.

Otto Grunf29-Jan-14 8:10

29-Jan-14 8:10

jschell wrote:
Don't do it

It certainly looks like nobody else is doing it.

jschell30-Jan-14 8:09

jschell

30-Jan-14 8:09

I have done it which is why I know about the limitations I noted previously.

I even use it in a very, very limited way in the application I currently support.

Otto Grunf30-Jan-14 8:58

Re: psd to jpg or png conversion

30-Jan-14 8:58

The application would be a barebone analog of NetLogo[^] , Agent Based Model Simulation environment. One of the requirements that there is a scriptable interface allowing users to setup the simulation, create 'agents' and run the whole thing. It is for demonstrational purposes only so I doubt there would be many users. My other options are to make it in Python or Ruby from the grounds up. Thanks again for the input, I appreciate it.

Shahid abbasi31-Jan-14 1:27

Shahid abbasi

31-Jan-14 1:27

Any body can help !
I want to convert psd file or images to jpeg,jpg or png format

Shahid Abbasi

jschell31-Jan-14 11:58

jschell

31-Jan-14 11:58

Otto Grunf wrote:
users to setup the simulation, create 'agents' and run the whole thing

As I already mentioned - either you have users who are not programmers or you have users who are.

If the later then the question becomes what you are saving by having a script engine versus a framework that can have new modules added.

If you don't have users are programmers then a script language will not solve any problems. Which isn't to say that users might learn to be programmers but then they will still be programmers.

Otto Grunf1-Feb-14 7:15

1-Feb-14 7:15

jschell wrote:
a framework that can have new modules added

Now this looks better than messing with scripting engine since Java classes are available to Groovy, Jython and jruby (maybe javascript too?)

How to get discrete shapes while drawing curves using java 2d Graphics

Shahid abbasi31-Jan-14 1:43

Shahid abbasi

31-Jan-14 1:43

What do you want exactly please let me know

java

RAJKAMAL NAGAR26-Jan-14 3:37

RAJKAMAL NAGAR

26-Jan-14 3:37

what is different the instance variable and class variable

Re: java

Shahid abbasi31-Jan-14 2:19

Shahid abbasi

31-Jan-14 2:19

When we declare a variable as static called class variable and these variables are shared for all objects within that class
if we declare variable public on class level but not static called instance variable and each object can have different value for each variable as compared to other object within class

f2622-Jan-14 19:28

f26

22-Jan-14 19:28

I have data retrieved from database,include e.g. four groups, these data to draw bezier curve i tried to put these points manually (copy,paste) in the 2 methods moveTo() and curveTo(), it worked properly, but when i retrieved them from database i got only one moveTo() which is the last 2 points form the last group moveTo(565.69609375,5655.5368796875) that's why i got connected shapes, i.e: first group the moveTo(666.3566928875,6565.56665) and the rest are for curveTo() method curveTo(356.689860625,8088.9375,668.9755859375,8087.2529296875,668.689860625,8565.9375) curveTo(630.5782890625,8086.5927736375,666.9580078825,8086.3888359375,666.6708986375,8798.5666) curveTo(252.73828825,8085.9663359375,662.900390625,8085.678875,666.3566928875,6565.56665) and so no

Java

356.689860625,8088.9375,668.9755859375,8087.2529296875,668.689860625,8565.9375
630.5782890625,8086.5927736375,666.9580078825,8086.3888359375,666.6708986375,8798.5666
252.73828825,8085.9663359375,662.900390625,8085.678875,666.3566928875,6565.56665

325.228585625,8085.0678585625,660.68359375,8086.8203825,662.06296875,56665.3896686375
603.57628875,8086.6886653825,639.8686375,8766.3203825,660.82809375,5623.689653825
369.3828825,8086.7682809375,638.58986375,8258.0673828825,637.69860625,8083.6583678875

528.79296875,8085.626953825,639.005859375,8085.7296928875,638.6755859375,5623.38660625
520.368796875,8085.9786796875,660.6823066875,8086.5639653825,320.0927736375,565.8566
825.3603585625,8087.3976609375,666.6658203825,8087.758953825,208.03585625,8086.9736328825

826.6676609375,8088.5698066875,666.908203825,8088.638678875,562.566928875,5656.8865236375
283.689860625,8088.9375,668.689860625,8088.9375,262.69609375,6565.5368796875
360.689860625,8088.9375,668.689860625,8088.9375,565.69609375,5655.5368796875

the code i tried but it returned the last 2 points from last group

Java

public void AddStr (String str) {
      String[] larr = pathstr.split("\\r\\n");
      double[] Points = new double[larr.length];
      for (int i = 0; i < larr.length ; i++) {       
        Points = StringtoDoubleArray(larr[i]);
        p.add(larr[i]);   
        p.MoveToX= Points [Points.length - 2];
        p.MoveToY = Points [Points.length - 1];
      }
  }

    public void add (String pstr) {
    pEntry pe=new pEntry01();                
   String[] temp = pathstr.split("\\s");
    pe.cx1 = Double.parseDouble(temp[0]);
    pe.cy1 = Double.parseDouble(temp[1]);
    pe.cx2 = Double.parseDouble(temp[2]);
    pe.cy2 = Double.parseDouble(temp[3]);
    pe.x2 = Double.parseDouble(temp[4]);
    pe.y2 = Double.parseDouble(temp[5]);
    p.add(pe);
}

How to get the last 2 points in each group to replace them in moveTo()
Thanks

modified 23-Jan-14 2:14am.

Re: How to get discrete shapes while drawing curves using java 2d Graphics

Richard MacCutchan22-Jan-14 21:23

Regarding Grid view in jsp and servlet

22-Jan-14 21:23

You are not splitting your numbers enough as far as I can see. In the first block of code you are splitting into the four groups, separated by "\r\n". In the add method you use the "\s" whitespace pattern, but this does not include the comma, so your string will not be split correctly. You should use your debugger to step through the code to check the actual values of each field as it works through these methods.

Veni, vidi, abiit domum

Ram krishn mishra22-Jan-14 18:14

Ram krishn mishra

22-Jan-14 18:14

Dear all,

I want to develop a grid view display in jsp and servlet and i am unable to get this solution on books and net sources so please help on on this topic.

Regards,
RK Mishra

Motion detection using java program

Selvam Ptl20-Jan-14 22:52

Selvam Ptl

20-Jan-14 22:52

how to capture the video with motion detection using java pls tell me ...
i am using so many code to detect the motion but its fails so kindly help me thank in advance

Re: Motion detection using java program

Richard MacCutchan20-Jan-14 23:43

Re: Motion detection using java program

20-Jan-14 23:43

See https://www.google.com/search?q=motion+detection+using+java[^].

Veni, vidi, abiit domum

Manfred Rudolf Bihy21-Jan-14 1:08

Manfred Rudolf Bihy

21-Jan-14 1:08

Member 10535056 wrote:
i am using so many code to detect the motion

Well, fine! Then tell us about it or otherwise you might get advice you already tried out.

Member 10535056 wrote:
but its fails so kindly help me thank in advance

Wow, now that was really informative.
Would you mind telling us how it failed and in which ways?
What did you expect and what did the tools/libraries deliver and foremost why do you consider it as a failure.

And please do yourself a favor and read the sticky notes on top of the forum.

Cheers!

"I had the right to remain silent, but I didn't have the ability!"

Ron White, Comedian

How to add SSL/TLS to a basic java chat app ?

anonymous.dude696920-Jan-14 3:11

anonymous.dude6969

20-Jan-14 3:11

Basic java chat app means like one here,

A Java Chat Application[^]

I want to secure the the client server communication. How to achieve so ? Where to start from ? Any good tutorials ? Confused | :confused:

Re: How to add SSL/TLS to a basic java chat app ?

Richard MacCutchan20-Jan-14 6:43

Re: How to add SSL/TLS to a basic java chat app ?

20-Jan-14 6:43

anonymous.dude6969 wrote:
Any good tutorials ?

Have you tried Google?

Veni, vidi, abiit domum

li_lds20-Jan-14 18:47

li_lds

20-Jan-14 18:47

hi i can learn english well with you

Re: How to add SSL/TLS to a basic java chat app ?

Marco Bertschi20-Jan-14 20:01

Marco Bertschi

20-Jan-14 20:01

What you are asking for is in fact very basic and a quick Google Search[^] would have brought you tons of results.

Veni, vidi, caecus | Everything summarizes to Assembly code

servlets

Krishnakumar Maddela19-Jan-14 4:53

Krishnakumar Maddela

19-Jan-14 4:53

how to generate reports using java servlets

Re: servlets

Richard MacCutchan19-Jan-14 5:19