[Scilab-Dev] call function in java language
Yung-Jang Lee
yjlee123 at gmail.com
Sun Nov 11 17:35:15 CET 2012
Sory.
It is my mistake to send mail in chinese to reply this question.
I thought someone ask question in a chinese Scilab Google group that I
joined.
Yung-Jang Lee
2012/11/12 Yung-Jang Lee <yjlee123 at gmail.com>
> Scilab 目前提供在 Java 環境 call scilab 函數的功能
> 你可依照以下程序使用
>
> 1. 先以 Scilab 語言設計未來需要被 Java 操作的計算功能
> 2. 利用 Scilab 所提供的 Java 介面, 透過 Java 環境操作 Scilab
>
> help javasci 可查出有哪些介面可以使用
>
> 3. 上一步計算完的結果以變數的形式存在 Scilab 工作空間 (workspace)，可透過 Scilab -Java 介面傳到
> Java 環境轉成Java 變數
>
>
>
> 你必須將 SCI\bin 加入到你的 PATH 環境參數內, 另外將幾個路徑加入倒 CLASSPATH 中 , 詳細說明可
> 以 help compile_and_run_javasci_v2 <http://compile_and_run_javasci_v2.html>
> 查到
>
>
> 以 scilab-5.4.0\modules\javasci\examples\v2 內之範例說明, 首先修改其中所附的 build.bat 如下
>
>
> --------------build.bat-------------
>
> echo offrem Path to Scilab dataset SCI=C:\ADE\programs\scilab-5.4.0<--------- 這行要記得用你自己了 Scilab 路徑名稱set oPath=%PATH%set PATH=%SCI%\bin;%oPath%rem Java APIset CLASSPATH=%SCI%/modules/javasci/jar/org.scilab.modules.javasci.jar;%SCI%/modules/types/jar/org.scilab.modules.types.jar;%SCI%/jarrem Path to native libsjavac -cp %CLASSPATH% Example1.javajava -cp %CLASSPATH%;. Example1
> set PATH=%oPath%
> ----- end of build.bat----------------------------------
>
>
> 開啟一個 DOS 視窗, cd 到 scilab-5.4.0\modules\javasci\examples\v2 內執行
>
> build
>
> 應該可看到輸出
>
> ......\scilab-5.4.0\modules\javasci\examples\v2>echo off
>
> 2. 4. 6.
> 4. 3.1415927 10.
> 6. 10. 12.
>
> 我將 Java code 簡單註解說明如下 :
>
> ---------------Example1.java 說明---------------
>
>
> // 以下三行之 Java package 由 Scilab 環境提供import org.scilab.modules.javasci.Scilab;import org.scilab.modules.types.ScilabType;import org.scilab.modules.types.ScilabDouble;
> class Example1 {
>
> public static void main(String[] args) {
> try {
>
> Scilab sci = new Scilab(); // 取得一個 Scilab 物件
>
> if (sci.open()) {
> /* Send a Scilab instruction */
> sci.exec("foo = [ 2, 4, 6; 4, 0, 10; 6, 10, 12 ];"); //以字串方式送出給 Scilab 執行
>
> /* Retrieve the variable foo */
> ScilabType foo = sci.get("foo"); // 取得 scilab 變數 foo
>
> /* Display the variable */
> System.out.println("Representation of : " + foo); // 顯示 Scilab 變數 foo
>
> /* Get the data and retrieve the 2,2 value */
> double[][] aReal = ((ScilabDouble)foo).getRealPart(); // 取得 foo(2,2) 之實部存成 Java 變數 aReal
> System.out.println("foo[1,1] = " + aReal[1][1]); // 列印 aReal
>
> /* Change the value of 2,2 */
> aReal[1][1] = Math.PI; // 改變 aReal(1,1) 內容
>
> /* Create a new variable */
> ScilabDouble bar = new ScilabDouble(aReal); // 以 aReal 內容設定一和 Scilab 交換資料的 Java 變數 bar
>
> /* Send it to Scilab */
> sci.put("bar", bar); // 將 Java 變數 bar 送到 Scilab 存成 Scilab 變數 bar
>
> /* Display it through Scilab */
> sci.exec("disp(bar)"); // 以 Scilab 語言顯示 bar
>
> sci.close();
> } else {
> System.out.println("Could not start Scilab ");
> }
>
> /* Can be improved by other exceptions: AlreadyRunningException,
> * InitializationException, UndefinedVariableException,
> * UnknownTypeException, etc
> */
> } catch (org.scilab.modules.javasci.JavasciException e) {
> System.err.println("An exception occurred: " + e.getLocalizedMessage());
> }
>
> }}
> ----------------------------------------------------
>
>
> 不過我發現目前這個版本 (Scilab-5.4 ) 在我的環境 執行這個程式有 bug, 幾個列印指令並未正常輸出
>
>
> 如果你和我的輸出結果一樣 那麼試試 5.3 版
>
> 這類 bug 最近幾版會較多 因為 Scilab 似乎正在進行由核心改變的大變動
>
>
>
> 2012/11/11 杜宽 <du.k at neusoft.com>
>
>> Hi,****
>>
>> I want to call a function created by myself in using java
>> language, so how can do ? thanks very much!****
>>
>> ** **
>>
>> ***************************
>>
>> 杜宽 du.k at neusoft.com****
>>
>> Mobile：13464181474****
>>
>> 东软集团股份有限公司****
>>
>> 政府事业部****
>>
>> 国土与住建开发部****
>>
>> ***************************
>>
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>>
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