Calling Java function thru PL-SQL

Dear all
As i am New to JAVA ,Can you plz Tell how we can call Java function thru PL-SQL?
To activate / deactivate function will be called from the database plug-ins. No need for GUI.
Using the URL ,The objective is to automate this function.
Many Thanks
Edited by: khaja on Jan 18, 2009 12:50 PM

Khaja,
Please refer to http://download.oracle.com/docs/cd/B19306_01/java.102/b14187/chthree.htm#CACICFFB
Please try to avoid asking questions for which you can easily find the answer yourself.
I had to look this up, and found it in less than 2 minutes.
Sybrand Bakker
Senior Oracle DBA

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<%@ page import = "Utils.*" %>
<%@ page import = "java.sql.*" %>
<%@ page import = "java.lang.String.*"%>
<%@ page import = "java.text.*" %>
<%@ page import = "java.util.*"%>
<%
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%>
<HTML>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<link rel="stylesheet" href="style.css" type="text/css">
<script language = "javascript">
/*Client side validations go here*/
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function deselectAll(iCount2)
     for (var i=0; i <iCount2; i++)
          document.getElementById("chk" + i).checked = false;
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</head>
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<%
int MaxCount = 15;
int iCount1 = 0;
int iCount2 = 0;
int iCount3 = 0;
String query = "";
String eMailAddresses = "";
StringBuffer sbMail = new StringBuffer();
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//try
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     String strCondition [] = new String [10];
     String strValue1 [] = new String [10];
     String strCombo [] = new String [10];
     for (iCount3 = 0; iCount3 < 10; iCount3 ++ )
          strCriteria[iCount3] = "";
          strCondition[iCount3] = "";
          strValue1[iCount3] = "";
          strCombo[iCount3] = "";
     if (request.getParameter ("txtAction") != null)
          //String nothing = request.getParameter("chk"+iCount2);
          //System.out.println("Value of checkbox : " +nothing);
          String strQuery[] = new String [MaxCount];
          StringBuffer sb = new StringBuffer();
          String AccessQuery = "";
          String strTmpQuery = "";
          String strTmpRefType[] = new String [4];
          int QueryLen = 0;
          int ModifyLen = 0;
          int QueryLenNew = 0;
          String strTmpRefType1 = "";
          String strTmpRefType2 = "";
String strTmpRefType3 = "";
     String strTmpRefType4 = "";
          strQuery[0] = "SELECT STUDREGID, NAME,STUDID,PROGRAM,BRANCH,CPI,EMAIL FROM STUDREGDTLS WHERE";
          sb.append(strQuery[0]);
          for (iCount3 = 1; iCount3 < 11; iCount3 ++)
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               strCriteria[iCount3 - 1] = request.getParameter("criteria" + iCount1);
               strCondition[iCount3 - 1] = request.getParameter("condition" + iCount1);
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                              strTmpRefType2 = "LIKE";
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                         else
                              System.out.println("Anywhere & Startswith not selected");
                              strTmpRefType2 = request.getParameter("condition" + iCount1);
                    if (request.getParameter("condition" + iCount1).equals("ANYWHERE"))
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                         else if (request.getParameter("condition" + iCount1).equals("="))
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                                        System.out.println(strTmpRefType3);
                              else
                                        strTmpRefType3 = request.getParameter("value" + iCount1);
                    strTmpRefType4 = request.getParameter("combo" + iCount1);
                    System.out.println("Value of strTmpRefType2" +strTmpRefType2);
               strQuery[iCount3] = " upper(" strTmpRefType1 ") " strTmpRefType2 " upper(" strTmpRefType3 ") " strTmpRefType4 "";
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               if (request.getParameter ("txtAction") != null)
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                         con = mc.DBConnection();
                         QueryLen = sb.length();
                         ModifyLen = strTmpRefType4.length();
                         QueryLenNew = (QueryLen - ModifyLen);
                         sb.delete(QueryLenNew, QueryLen);
                         AccessQuery = sb.toString();
                         System.out.println(AccessQuery);
                         stmt = con.prepareStatement (AccessQuery);
                         rs = stmt.executeQuery();
%>
<table width="563" >
<tr><td><DIV CLASS="windowtitle">Student Search</DIV></td></tr>
<tr><td><DIV CLASS="udGroupBoxHdrDiv">Enter Search Criteria</DIV></td></tr>
<tr><td CLASS="bgcol">
<FORM name=frmQueryBuilder METHOD='POST'>
<INPUT TYPE=hidden Name='txtAction' value='S'>
<table >
<%
     for(iCount1 = 1; iCount1 < 11; iCount1++)
               System.out.println (strCriteria[iCount1-1]);
               if(iCount1 == 9)
%>                         <TR valign=top>
<%
               else
%>                          <TR>
<%
%>
<TD width="47"><LABEL CLASS="assoctext">Criteria </LABEL></td><td width="150">
          <SELECT NAME='<%="criteria" + iCount1%>' size="1">
<OPTION VALUE='null'>- - - - - - - - - - - - - - - - -</OPTION>
     <OPTION VALUE='AGE' <%=strCriteria[iCount1-1].equals("AGE")?"selected":""%>>AGE</OPTION>
     <OPTION VALUE='BRANCH' <%=strCriteria[iCount1-1].equals("BRANCH")?"selected":""%>>BRANCH</OPTION>
     <OPTION VALUE='CPI' <%=strCriteria[iCount1-1].equals("CPI")?"selected":""%>>CPI</OPTION>
     <OPTION VALUE='DEPARTMENT' <%=strCriteria[iCount1-1].equals("DEPARTMENT")?"selected":""%>>DEPARTMENT</OPTION>
<OPTION VALUE='DREAMCOMP' <%=strCriteria[iCount1-1].equals("DREAMCOMP")?"selected":""%>>DREAM COMPANY</OPTION>
<OPTION VALUE='PROGRAM' <%=strCriteria[iCount1-1].equals("PROGRAM")?"selected":""%>>PROGRAM</OPTION>
<OPTION VALUE='SKILLSET' <%=strCriteria[iCount1-1].equals("SKILLSET")?"selected":""%>>SKILL SET</OPTION>
<OPTION VALUE='WORKEX' <%=strCriteria[iCount1-1].equals("WORKEX")?"selected":""%>>WORK EX</OPTION>
</SELECT>
          </TD>
     <TD width="88">
          <SELECT NAME='<%="condition" + iCount1%>'>
               <OPTION VALUE='<=' <%=strCondition[iCount1-1].equals("<=")?"selected":""%>><=</OPTION>
               <OPTION VALUE='>=' <%=strCondition[iCount1-1].equals(">=")?"selected":""%>>>=</OPTION>
               <OPTION VALUE='=' <%=strCondition[iCount1-1].equals("=")?"selected":""%>>EXACT MATCH</OPTION>
               <OPTION VALUE='ANYWHERE' <%=strCondition[iCount1-1].equals("ANYWHERE")?"selected":""%>>ANYWHERE</OPTION>
               <OPTION VALUE='STARTSWITH' <%=strCondition[iCount1-1].equals("STARTSWITH")?"selected":""%>>STARTS WITH</OPTION>
          </SELECT>
</TD><TD width="38"><LABEL CLASS="assoctext">Value </LABEL></TD>
<TD width="186"><INPUT NAME=<%="value" + iCount1%> value='<%=strValue1[iCount1-1]%>' size="20" >
</TD>
<TD width="187"><SELECT NAME='<%="combo" + iCount1%>'>
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               <OPTION VALUE='OR' <%=strCombo[iCount1-1].equals("OR")?"selected":""%>>OR</OPTION>
          </SELECT>
</TD>
</TR>
<%
%>
</table>
</td></tr>
<tr><td align=center>
<BR>
<INPUT CLASS="butstyle" type="button" id="cmdSave" enableAlways = "0" value="Submit" onclick="return submitForm();" >
</td></tr>
</table>
<table width="698">
<tr><td colspan = 6><DIV CLASS="udGroupBoxHdrDiv">Students Matching the Required Crieria</DIV></td></tr>
<TR>
     <TD CLASS="tblhdr" width="50"></TD><TD CLASS="tblhdr" width="155">Student Name</TD>     <TD CLASS="tblhdr" width="150">Student
Id</TD><TD CLASS="tblhdr" width="150">Program</TD><TD CLASS="tblhdr" width="150">Branch</TD><TD CLASS="tblhdr" width="62">CPI</TD>
     </TR>
<%          int i = 0;
     if (request.getParameter ("txtAction") != null)
               while( rs.next())
%>
<%                         System.out.println("Entered Output Loop"+ rs.getString("Name"));
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                         sbMail.append(rs.getString("Email")).append(",");
                         regTemp = rs.getString("STUDREGID");
                         i++;
                         System.out.println("student reg id........."+regTemp);
                         System.out.println("value of i........."+i);
%>
               <TR CLASS="bgcol">
                         <TD width="25"><INPUT TYPE="checkbox" NAME='<%="chk" + iCount2%>' id='<%="chk" + iCount2%>' VALUE=""></TD>
                         <TD width="155"><INPUT NAME=txtName size=20 value='<%=rs.getString("NAME")%>'></TD>
                         <TD width="150"><INPUT NAME=txtStudId size=20 value='<%=rs.getString("STUDID")%>'></TD>
                         <TD width="150"><INPUT NAME=txtProgram size=20 value='<%=rs.getString("PROGRAM")%>'></TD>
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                         <TD width="62"><INPUT NAME=txtCpi size=4 value='<%=rs.getString("CPI")%>'></TD>
               </TR>
                         <INPUT type="hidden" NAME=hdnEmail value='<%=rs.getString("Email")%>'>
                         <INPUT type = "hidden" NAME = studRegId value = '<%=rs.getString("studRegId")%>'>
                         <INPUT type ="hidden" NAME =temp value ="">
<%
                         iCount2++;
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                         con.close();
//catch( Exception e)
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                    con.close();
%>
</table>
<table width="698" align=center>
<tr><td>
<BR>
<INPUT CLASS="butstyle" valign=top type="button" id="cmdSave" enableAlways = "0" value="Select All" onclick="return selectAll(<%=iCount2%>)" >
</td>
<td>
<BR>
<INPUT CLASS="butstyle" valign=top type="button" id="cmdSave" enableAlways = "0" value="Deselect All" onclick="return deselectAll(<%=iCount2%>)" >
</td>
<td>
<BR>
<INPUT CLASS="butstyle" valign=top type="button" id="cmdSave" enableAlways = "0" value="Send Mail" onclick="sendMail(<%=iCount2%>)" >
</td>
</tr>
</table>
</FORM>
</BODY>
</HTML>
<%     System.out.println("value inside hidden var temp"+request.getParameter("temp"));
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     //if(regTemp != null)
          MakeConnection mc1 = new MakeConnection();
          con1 = mc1.DBConnection();
          String temp = "1";
          System.out.println("inside the if loop for regTemp");
          String query1 = "insert into studcompreg (studregid,compid) values(?,?)";
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object don't support this property.
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This is my html.
I got this from this forum only.
My applet is accessing the system property "user.home".
I ran it in IE
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<br><br>
<script>
if(window.navigator.appName.toLowerCase().indexOf("netscape")!=-1){ // set object for Netscape:
     document.getElementById('dvObjectHolder').innerHTML = " <object ID='appletTest1' classid=\"java:test.class\"" +
"height=\"0\" width=\"0\" onError=\"changeObject();\"" +
          ">" +
"<param name=\"mayscript\" value=\"Y\">" +
"<param name=\"archive\" value=\"sTest.jar\">" +
"</object>";
}else if(window.navigator.appName.toLowerCase().indexOf('internet explorer')!=-1){ //set object for IE
     document.getElementById('dvObjectHolder').innerHTML = "<object ID='appletTest1' classid=\"clsid:8AD9C840-044E-11D1-B3E9-00805F499D93\"" +
          " height=\"0\" width=\"0\" >" +
          " <param name=\"code\" value=\"test.class\" />" +
     "<param name=\"archive\" value=\"sTest.jar\">" +
          " </object>"
</script>
<LABEL id="lblOutputText">This text will be replaced by the applet</LABEL>
<BR>
<input value="Javascript to java" type=button onClick="document.appletTest1.fromJavaScript()">

I tried this example using the repy given to an earlier post.
But its not working with me.
What i did in addition was adding plugin.jar to classpath to import netscape.javascript.*;
Let me add some more details
1) I'll add the stack trace
2) my java progrma
3) batch file to sign the applet.
1) This is the stack trace i don't know whether u will undertand this
load: class test.class not found.
java.lang.ClassNotFoundException: test.class
     at sun.applet.AppletClassLoader.findClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadCode(Unknown Source)
     at sun.applet.AppletPanel.createApplet(Unknown Source)
     at sun.plugin.AppletViewer.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Caused by: java.io.FileNotFoundException: C:\FastranJava\AppletObject\bin\test\class.class (The system cannot find the path specified)
     at java.io.FileInputStream.open(Native Method)
     at java.io.FileInputStream.<init>(Unknown Source)
     at java.io.FileInputStream.<init>(Unknown Source)
     at sun.net.www.protocol.file.FileURLConnection.connect(Unknown Source)
     at sun.net.www.protocol.file.FileURLConnection.getInputStream(Unknown Source)
     at sun.applet.AppletClassLoader.getBytes(Unknown Source)
     at sun.applet.AppletClassLoader.access$100(Unknown Source)
     at sun.applet.AppletClassLoader$1.run(Unknown Source)
     at java.security.AccessController.doPrivileged(Native Method)
     ... 10 more
Exception in thread "Thread-5" java.lang.NullPointerException
     at sun.plugin.util.GrayBoxPainter.showLoadingError(Unknown Source)
     at sun.plugin.AppletViewer.showAppletException(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
2) Java Program
import netscape.javascript.*;
import java.applet.*;
public class test extends Applet
     private JSObject win;
     private JSObject outputLabel;
     private boolean buttonFromJavaClicked=false;
     checkJavaScriptEvent evt=new checkJavaScriptEvent();
     public void init()
          try
               evt.start();
               win=JSObject.getWindow(this);
               outputLabel=(JSObject)win.eval("document.getElementById('lblOutputText')");
               outputLabel.setMember("innerHTML", "<center><h1>From Init<br>Your Home directory" + System.getProperty("user.home") + "</h1></center>");
          catch(Exception e)
               e.printStackTrace();
     public void fromJavaScript()
          buttonFromJavaClicked=true;
     public void fromJavaScript2()
          System.out.println("Started Form JavaScript2");
          try
               String strLbl="<center><h1>From JavaScript<br>Your Homedir:" + System.getProperty("user.home") + "</h1></center>";
               outputLabel.setMember("innerHTML", strLbl);
          catch(Exception e)
               e.printStackTrace();
     class checkJavaScriptEvent extends Thread
          public void run()
               while(true)
                    if(test.this.buttonFromJavaClicked)
                         System.out.println("OK buttonfromjava is true");
                         test.this.buttonFromJavaClicked=false;
                         fromJavaScript2();
                    try
                         Thread.sleep(3000);
                    catch(Exception e)
                         e.printStackTrace();
3) Batch file
del *.cer
del *.com
del *.jar
del *.class
javac -classpath ".;C:\Program Files\Java\jre1.5.0_06\lib\plugin.jar" test.java
keytool -genkey -keystore harm.com -keyalg rsa -dname "CN=Harm Meijer, OU=Technology, O=org, L=Amsterdam, ST=, C=NL" -alias harm -validity 3600 -keypass password -storepass password
jar cf0 test.jar *.class
jarsigner -keystore harm.com -storepass password -keypass password -signedjar sTest.jar test.jar harm
del *.class

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