Call Java Class and Methods from ABAP

Hi
I install de JCo, But how i can call java class and methods from ABAP?. somebody has an example?
The tutorial say that's is possible, but don't explain how do that?
Thanks.
Angel G. Hurtado

If you need only simple java program, you do not need to install JCo. The following codes can call java class.
DATA: COMMAND TYPE STRING VALUE 'C:\j2sdk1.4.2_08\bin\java',
      DIR TYPE STRING VALUE D:\eclipse\workspace',
      PARAMETER TYPE STRING VALUE 'Helloworld'. "here the name of your java program
CALL METHOD CL_GUI_FRONTEND_SERVICES=>EXECUTE
   EXPORTING
     APPLICATION = COMMAND
     PARAMETER = PARAMETER
     DEFAULT_DIRECTORY = DIR
   MAXIMIZED =
     MINIMIZED = 'X'     "If you need the DOS window to be minimized
EXCEPTIONS
    CNTL_ERROR = 1
    ERROR_NO_GUI = 2
    BAD_PARAMETER = 3
    FILE_NOT_FOUND = 4
    PATH_NOT_FOUND = 5
    FILE_EXTENSION_UNKNOWN = 6
    ERROR_EXECUTE_FAILED = 7
    OTHERS = 8.
Tell me if it works.
Nuno.

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Calling a class's method from another class

Hi, i would like to know if it's possible to call a Class's method and get it's return from another Class. This first Class doesn't extend the second. I've got a Choice on this first class and depending on what is selected, i want to draw a image on the second class witch is a Panel extended. I put the control "if" on the paint() method of the second class witch is called from the first by the repaint() (first_class.repaint()) on itemStateChanged(). Thankx 4 your help. I'm stuck with this.This program is for my postgraduation final project and i'm very late....

import java.awt.*;
import java.sql.*;
* This type was generated by a SmartGuide.
class Test extends Frame {
     private java.awt.Panel ivjComboPane = null;
     private java.awt.Panel ivjContentsPane = null;
     IvjEventHandler ivjEventHandler = new IvjEventHandler();
     private Combobox ivjCombobox1 = null;
class IvjEventHandler implements java.awt.event.WindowListener {
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          public void windowClosed(java.awt.event.WindowEvent e) {};
          public void windowClosing(java.awt.event.WindowEvent e) {
               if (e.getSource() == Test.this)
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          public void windowDeactivated(java.awt.event.WindowEvent e) {};
          public void windowDeiconified(java.awt.event.WindowEvent e) {};
          public void windowIconified(java.awt.event.WindowEvent e) {};
          public void windowOpened(java.awt.event.WindowEvent e) {};
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* Combo constructor comment.
public Test() {
     super();
     initialize();
* Combo constructor comment.
* @param title java.lang.String
public Test(String title) {
     super(title);
* Insert the method's description here.
* Creation date: (11/16/2001 7:48:51 PM)
* @param s java.lang.String
public void conexao(String s) {
     try {
          Class.forName("oracle.jdbc.driver.OracleDriver");
          String url = "jdbc:oracle:thin:system/[email protected]:1521:puc";
          Connection db = DriverManager.getConnection(url);
          //String sql_str = "SELECT * FROM referencia";
          Statement sq_stmt = db.createStatement();
          ResultSet rs = sq_stmt.executeQuery(s);
          ivjCombobox1.addItem("");
          while (rs.next()) {
               String dt = rs.getString(1);
               ivjCombobox1.addItem(dt);
          db.close();
     } catch (SQLException e) {
          System.out.println("Erro sql" + e);
     } catch (ClassNotFoundException cnf) {
* connEtoC1: (Combo.window.windowClosing(java.awt.event.WindowEvent) --> Combo.dispose()V)
* @param arg1 java.awt.event.WindowEvent
/* WARNING: THIS METHOD WILL BE REGENERATED. */
private void connEtoC1(java.awt.event.WindowEvent arg1) {
     try {
          // user code begin {1}
          // user code end
          this.dispose();
          // user code begin {2}
          // user code end
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* Return the Combobox1 property value.
* @return Combobox
/* WARNING: THIS METHOD WILL BE REGENERATED. */
private Combobox getCombobox1() {
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     return ivjCombobox1;
* Return the ComboPane property value.
* @return java.awt.Panel
/* WARNING: THIS METHOD WILL BE REGENERATED. */
private java.awt.Panel getComboPane() {
     if (ivjComboPane == null) {
          try {
               ivjComboPane = new java.awt.Panel();
               ivjComboPane.setName("ComboPane");
               ivjComboPane.setLayout(null);
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* Return the ContentsPane property value.
* @return java.awt.Panel
/* WARNING: THIS METHOD WILL BE REGENERATED. */
private java.awt.Panel getContentsPane() {
     if (ivjContentsPane == null) {
          try {
               ivjContentsPane = new java.awt.Panel();
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               // user code begin {1}
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* Return the Panel1 property value.
* @return Panel
/* WARNING: THIS METHOD WILL BE REGENERATED. */
private Panel getPanel1() {
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* Called whenever the part throws an exception.
* @param exception java.lang.Throwable
private void handleException(java.lang.Throwable exception) {
     /* Uncomment the following lines to print uncaught exceptions to stdout */
     // System.out.println("--------- UNCAUGHT EXCEPTION ---------");
     // exception.printStackTrace(System.out);
* Initializes connections
* @exception java.lang.Exception The exception description.
/* WARNING: THIS METHOD WILL BE REGENERATED. */
private void initConnections() throws java.lang.Exception {
     // user code begin {1}
     // user code end
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* Initialize the class.
/* WARNING: THIS METHOD WILL BE REGENERATED. */
private void initialize() {
     try {
          // user code begin {1}
          // user code end
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          setLayout(new java.awt.BorderLayout());
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          setTitle("Combo");
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* Insert the method's description here.
* Creation date: (11/17/2001 2:02:58 PM)
* @return java.lang.String
public String readCombo() {
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     return dado;
* Starts the application.
* @param args an array of command-line arguments
public static void main(java.lang.String[] args) {
     try {
          /* Create the frame */
          Test aTest = new Test();
          /* Add a windowListener for the windowClosedEvent */
          aTest.addWindowListener(new java.awt.event.WindowAdapter() {
               public void windowClosed(java.awt.event.WindowEvent e) {
                    System.exit(0);
          aTest.setVisible(true);
     } catch (Throwable exception) {
          System.err.println("Exception occurred in main() of Test");
          exception.printStackTrace(System.out);
* Insert the type's description here.
* Creation date: (11/17/2001 1:59:15 PM)
* @author:
class Combobox extends java.awt.Choice {
     public java.lang.String dado;
* Combobox constructor comment.
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     super();
     initialize();
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* @param exception java.lang.Throwable
private void handleException(java.lang.Throwable exception) {
     /* Uncomment the following lines to print uncaught exceptions to stdout */
     // System.out.println("--------- UNCAUGHT EXCEPTION ---------");
     // exception.printStackTrace(System.out);
* Initialize the class.
/* WARNING: THIS METHOD WILL BE REGENERATED. */
private void initialize() {
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* main entrypoint - starts the part when it is run as an application
* @param args java.lang.String[]
public static void main(java.lang.String[] args) {
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          Combobox aCombobox;
          aCombobox = new Combobox();
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          frame.setSize(aCombobox.getSize());
          frame.addWindowListener(new java.awt.event.WindowAdapter() {
               public void windowClosing(java.awt.event.WindowEvent e) {
                    System.exit(0);
          frame.setVisible(true);
     } catch (Throwable exception) {
          System.err.println("Exception occurred in main() of Combobox");
          exception.printStackTrace(System.out);
* Insert the type's description here.
* Creation date: (11/17/2001 2:16:11 PM)
* @author:
class Panel extends java.awt.Panel {
* Panel constructor comment.
public Panel() {
     super();
     initialize();
* Panel constructor comment.
* @param layout java.awt.LayoutManager
public Panel(java.awt.LayoutManager layout) {
     super(layout);
* Called whenever the part throws an exception.
* @param exception java.lang.Throwable
private void handleException(java.lang.Throwable exception) {
     /* Uncomment the following lines to print uncaught exceptions to stdout */
     // System.out.println("--------- UNCAUGHT EXCEPTION ---------");
     // exception.printStackTrace(System.out);
* Initialize the class.
/* WARNING: THIS METHOD WILL BE REGENERATED. */
private void initialize() {
     try {
          // user code begin {1}
          // user code end
          setName("Panel");
          setLayout(null);
          setSize(260, 127);
     } catch (java.lang.Throwable ivjExc) {
          handleException(ivjExc);
     // user code begin {2}
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* main entrypoint - starts the part when it is run as an application
* @param args java.lang.String[]
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     try {
          java.awt.Frame frame = new java.awt.Frame();
          Panel aPanel;
          aPanel = new Panel();
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          frame.setSize(aPanel.getSize());
          frame.addWindowListener(new java.awt.event.WindowAdapter() {
               public void windowClosing(java.awt.event.WindowEvent e) {
                    System.exit(0);
          frame.setVisible(true);
     } catch (Throwable exception) {
          System.err.println("Exception occurred in main() of java.awt.Panel");
          exception.printStackTrace(System.out);
* Insert the method's description here.
* Creation date: (11/17/2001 2:18:36 PM)
public void paint(Graphics g) {
/* Here's the error:
C:\Test.java:389: non-static method readCombo() cannot be referenced from a static context
     System.out.println(Test.lerCombo());*/
     System.out.println(Test.readCombo());

Problem calling AS3 class's methods from Flex Project

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Duplicate message.
type persistance.DBManager not found
Add a Dependency on the Model project in the View project. In Project Properties select the Dependencies node to add dependencies.
Edited by: dvohra16 on Jun 19, 2011 8:37 AM

Reg : Classes And Methods In ABAP HR

Hii...
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Try look for any SAP Note or create Customer Message to SAP. It's clearly Program Error. We can't collect "lcl_transform" class into Transport Request Independently as it was local Class not Global Class.
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It is never advisable to store large data sets in the session. But it will depend on a lot of factors:
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Read item from Java class and call to stored function/procedure of database

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===
Edited by: Zakir Hossain on Mar 29, 2009 10:22 AM

---

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<CODE>
REPORT ZTESTRAD_WD.
FIELD-SYMBOLS <p9106> TYPE p9106.
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    container_tab   = infty_container_tab
    is_ok           = w_ok.
CATCH cx_hrpa_violated_assertion .
   WRITE :/ 'Infotype could not be read'.
ENDTRY.
*" Fill the local structure with container data:
loop at infty_container_tab into container.
    it9106_container ?= container.
    TRY.
    CALL METHOD it9106_container->primary_record_ref
      IMPORTING
        pnnnn_ref = p9106_ref.
     CATCH cx_hrpa_violated_assertion .
    ENDTRY.
    ASSIGN p9106_ref->* to <p9106>.
    write :/ <p9106> .
endloop.
*" Just change some field values of the record
<p9106>-C1name2 = 'Test name'.
<p9106>-C2name2 = 'Test name 2 3 4'.
data : return TYPE BAPIRETURN1,
       return1 TYPE BAPIRETURN1.
*CALL FUNCTION 'BAPI_EMPLOYEE_ENQUEUE'
EXPORTING
   number        = <p9106>-pernr
IMPORTING
RETURN        = return1
*PERFORM do_nothing(sapfp50p).
The container itself is modified
container ?= it9106_container->modify_primary_record( <p9106> ).
CREATE OBJECT message_list.
the invocation - errors are always fatal !!!
DATA : lx_exception TYPE REF TO cx_root,
         update_mode type HRPAD_UPDATE_MODE,
         massn type massn,
         massg type massg.
TRY.
      CALL METHOD ref_class->IF_HRPA_INFTY_BL~MODIFY(
        EXPORTING
           old_container =                   it9106_container
           massn                          = massn
           massg                         = massg
           update_mode =                 update_mode
           no_auth_check =                   'X'
           message_handler =                 message_list
        IMPORTING
           is_ok =                           w_ok
        CHANGING
           container =                       container
    CATCH cx_hrpa_violated_assertion INTO lx_exception.
      RAISE EXCEPTION TYPE cx_wd_no_handler
        EXPORTING previous = lx_exception.
ENDTRY.
</CODE>
I have also tried by instantiating the cl_hrpa_masterdata_bl and then calling the methods on that object...... makes no difference.
I used this link to proceed with the modifications:
http://help.sap.com/saphelp_erp2005/helpdata/en/43/21d2254bba2bebe10000000a1553f7/frameset.htm
The funny thing is that the WHOLE logic executes without any error messages or dumps or anything. I have now debugged almost every line of code that these methods call. PA30 works just fine. HR_INFOTYPE_OPERATION does not .. that's a whole differnt story.

Putting code to my Jsf and Jsff pages and calling Java class

I want guidance on how to write simple code on adf pages
1. I have adf pages (.jsf and .jsff) where I have input text fields and command buttons, I want to put custom code on the command button such that when you click on any of the buttons at runtime, the code will be executed.
2. In my application, I have a java class which I have written, I need to click on any of the buttons at runtime, the application will call the java class and execute the class. Essentially, taking parameters from my adf page(s) (.jsf and .jsff) to the java class and also returning parameters after execution.

The version of my Jdev. is 11.1.2.3.0
Which docs?.... I will be grateful if you can point to the particular doc fro me.
1) Can you pls tell me in one of few sentences how to add method and set the actionListener property.
2) in question number 2, I am totally lost... Let me explain my self again to clarify the situation. In my adf page, I have a button and three input texts,my purpose is that at runtime, when a user click on the button, the values in the first two input texts will be passed to the java class as parameters, it is expected to use these parameters to process some form of calculations and return a value which I will place on the third input field.

How do I call an Application Module method from a EntityImpl class?

Guys and Gals,
Using Studio Edition Version 11.1.1.3.0.
I've got a price update form, that when submitted, takes the part numbers and prices in the form and updates the corresponding Parts' price in the Parts table. Anytime this Parts view object's ReplacementPrice attribute is changed, an application module method needs to be called which updates a whole slew of related view objects. I know you can modify view objects via associations (How do I call an Application Module method from a ViewObjectImpl class? but that's not what I'm trying to do. These AppModuleImpl methods are the hub for all price updates, as many different operations may affect related pricing (base price lists, price buckets, etc) and hence, call the updatePartPricing(key) method.
For some reason, the below code does not call / run / activate the application module's method. The AppModuleDataControl exists and recordPartHistory(key) is registered and public. At runtime, the am.<method> code is simply ignored, and as a weird side-effect, I cannot navigate out of my current page flow.
public void setReplacementPrice(Number value)
    setAttributeInternal(REPLACEMENTPRICE, value);
    AppModuleImpl am = (AppModuleImpl)this.getDBTransaction().findApplicationModule("AppModuleDataControl");
    Key key = new Key(new Object[]
        { getPartNumber() });
    am.recordPartHistory(key); // AppModuleImpl method which records pricing history
    am.updatePartPricing(key); // AppModuleImpl method which updates a whole slew of related pricing tables
}Any ideas?

Thanks Timo.
Turns out the code provided was correct, but the AppModuleImpl method being called was not. A dependent ViewObject wasn't returning the row I was expecting. I then tried to perform some operations on that row, which in turn ... just stopped everything, but didn't give me an error.
It was the lack of the error that threw me off. I had never messed with calling an AppModuleImpl method from the EntityImpl so I assumed that's what was messing up.
You are correct. It is available from the ViewRow, but I thought it better to put it in the EntityImpl. This method will be called every time the replacement cost is modified. If I didn't put it in the EntityImpl, I'd have to remember to call it every time a replacement cost changed.

Error while trying to call Java Class from Peoplecode

Gurus,
I am trying to read a property file from peoplecode using standard java classes. However, I am getting this error more than one overload matches
Below are 2 ways in which I tried doing this and both ended up in the same error
Code 1>_
     Local JavaObject &file = CreateJavaObject("java.io.File", "D:\\psft.properties");
     Local JavaObject &properties = CreateJavaObject("java.util.Properties");
     Local JavaObject &reader = CreateJavaObject("java.io.FileReader", &file);
     &properties.load(); Error thrown : "Calling Java java.io.FileReader.<init>: more than one overload matches"
Code 2>_
     Local JavaObject &file = CreateJavaObject("java.io.File", "D:\\psft.properties");
     Local JavaObject &properties = CreateJavaObject("java.util.Properties");
     Local JavaObject &properyFile = CreateJavaObject("java.io.FileInputStream", &file);
     &properties.load();
Error thrown : "Calling Java java.io.FileInputStream.<init>: more than one overload matches."
The above error is thrown on the 3rd line when I try to invoke the FileInputStream or FileReader class/constructor.
In fact both the above code pieces work absolutely fine when I write them into a java class and run them on a java runtime. Any inputs would be of great help !! Alternatively, I will have to use peoplecode file.readline(), etc to read the property file. Since java has this smarter way to reading a property file, I thought of giving it a try ..
-Sudripta

I tested this on one of my windows servers using PT 8.50:
Local JavaObject &joCurrFile = CreateJavaObject("java.io.File", "c:/temp/test-date.txt");
Local JavaObject &jlongtime = CreateJavaObject("java.util.Date");
Local number &modifytime = &jlongtime.getTime();
MessageBox(0, "", 0, 0, "original time: " | &joCurrFile.lastModified());
Local boolean &filemodified = &joCurrFile.setLastModified(&modifytime);
MessageBox(0, "", 0, 0, "&modifytime: " | &modifytime, "");
MessageBox(0, "", 0, 0, "&filemodified: " | &filemodified, "");
MessageBox(0, "", 0, 0, "new time: " | &joCurrFile.lastModified());Here are the results:
PeopleTools 8.50.05 - Application Engine
Copyright (c) 1988-2010 PeopleSoft, Inc.
All Rights Reserved
original time: 1287677026144 (0,0)
Message Set Number: 0
Message Number: 0
Message Reason: original time: 1287677026144 (0,0) (0,0)
&modifytime: 1287677277845 (0,0)
Message Set Number: 0
Message Number: 0
Message Reason: &modifytime: 1287677277845 (0,0) (0,0)
&filemodified: True (0,0)
Message Set Number: 0
Message Number: 0
Message Reason: &filemodified: True (0,0) (0,0)
new time: 1287677277845 (0,0)
Message Set Number: 0
Message Number: 0
Message Reason: new time: 1287677277845 (0,0) (0,0)
Application Engine program DSS_TEST_IO ended normallyDoes your app server have permissions to modify the files you are trying to modify? Also, how did you verify the date/time of the files? Were you using Windows Explorer? Did you refresh the view first? Or did you use the console dir/ls? I seriously doubt there is a security manager in place that would restrict what you can do with Java. Security managers are common in applets/browser context, but not in apps.

Call Java Class and Methods from ABAP

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