Type incompatibility error using'remove' method in ArrayList class.

This method:
public int removeFromQueue ( int iIndex )
return queueFeed.remove( new Integer(iIndex) ) ;
returns a type error after remove saying its found a boolean but is looking for an int. I want to remove the int value in the ArrayList and use it elsewhere.
Confused.

A - Yeah I get it now mate.
But the API states that the the object is returned:
"Returns:
the element that was removed from the list. " i.e my
integer value that I know is there
so why does it return a boolean to me. Am I deploying
incorrectly.no, the method you are calling takes an Object as a parameter
look in the docs here for the method remove(Object)
you will see it returns a boolean
http://java.sun.com/j2se/1.4.2/docs/api/java/util/AbstractCollection.html#remove(java.lang.Object)it is a method inherited from AbstractCollection and is different than
the method shown in the javadoc for ArrayList that takes an int
as a parameter.
A
hope this helps

Similar Messages

Type incompatibility error using remove method of ArrayList class

This method:
public int removeFromQueue ( int iIndex )
return queueFeed.remove( new Integer(iIndex) ) ;
returns a type error after remove saying its found a boolean but is looking for an int. I want to remove the int value in the ArrayList and use it elsewhere.
Confused.

if you are trying to remove an element at the particular index say 5
i.e., is int value = 5 then you get the return as Object that has been removed. Since ArrayList hols all obejcts and not any primitive data types.
if you are trying to remove the Object say Integer(5) then you get the return as boolean specifying whether it has been sucessfull or not.
so you can use either of the following as....
// To remove Integer Object from Queue
public boolean removeFromQueue ( int iIndex )
return queueFeed.remove( new Integer(iIndex) ) ;
// To remove Object from Queue at specific position
public Integer removeFromQueue ( int iIndex )
return (Integer)queueFeed.remove( iIndex ) ;
}

Problem using repaint() method from another class

I am trying to make tower of hanoi...but unable to transfer rings from a tower to another...i had made three classes....layout21 where all componentents of frame assembled and provided suitable actionlistener.....second is mainPanel which is used to draw the rods n rings in paintComponent.....and third is tower in which code for hanoi is available...i had made an object of mainPanel at layoout21 n tower but i m not able to call repaint from tower..gives an error : cannot find the symbol....method repaint in tower.
code fragments od three classes are:
LAYOUT21
class layout21 extends JFrame implements ActionListener
{ private Vector rod1 = new Vector();
private Vector rod2 = new Vector();
private Vector rod3 = new Vector();
private String elem; //comment
public String r22;
public boolean in=false;
public int count=0; //no of times the transfer to other rods performed
private int r3,rings; // current no of rings
private JComboBox nor,col;
private JLabel no;
private JLabel moved;
private JLabel no1;
private JButton start;
private JButton ref;
private AboutDialog dialog;
private JMenuItem aboutItem;
private JMenuItem exitItem;
private tower t;
final mainPanel2 p =new mainPanel2();
public layout21()
{ t = new tower();
     Toolkit kit =Toolkit.getDefaultToolkit();
Image img = kit.getImage("java.gif");
setIconImage(img);
setTitle("Tower Of Hanoi");
setSize(615,615);
setResizable(false);
setBackground(Color.CYAN);
     JMenuBar mbar = new JMenuBar();
setJMenuBar(mbar);
JMenu fileMenu = new JMenu("File");
mbar.add(fileMenu);
aboutItem = new JMenuItem("About");
aboutItem.addActionListener(this);
fileMenu.add(aboutItem);
exitItem = new JMenuItem("Exit");
exitItem.addActionListener(this);
fileMenu.add(exitItem);
Container contentPane =getContentPane();
JPanel bspanel = new JPanel();
JPanel bnpanel = new JPanel();
setBackground(Color.CYAN);
     //JComboBox
nor = new JComboBox();
nor.setEditable(false);
nor.addItem("3");
nor.addItem("4");
nor.addItem("5");
nor.addItem("6");
nor.addItem("7");
nor.addItem("8");
nor.addItem("9");
bspanel.add(nor);
col = new JComboBox();
col.setEditable(false);
col.addItem("BLACK");
col.addItem("GREEN");
col.addItem("CYAN");
bspanel.add(col);
JLabel tl = new JLabel("Time");
tl.setFont(new Font("Serif",Font.BOLD,12));
bspanel.add(tl);
JTextField tlag = new JTextField("0",4);
bspanel.add(tlag);
start =new JButton("Start");
bspanel.add(start);
ref =new JButton("Refresh");
bspanel.add(ref);
JButton end =new JButton("End");
bspanel.add(end);
start.addActionListener(this);
nor.addActionListener(this);
col.addActionListener(this);
ref.addActionListener(this);
end.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
dispose(); // Closes the dialog
contentPane.add(bspanel,BorderLayout.SOUTH);
JLabel count = new JLabel("No of Transfer reguired:");
count.setFont(new Font("Serif",Font.BOLD,16));
bnpanel.add(count);
no = new JLabel("7");
no.setFont(new Font("Serif",Font.BOLD,16));
bnpanel.add(no);
JLabel moved = new JLabel("Moved:");
moved.setFont(new Font("Serif",Font.BOLD,16));
bnpanel.add(moved);
no1 = new JLabel("0");
no1.setFont(new Font("Serif",Font.BOLD,16));
bnpanel.add(no1);
contentPane.add(bnpanel,BorderLayout.NORTH);
contentPane.add(p,BorderLayout.CENTER);
     String r = (String)nor.getSelectedItem();
rings = Integer.valueOf(r).intValue();
p.draw(rings,1) ;
public void actionPerformed(ActionEvent evt)
{ Object source = evt.getSource();
if(source == start)
r3 = Integer.valueOf((String)nor.getSelectedItem()).intValue();
p.transfer(false);
t.initialise(rod1,rod2,rod3,0);
t.towerOfHanoi(r3);
     //repaint();
     if(source == ref)
{ rod1.removeAllElements() ;
rod2.removeAllElements() ;
rod3.removeAllElements() ;
count=0;
          r3 = Integer.valueOf((String)nor.getSelectedItem()).intValue();
          p.draw(r3,1);
p.transfer(true);
no1.setText(""+0);
p.trans_vec(rod1,rod2,rod3);
t.initialise(rod1,rod2,rod3,0);
          System.out.println("");
          repaint();
if(source == nor)
{ JComboBox j = (JComboBox)source;
String item = (String)j.getSelectedItem();
int ring1 = Integer.valueOf(item).intValue();
int a=1;
for(int i=1;i<=ring1;i++)
{ a = a*2;
a=a-1;
no.setText(""+a);
p.draw(ring1,1);
repaint();
if(source == aboutItem)
{ if (dialog == null) // first time
dialog = new AboutDialog(this);
dialog.setVisible(true);
if(source == exitItem)
{ System.exit(0);
     if (source==col)
     { JComboBox j = (JComboBox)source;
String item = (String)j.getSelectedItem();
          repaint();
TOWER
class tower extends Thread
{ private Vector rod1 = new Vector();
private Vector rod2 = new Vector();
private Vector rod3 = new Vector();
private int count ;
private String elem;
final mainPanel2 z =new mainPanel2();
public void initialise(Vector r1,Vector r2,Vector r3,int c)
{ rod1 = r1;
rod2 = r2;
     rod3 = r3;
     count =c;
public void towerOfHanoi(int rings)
for(int i=0;i<rings;i++)
rod1.add(" "+(i+1));
System.out.println("rod1:"+rod1.toString());
hanoi(rings,1,2);
public void hanoi(int m,int i, int j)
if(m>0)
{ hanoi(m-1,i,6-i-j);
if(i==1 && j==2 && rod1.isEmpty()==false)
{ count++;
//no1.setText(""+count);
elem = (String)rod1.remove(0);
rod2.add(0,elem);
     //z.trans_vec(rod1,rod2,rod3);
repaint(); //NOT ABLE TO USE METHOD HERE...WHY??
//z.hanoi_paint();
try
          this.sleep(2000);
          catch (Exception e) { e.printStackTrace() ; }
System.out.println(count+". ROD 2:"+rod2.toString());
if(i==1 && j==3 && rod1.isEmpty()==false)
{ count++;
     //no1.setText(""+count);
     elem = (String)rod1.remove(0);
rod3.add(0,elem);
//z.trans_vec(rod1,rod2,rod3);
repaint();//
// z.hanoi_paint();
               try
          this.sleep(2000);
          catch (Exception e) { e.printStackTrace() ; }
System.out.println(count+". ROD 3:"+rod3.toString());
if(i==2 && j==1 && rod2.isEmpty()==false)
{ count++;
     //no1.setText(""+count);
     elem = (String)rod2.remove(0);
rod1.add(0,elem);
//z.trans_vec(rod1,rod2,rod3);
repaint();
//z.hanoi_paint();
try
          this.sleep(2000);
          catch (Exception e) { e.printStackTrace() ; }
System.out.println(count+". ROD 1:"+rod1.toString());
if(i==2 && j==3 && rod2.isEmpty()==false)
{ count++;
     //no1.setText(""+count);
     elem = (String)rod2.remove(0);
rod3.add(0,elem);
//z.trans_vec(rod1,rod2,rod3);
repaint();
//z.hanoi_paint();
try
          this.sleep(2000);
          catch (Exception e) { e.printStackTrace() ; }
System.out.println(count+". ROD 3:"+rod3.toString());
if(i==3 && j==1 && rod3.isEmpty()==false)
{ count++;
     //no1.setText(""+count);
elem = (String)rod3.remove(0);
rod1.add(0,elem);
//z.trans_vec(rod1,rod2,rod3);
repaint();
//z.hanoi_paint();
     try
          this.sleep(2000);
          catch (Exception e) { e.printStackTrace() ; }
System.out.println(count+". ROD 1:"+rod1.toString());
if(i==3 && j==2 && rod3.isEmpty()==false)
{ count++;
     //no1.setText(""+count);
elem = (String)rod3.remove(0);
rod2.add(0,elem);
//z.trans_vec(rod1,rod2,rod3);
repaint();
//z.hanoi_paint();
try
          this.sleep(2000);
          catch (Exception e) { e.printStackTrace() ; }
System.out.println(count+". ROD 2:"+rod2.toString());
hanoi(m-1,6-i-j,j);
MAINPANEL
class mainPanel2 extends JPanel //throws IOException
public Vector line = new Vector();
public Vector rod11= new Vector();
public Vector rod22= new Vector();
public Vector rod33= new Vector();
public int no_ring;
public int rod_no;
String pixel;
StringTokenizer st,st1;
int x,y;
public boolean initial =true;
public void paintComponent(Graphics g)
{ System.out.println("repaint test");
bresenham(100,60,100,360);
     bresenham(101,60,101,360);
bresenham(102,60,102,360);
bresenham(103,60,103,360);
bresenham(104,60,104,360);
g.setColor(Color.BLUE);
while(line.size()>0)
{ pixel = (String)line.remove(0);
st = new StringTokenizer(pixel);
x = Integer.valueOf(st.nextToken()).intValue();
y = Integer.valueOf(st.nextToken()).intValue();
g.drawLine(x,y,x,y);
bresenham(300,60,300,360);
bresenham(301,60,301,360);
bresenham(302,60,302,360);
bresenham(303,60,303,360);
bresenham(304,60,304,360);
while(line.size()>0)
{ pixel = (String)line.remove(0);
st = new StringTokenizer(pixel);
x = Integer.valueOf(st.nextToken()).intValue();
y = Integer.valueOf(st.nextToken()).intValue();
g.drawLine(x,y,x,y);
bresenham(500,60,500,360);
bresenham(501,60,501,360);
bresenham(502,60,502,360);
bresenham(503,60,503,360);
bresenham(504,60,504,360);
while(line.size()>0)
{ pixel = (String)line.remove(0);
st = new StringTokenizer(pixel);
x = Integer.valueOf(st.nextToken()).intValue();
y = Integer.valueOf(st.nextToken()).intValue();
g.drawLine(x,y,x,y);
bresenham(0,361,615,361);//used to get a pixel according to algo.. . func not provided
bresenham(0,362,615,362);
bresenham(0,363,615,363);
bresenham(0,364,615,364);
bresenham(0,365,615,365);
while(line.size()>0)
{ pixel = (String)line.remove(0);
st = new StringTokenizer(pixel);
x = Integer.valueOf(st.nextToken()).intValue();
y = Integer.valueOf(st.nextToken()).intValue();
g.drawLine(x,y,x,y);
if(initial==true)
g.setColor(Color.RED);
for(int i = no_ring;i>0;i--)
{ g.drawLine(100-(i*8),360-(no_ring - i)*10,100+(i*8)+5,360-(no_ring - i)*10);
g.drawLine(100-(i*8),359-(no_ring - i)*10,100+(i*8)+5,359-(no_ring - i)*10);
g.drawLine(100-(i*8),358-(no_ring - i)*10,100+(i*8)+5,358-(no_ring - i)*10);
g.drawLine(100-(i*8),357-(no_ring - i)*10,100+(i*8)+5,357-(no_ring - i)*10);
g.drawLine(100-(i*8),356-(no_ring - i)*10,100+(i*8)+5,356-(no_ring - i)*10);
// draw for each rod
//System.out.println("rod11:"+rod11);
//System.out.println("rod22:"+rod22);
//System.out.println("rod33:"+rod33);
     int r1 = rod11.size();
     int r2 = rod22.size();
     int r3 = rod33.size();
String rd1,rd2,rd3;
int r11,r12,r21,r22,r31,r32;
if(initial == false)
     { g.setColor(Color.RED);
     while(rod11.size()>0)
{ r12 = rod11.size()-1;
          rd1 = (String)rod11.remove(r12);
r11 = Integer.valueOf(rd1).intValue();
g.drawLine(100-((r11+1)*8),360-(r1 - (r11+1))*10,100+((r11+1)*8)+5,360-(r1 - (r11+1))*10);
g.drawLine(100-((r11+1)*8),359-(r1 - (r11+1))*10,100+((r11+1)*8)+5,359-(r1 - (r11+1))*10);
          g.drawLine(100-((r11+1)*8),358-(r1 - (r11+1))*10,100+((r11+1)*8)+5,358-(r1 - (r11+1))*10);
          g.drawLine(100-((r11+1)*8),357-(r1 - (r11+1))*10,100+((r11+1)*8)+5,357-(r1 - (r11+1))*10);
          g.drawLine(100-((r11+1)*8),356-(r1 - (r11+1))*10,100+((r11+1)*8)+5,356-(r1 - (r11+1))*10);
     while(rod22.size()>0)
{ g.setColor(Color.RED);
          r22 = rod22.size()-1;
     System.out.println("TEST *************************:"+r22);
          try
     // e.printStackTrace();
          InputStreamReader isr = new InputStreamReader(System.in);
     BufferedReader br = new BufferedReader(isr)      ;
     br.readLine() ;
     }catch(Exception f) {}
          rd2 = ((String)rod22.remove(r22)).trim();
r21 = Integer.valueOf(rd2).intValue();
g.drawLine(300-((r22+1)*8),360-(r2 - (r22+1))*10,300+((r22+1)*8)+5,360-(r2 - (r22+1))*10);
g.drawLine(300-((r22+1)*8),359-(r2 - (r22+1))*10,300+((r22+1)*8)+5,359-(r2 - (r22+1))*10);
          g.drawLine(300-((r22+1)*8),358-(r2 - (r22+1))*10,300+((r22+1)*8)+5,358-(r2 - (r22+1))*10);
          g.drawLine(300-((r22+1)*8),357-(r2 - (r22+1))*10,300+((r22+1)*8)+5,357-(r2 - (r22+1))*10);
          g.drawLine(300-((r22+1)*8),356-(r2 - (r22+1))*10,300+((r22+1)*8)+5,356-(r2 - (r22+1))*10);
     while(rod33.size()>0)
{ g.setColor(Color.RED);
          r32 = rod33.size()-1;
          rd3 = (String)rod33.remove(r32);
r31 = Integer.valueOf(rd3).intValue();
g.drawLine(500-((r32+1)*8),360-(r3 - (r32+1))*10,500+((r32+1)*8)+5,360-(r3 - (r32+1))*10);
g.drawLine(500-((r32+1)*8),359-(r3 - (r32+1))*10,500+((r32+1)*8)+5,359-(r3 - (r32+1))*10);
          g.drawLine(500-((r32+1)*8),358-(r3 - (r32+1))*10,500+((r32+1)*8)+5,358-(r3 - (r32+1))*10);
          g.drawLine(500-((r32+1)*8),357-(r3 - (r32+1))*10,500+((r32+1)*8)+5,357-(r3 - (r32+1))*10);
          g.drawLine(500-((r32+1)*8),356-(r3 - (r32+1))*10,500+((r32+1)*8)+5,356-(r3 - (r32+1))*10);
why i m not able to use repaint() method in tower class? from where i can use repaint() method

i can't read your code - not formatted with code tags
I have no chance of getting it to compile (AboutDialog class?? p.draw() ??)
here's a basic routine - add a couple of things to this to demonstrate what is not
being redrawn
(compare the readability of below code (using tags) to yours)
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class Testing extends JFrame
public Testing()
    setSize(400,300);
    setLocation(400,300);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    final DrawPanel dp = new DrawPanel();
    JButton btn = new JButton("Change Text Location/Repaint");
    getContentPane().add(dp,BorderLayout.CENTER);
    getContentPane().add(btn,BorderLayout.SOUTH);
    btn.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent ae){
        dp.x = (int)(Math.random()*300);
        dp.y = (int)(Math.random()*150)+50;
        repaint();}});
public static void main(String[] args){new Testing().setVisible(true);}
class DrawPanel extends JPanel
int x = 50, y = 50;
public void paintComponent(Graphics g)
    super.paintComponent(g);
    g.drawString("Hello World",x,y);
}

Creating user view using 'createView' method of RemoteSession class

Hi
I am trying to create a user view using createView method of RemoteSesson class.
the code is as follows:
remoteSession = (RemoteSession)SessionFactory.getSession(REMOTE_HOST, ADMIN_ID, encryptedPassword);
HashMap map = new HashMap();
map.put("type", "User");
map.put("viewId", "User");
GenericObject obj =
remoteSession.createView("#ID#3DA2A7588B5510DC:-4D08423:10AAD335A14:-7FEE", map);
I get the following error on the server side:
WavesetException: Missing object type
com.waveset.util.WavesetException: Missing object type
     at com.waveset.util.WavesetException.checkBreakpoint(WavesetException.java:366)
     at com.waveset.util.WavesetException.<init>(WavesetException.java:133)
     at com.waveset.rpc.GenericMessageHandler.createView(Unknown Source)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at com.waveset.rpc.GenericMessageHandler.request(Unknown Source)
     at com.waveset.rpc.SimpleRpcHandler.doRequest(SimpleRpcHandler.java:164)
     at com.waveset.rpc.SimpleRpcHandler.doRequest(SimpleRpcHandler.java:128)
     at org.openspml.server.SOAPRouter.doPost(SOAPRouter.java:500)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
     at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
     at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
     at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
     at java.lang.Thread.run(Thread.java:595)
Could anyone tell me what is wrong with this code?
Thanks!

hi carlos,
yes it is possible. as a reference please have a look at this document How to Reference External JAR Files in Web Dynpro DC in SAP NW Portal 7.3
basically the steps are the same (adding dependency, public parts, etc.) for a ejb or java project.
regards,
christian

Error when calling method INIT in class cl_hrxss_rem for salary statements

after configuring the our hrform to work with the new ess system in ecc 6.0 we configured the hrfor decision tree to $cedt$ and pointed the form variant to the edtin feature.
Now we are getting a class error.
com.sap.pcuigp.xssfpm.java.FPMRuntimeException: Error when calling method INIT of class CL_HRXSS_REM
     at com.sap.pcuigp.xssfpm.java.MessageManager.raiseException(MessageManager.java:111)
     at com.sap.pcuigp.xssfpm.java.MessageManager.raiseException(MessageManager.java:121)
     at com.sap.xss.hr.rep.fcrfw.FcRepFramework.reportBapiRet2Error(FcRepFramework.java:525)
     at com.sap.xss.hr.rep.fcrfw.FcRepFramework.callRfcExecAction(FcRepFramework.java:374)
     at com.sap.xss.hr.rep.fcrfw.FcRepFramework.initModel(FcRepFramework.java:292)
     at com.sap.xss.hr.rep.fcrfw.wdp.InternalFcRepFramework.initModel(InternalFcRepFramework.java:256)
     at com.sap.xss.hr.rep.fcrfw.FcRepFrameworkInterface.initModel(FcRepFrameworkInterface.java:136)
     at com.sap.xss.hr.rep.fcrfw.wdp.InternalFcRepFrameworkInterface.initModel(InternalFcRepFrameworkInterface.java:198)
     at com.sap.xss.hr.rep.fcrfw.wdp.InternalFcRepFrameworkInterface$External.initModel(InternalFcRepFrameworkInterface.java:258)
     at com.sap.xss.hr.rem2.selection.VcRem2Selection.onInit(VcRem2Selection.java:245)
     at com.sap.xss.hr.rem2.selection.wdp.InternalVcRem2Selection.onInit(InternalVcRem2Selection.java:249)
     at com.sap.xss.hr.rem2.selection.VcRem2SelectionInterface.onInit(VcRem2SelectionInterface.java:161)
     at com.sap.xss.hr.rem2.selection.wdp.InternalVcRem2SelectionInterface.onInit(InternalVcRem2SelectionInterface.java:144)
     at com.sap.xss.hr.rem2.selection.wdp.InternalVcRem2SelectionInterface$External.onInit(InternalVcRem2SelectionInterface.java:220)
     at com.sap.pcuigp.xssfpm.wd.FPMComponent.doProcessEvent(FPMComponent.java:564)
     at com.sap.pcuigp.xssfpm.wd.FPMComponent.doEventLoop(FPMComponent.java:438)
     at com.sap.pcuigp.xssfpm.wd.FPMComponent.wdDoInit(FPMComponent.java:196)
     at com.sap.pcuigp.xssfpm.wd.wdp.InternalFPMComponent.wdDoInit(InternalFPMComponent.java:110)
     at com.sap.tc.webdynpro.progmodel.generation.DelegatingComponent.doInit(DelegatingComponent.java:108)
     at com.sap.tc.webdynpro.progmodel.controller.Controller.initController(Controller.java:215)
     at com.sap.tc.webdynpro.progmodel.controller.Controller.init(Controller.java:200)
     at com.sap.tc.webdynpro.clientserver.cal.ClientComponent.init(ClientComponent.java:430)
     at com.sap.tc.webdynpro.clientserver.cal.ClientApplication.init(ClientApplication.java:362)
     at com.sap.tc.webdynpro.clientserver.session.ApplicationSession.initApplication(ApplicationSession.java:748)
     at com.sap.tc.webdynpro.clientserver.session.ApplicationSession.doProcessing(ApplicationSession.java:283)
     at com.sap.tc.webdynpro.clientserver.session.ClientSession.doApplicationProcessingPortal(ClientSession.java:733)
     at com.sap.tc.webdynpro.clientserver.session.ClientSession.doApplicationProcessing(ClientSession.java:668)
     at com.sap.tc.webdynpro.clientserver.session.ClientSession.doProcessing(ClientSession.java:250)
     at com.sap.tc.webdynpro.clientserver.session.RequestManager.doProcessing(RequestManager.java:149)
     at com.sap.tc.webdynpro.clientserver.session.core.ApplicationHandle.doProcessing(ApplicationHandle.java:73)
     at com.sap.tc.webdynpro.portal.pb.impl.AbstractApplicationProxy.sendDataAndProcessActionInternal(AbstractApplicationProxy.java:860)
     at com.sap.tc.webdynpro.portal.pb.impl.AbstractApplicationProxy.create(AbstractApplicationProxy.java:220)
     at com.sap.portal.pb.PageBuilder.updateApplications(PageBuilder.java:1246)
     at com.sap.portal.pb.PageBuilder.createPage(PageBuilder.java:354)
     at com.sap.portal.pb.PageBuilder.init(PageBuilder.java:547)
     at com.sap.portal.pb.PageBuilder.wdDoRefresh(PageBuilder.java:591)
     at com.sap.portal.pb.PageBuilder$1.doPhase(PageBuilder.java:822)
     at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.processPhaseListener(WindowPhaseModel.java:755)
     at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.doPortalDispatch(WindowPhaseModel.java:717)
     at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.processRequest(WindowPhaseModel.java:136)
     at com.sap.tc.webdynpro.clientserver.window.WebDynproWindow.processRequest(WebDynproWindow.java:335)
     at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:143)
     at com.sap.tc.webdynpro.clientserver.session.ApplicationSession.doProcessing(ApplicationSession.java:313)
     at com.sap.tc.webdynpro.clientserver.session.ClientSession.doApplicationProcessing(ClientSession.java:684)
     at com.sap.tc.webdynpro.clientserver.session.ClientSession.doProcessing(ClientSession.java:250)
     at com.sap.tc.webdynpro.clientserver.session.RequestManager.doProcessing(RequestManager.java:149)
     at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:62)
     at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doPost(DispatcherServlet.java:53)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:401)
     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:266)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:387)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:365)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:944)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:266)
     at com.sap.engine.services.httpserver.server.Client.handle(Client.java:95)
     at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:175)
     at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33)
     at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41)
     at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
     at java.security.AccessController.doPrivileged(Native Method)
     at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:100)
     at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:170)
Thanks

Hi,
Maintain the EDTIN feature
&CEDT$
And UR problem solve

Use a method from another class in another package?

How can I use a method from another class in another package?

WhiteJ wrote:
What do you mean by "new keyword?" You posted this previously:
I tried that, it seems to not be working. I want to use the constructor from the other class. I imported it, using this piece of code:
import components.FileChooser;
components.FileChoser();
Typically if I am going to call a constructor on a class called Fubar, I'd use new to create a new object:
Fubar myFubar = new Fubar();Incidently, is it a simple typo in your post or are you trying to use a FileChoser object when it should be FileChooser?

Forbit use of method forName of Class

I have some JAVA applications running in iPlanet Application Server (iAS). I need that the connection to database was only by the pool of iAS and nobody can use:
Class.forName("oracle.jdbc.driver.OracleDriver"); to connect to DB.
How can forbit use of method forName of Class?

You can't.

How do I gain type safety with a generic method taking a class object?

How do I achieve type safety with the following code without getting a compile error?
import java.util.ArrayList;
import java.util.List;
public class Main {
    public static void main(String[] args) throws Exception {
        ListenerHolder th = new ListenerHolder();
        List<TestObject<String>> list = createTestObjectList();
        /* *** compiler error here *** */
        th.addListener(TestObject.class, list);
    private final static List<TestObject<String>> createTestObjectList() {
        List<TestObject<String>> list = new ArrayList<TestObject<String>>();
        return list;
    private final static class ListenerHolder {
            /* *** my generic method *** */
            public <T> void addListener(Class<T> listenerType, List<T> listener) { }
    private final static class TestObject<T> { }
}The compiler error is:
C:\java\Main.java:11: <T>addListener(java.lang.Class<T>,java.util.List<T>) in Main.ListenerHolder cannot be applied to (java.lang.Class<Main.TestObject>,java.util.List<Main.TestObject<java.lang.String>>)
Thanks in advance,
Dan

dandubois wrote:
Thanks for the help, that is exactly what I wanted to know.
It didn't occur to me that TestObject<T> would in some respects be considered as an 'extends' of TestObject as I know the compiler converts them all back to plain TestObjects.Maybe I should have written TestObject<?>, to make it more obvious. There's some supertype/subtype relation diagram in the Generics FAQ somewhere, if you need more detailed information.
In the end, I think jtahlborn's solution might be more appropriate in the described scenario, so you should go for it.

How to use protected method of a class in application

Hi,
will u please tell me how to use protected method of class in application. (class:cl_gui_textcontrol, method:limit_text)
Thanks in advance,
Praba.

Hi Prabha,
You can set the maximum number of characters in a textedit control in the CREATE OBJECT statement itself.
Just see the first parameter in the method . I mean MAX_NUMBER_CHARS. Just set that value to the required number.
Eg:
data: edit type ref to CL_GUI_TEXTEDIT.
create object edit
exporting
    MAX_NUMBER_CHARS       = 10
   STYLE                  = 0
   WORDWRAP_MODE          = WORDWRAP_AT_WINDOWBORDER
   WORDWRAP_POSITION      = -1
   WORDWRAP_TO_LINEBREAK_MODE = FALSE
   FILEDROP_MODE          = DROPFILE_EVENT_OFF
    parent                 = OBJ_CUSTOM_CONTAINER
   LIFETIME               =
   NAME                   =
EXCEPTIONS
    ERROR_CNTL_CREATE      = 1
    ERROR_CNTL_INIT        = 2
    ERROR_CNTL_LINK        = 3
    ERROR_DP_CREATE        = 4
    GUI_TYPE_NOT_SUPPORTED = 5
    others                 = 6
IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
           WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
In this case, the max: number of characters will be set to 10.
I hope your query is solved.
Regards,
SP.

Can I use object methods in a class

I have a class ball and I am in the process of creating it's move method. I want this method to make the ball move depending on certain factors.
One of these factors being where a bar has been stopped. I have a bar class which extends JProgressBar and when stopped, produces a number. I want this number to be available to my ball class in some way so it can use it to determine how far the ball has to move. The number can be output using its method getValue() but I am unsure how this can be used by another class.
I doubt this is possible, but I am sure there are ways to achieve what I want. Any help on this subject would be great.

Methods in one class can call methods defined in another class, subject to access restrictions (public, protected, package-private). This is pretty basic, so you should be able to get the meat of it from your text or tutorial. Look there, or in the following for explanations and examples, and post again if you can't get your code to work.
http://java.sun.com/docs/books/tutorial/
http://java.sun.com/learning/new2java/index.html
http://javaalmanac.com
http://www.jguru.com
http://www.javaranch.com
Bruce Eckel's Thinking in Java
Joshua Bloch's Effective Java
Bert Bates and Kathy Sierra's Head First Java

Using a method of a class within an action event

Good day.
A beginner question.
It is possible to use within an action event (triggered by a view of the button)
instantiate a class from another java project and use a method?
If it is possible how to do?
Thank you

hi carlos,
yes it is possible. as a reference please have a look at this document How to Reference External JAR Files in Web Dynpro DC in SAP NW Portal 7.3
basically the steps are the same (adding dependency, public parts, etc.) for a ejb or java project.
regards,
christian

Problem with remove() method of ArrayList collection

Dear All,
I have a program below: See the statement in bold
//Start of the Program
import java.util.*;
public class ArrayListTest
     public static void main(String args[])
          //declare an arraylist of type String
          List<String> stringStorage = new ArrayList<String>();
          //add elements to the ArrayList
          stringStorage.add("apple");
          stringStorage.add("banana");
          stringStorage.add("papaya");
          stringStorage.add("peach");
          stringStorage.add("cucumber");
          stringStorage.add("orange");
          stringStorage.add("grapes");
          stringStorage.add("plum");
          stringStorage.add("chiku");
          stringStorage.add("pomegrenate");
          stringStorage.add("pomegrenate2");
          //iterate through the ArrayList
          Iterator<String> iterate = stringStorage.iterator();
          //test whether an element is present
          boolean isPresent = stringStorage.contains("xxx");
          System.out.println("xxx is Present "+isPresent);
          //remove an element from the ArrayList
Line no: 12     System.out.println("Remove apple:(true/false)"+stringStorage.remove("apple"));
          Loop:
          for (int i=0;i<stringStorage.size();i++)
               while (iterate.hasNext()==true)
                    System.out.println("Element in the arraylist["+i+"] "+iterate.next());
                    //iterate.remove();
                    continue Loop;
End of Outer Loop:
//End of the Program
It compiles fine. But when I try to run , it gives a unchecked exception in main ConcurrentModificationException.
Exception in thread "main" java.util.ConcurrentModificationException
at java.util.AbstractList$Itr.checkForComodification(Unknown Source)
at java.util.AbstractList$Itr.next(Unknown Source)
at ArrayListTest.main(ArrayListTest.java:48)
But, if I remove Line no 12(in bold), or put the same statement after End of Outer Loop: , I do not get the error. Can you explain this phenomenon?

look what you do:
1/ you retrieve the iterator
2/ you remove apple
3/ you browse the iterator
but actually, the iterator kept a reference to the "apple" you just removed ; that s why it gets screwed ;
you mustn't operate on the list if you re not over with the iterator work

Pop Up Error using MVC method after Validation in DO_HANDLE_EVENT Method

Hi Experts,.
I am rather new to BSP applications and I am working using MVC at the moment. I have a requirement which apparently is simple, but am yet to get that done successfully.
I have a couple of buttons on my BSP View screen, on click of these buttons, the User Name would be verified with entries in a Custom table and if the User Name is not found, an error message would pop up stating, "You are not Authorized to use this option".
On click of the button, the event which is triggered is handled in the DO_HANDLE_EVENT Method of the Controller for the view.
The check is performed in that method. Thereafter the method DO_REQUEST follows automatically which loads the view yet again. I want to throw a pop up error message at this instance if the User Name was not the authorized one.
I have used Java Script to throw pop up message but only in case of field content validation where I did not need to navigate away from the view for the validations. But how do I bo about for this example.
Any help would be highly appreciated.
Regards,
Subhrangsu

Hi
1. You can call the view in pop-up because you will be calling the controller using open.window.
Here is the sample code:
method DO_REQUEST .
data:
        li_vw           type ref to   if_bsp_page,
        lv_form_field   type          string,
        li_md           type ref to   zcl_model01.
dispatch_input( ).
li_md ?= get_model( 'm01' ).
lv_form_field = request->get_form_field( 'invoice_create' ).
if lv_form_field is initial.
*------ Request to display main page
    li_vw = create_view( view_name = 'main.htm' ).
    li_vw->set_attribute( name = 'model' value = li_md ).
    call_view( li_vw ).
elseif lv_form_field eq 'true'.
*------ Request to display Invoice page in pop-up
    li_vw = create_view( view_name = 'invoice.htm' ).
    li_vw->set_attribute( name = 'model' value = li_md ).
    call_view( li_vw ).
endif.
endmethod.
Layout :
   function do_Invoice()
      { var s=0; r=1; w=300; h=300; x=screen.width/2;
        x=x-w/2;
        var y=screen.height/4;
        y=y-h/2;
        popUp=window.open('main.do?invoice_create=true','win','width='+ w
        +',height='+ h +', left=' + x +',top='+ y +');
Regards,
G. Nikhil Kumar

Error using a method call in the starting conditions of a Workflow

Hi,
In SRM 4, I have a doubt about a start condition with WFWS14000109 I need to trigger the WF depending on organizational unit of the requester (not purchase group or purchase organization).
I have seen in the editor, in SWB_COND in the part of requisitionerUser the Method ReadOrgUnit.
I change to traditional mode of the editor and when I select the method I get in Express1. field
&_EVT_OBJECT.REQUISITIONERUSER.READORGUNIT(_RESULT='OBEG';ACTORGUNIT= )&
If I use = and the organizational unit in express2 field I get error
Partial expression expected (expression '&_EVT_OBJECT_REQUISITIONERUSER.READORGUNIT(_RESULT',position 76)
Can anybody say me where is the error? how I should express the condition.
Thanks
Best Regards

I don't think you can use a BOR method in a condition. At least not as far as I know. I think it would be better to create a virtual attribute in your delegated subtype of BUS2121 and use that in the condition.
Regards,
Martin

Error using contains method of vector

Hi
I am trying to find if a value in one vector in present in another vector.I try to do the following.But I get an error
Vector2 is the outer vector which holds all the values
and vector 3 holds the current value that I am trying to search in the larger vector
for (int i = 0;i <= myVector2.size();i++)
     if (myVector2.contains(myVector3(i)))
          {out.println("sucess"); }
          else {out.println("failure");}
Thanks
Arn

Well, You cannot use vector(i) to access the element. You should use vector.elementAt(i), and it will work.

Type incompatibility error using'remove' method in ArrayList class.

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