Giri Regu

Hi,

actually i set the session time out as 30 mins. i have opened the login page browser left idle for 1 min then give the credentials then click the summit button then this exception throws.

"Determine the session ID using a dummy test filter."
can you explain a bit about how to do the above statement

Thanks,
Giridaran

Hi All,

i am developing a application Using MObile JSF. if i keep my page as idle i am getting the below exception

javax.faces.application.ViewExpiredException: viewId:/pages/mobile/login.jsp - View /pages/mobile/login.jsp could not be restored.
at com.sun.faces.lifecycle.RestoreViewPhase.execute(RestoreViewPhase.java:187)
at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.ericsson.sn.mobilefaces.MobileFacesServletFilter.doFilter(MobileFacesServletFilter.java:96)
at com.efici.eficash.client.filter.WapRequestFilter.doFilter(WapRequestFilter.java:37)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)

AT that time my session is not expired i am sure about that.

Pleaes help me on this

Thanks in advance

Hi all,

I am trying to unzip a password protected zip using java.util.zip package.
it throw an error "java.util.zip.ZipException: encrypted ZIP entry not supported".

is there any specific classes to unzip password protected zip file in java?

how can i make this works?

Thanks in advanced,
Giri

Hi all,

i am very new to j2me application devlopment.i want to know about find the memory leaks in j2me application.
could you give brief information to find and fix the memory leaks.

thanks in advance

Hi All,

I just show a webpage(page developed in Drupal-PHP) in jeditor pane. occasionally it prints a message in console likePremature end of JPEG file sometimes its throws exception mentioned below

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at javax.swing.text.html.StyleSheet$ListPainter.paint(Unknown Source)
at javax.swing.text.html.ListView.paintChild(Unknown Source)
at javax.swing.text.BoxView.paint(Unknown Source)
at javax.swing.text.html.BlockView.paint(Unknown Source)
at javax.swing.text.html.ListView.paint(Unknown Source)
at javax.swing.text.BoxView.paintChild(Unknown Source)
at javax.swing.text.BoxView.paint(Unknown Source)
at javax.swing.text.html.BlockView.paint(Unknown Source)
at javax.swing.text.BoxView.paintChild(Unknown Source)
at javax.swing.text.BoxView.paint(Unknown Source)
at javax.swing.text.html.BlockView.paint(Unknown Source)
at javax.swing.text.BoxView.paintChild(Unknown Source)
at javax.swing.text.BoxView.paint(Unknown Source)
at javax.swing.text.html.TableView$RowView.paint(Unknown Source)
at javax.swing.text.html.TableView.paint(Unknown Source)
at javax.swing.text.BoxView.paintChild(Unknown Source)
at javax.swing.text.BoxView.paint(Unknown Source)
at javax.swing.text.html.BlockView.paint(Unknown Source)
at javax.swing.text.BoxView.paintChild(Unknown Source)
at javax.swing.text.BoxView.paint(Unknown Source)
at javax.swing.text.html.BlockView.paint(Unknown Source)
at javax.swing.plaf.basic.BasicTextUI$RootView.paint(Unknown Source)
at javax.swing.plaf.basic.BasicTextUI.paintSafely(Unknown Source)
at javax.swing.plaf.basic.BasicTextUI.paint(Unknown Source)
at javax.swing.plaf.basic.BasicTextUI.update(Unknown Source)
at javax.swing.JComponent.paintComponent(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintWithOffscreenBuffer(Unknown Source)
at javax.swing.JComponent.paintDoubleBuffered(Unknown Source)
at javax.swing.JComponent._paintImmediately(Unknown Source)
at javax.swing.JComponent.paintImmediately(Unknown Source)
at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

i am getting struk to get out of this problem.

i would much appriciate if any body solve this issue

Thanks in Advance
Giridaran

Hi all,

i want to create a Java application which can communicate(send and receive files) with iPod through iTunes.
is there any API available for that?
i dnt know how to start the application.
please help meout of this problem

thanks in advance
Giridaran

Hi all,

i want to create a java application which can able to transfer datas to iPod through iTunes.
i dont know how to start that
please help me regarding this problem.

thanks in advace

Thanks for your reply

I dont have the license.key file for j2me polish.
i am a student. i am trying at my own interest.
how can get that file?


thanks in advance
Giridaran.RS

Hi,

i am new to j2me technologies.
i am tryiny to develop a j2me application using j2me polish in exclips ebvironment.when i try to run the applicatin i got this errr below


j2mepolish:
[j2mepolish] info: the license attribute is no longer supported. Please place your license.key file either to ${project.home} or to ${polish.home}.
[j2mepolish] J2ME Polish 2.0-RC4 (GPL License)
[j2mepolish] Loading device database...
[j2mepolish] Using locale [en_US]...
[j2mepolish] assembling resources for device [Nokia/6020].
[j2mepolish] preprocessing for device [Nokia/6020].
[j2mepolish] nothing to compile for device [Nokia/6020].
[j2mepolish] preverifying for device [Nokia/6020].
[j2mepolish] creating JAR file [D:\Giri\Projects\S60\dist\Nokia-6020-en_US-example.jar].
[j2mepolish] creating JAD file [D:\Giri\Projects\S60\dist\Nokia-6020-en_US-example.jad].
[j2mepolish] Info: Emulator [C:\Nokia\Nokia_S40_DP20_SDK_1_1] not found.
[j2mepolish] Info: Emulator [C:\Nokia\Devices\Nokia_Prototype_SDK_3_0\devices\Prototype_3_0_S40_128x128_MIDP_Emulator] not found.
[j2mepolish] Info: Emulator [C:\Nokia\Devices\S40_SDK_3rd_Edition] not found.
[j2mepolish] Info: Emulator [C:\Nokia\Nokia_S40_DP20_SDK_1_1] not found.
[j2mepolish] Info: Emulator [C:\Nokia\Nokia_S40_DP20_SDK_1_0] not found.
[j2mepolish] Warning: unable to start the emulator: the emulator-skin [Nokia_S40_DP20_SDK_1_1] for the device [Nokia/6020] is not installed.


i am having the Nokia 60 series development kit.
i have configured the gobal.properties with nokia home and choose the nokia home at the time of project creation in eclipse but still i got the same error msg.

This samne error come for sony ericson sdk also.

please drive away from this problem........

Thanks in advance
Giridaran.R

Hi all,
i am doing a sample application in struts with struts validator plug in. it throwing a error while the application loading...
ct 15, 2007 5:49:03 PM org.apache.catalina.core.AprLifecycleListener lifecycleEvent
INFO: The Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jre1.5.0_06\bin;.;C:\WINDOWS\system32;C:\WINDOWS;C:\Program Files\Java\jdk1.5.0_06\bin\..\jre\bin\client;C:\Program Files\Java\jdk1.5.0_06\bin\..\jre\bin;D:\oracle\product\10.1.0\Db_1\bin;C:\Program Files\Java\jdk1.5.0_06\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\Java\jdk1.5.0_06\bin;C:\Program Files\Microsoft SQL Server\80\Tools\BINN;C:\Program Files\Common Files\Teleca Shared;D:\oracle\product\10.1.0\Db_1\orb\bin;C:\Program Files\QuickTime\QTSystem\;C:\Program Files\Apache Software Foundation\Tomcat 5.5\bin;C:\Program Files\Java\jdk1.5.0_06\bin;.;
Oct 15, 2007 5:49:03 PM org.apache.coyote.http11.Http11BaseProtocol init
INFO: Initializing Coyote HTTP/1.1 on http-8080
Oct 15, 2007 5:49:03 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 1110 ms
Oct 15, 2007 5:49:04 PM org.apache.catalina.core.StandardService start
INFO: Starting service Catalina
Oct 15, 2007 5:49:04 PM org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/5.5.25
Oct 15, 2007 5:49:04 PM org.apache.catalina.core.StandardHost start
INFO: XML validation disabled
Oct 15, 2007 5:49:05 PM org.apache.struts.validator.ValidatorPlugIn initResources
INFO: Loading validation rules file from '/WEB-INF/validator-rules.xml'
Oct 15, 2007 5:49:05 PM org.apache.struts.validator.ValidatorPlugIn initResources
INFO: Loading validation rules file from '/WEB-INF/validation.xml'
Oct 15, 2007 5:49:05 PM org.apache.struts.validator.ValidatorPlugIn init
SEVERE: null
java.lang.NullPointerException
at org.apache.commons.validator.ValidatorResources.internalProcessForms(ValidatorResources.java:464)
at org.apache.commons.validator.ValidatorResources.process(ValidatorResources.java:415)
at org.apache.commons.validator.ValidatorResources.<init>(ValidatorResources.java:162)
at org.apache.struts.validator.ValidatorPlugIn.initResources(ValidatorPlugIn.java:233)
at org.apache.struts.validator.ValidatorPlugIn.init(ValidatorPlugIn.java:164)
at org.apache.struts.action.ActionServlet.initModulePlugIns(ActionServlet.java:839)
at org.apache.struts.action.ActionServlet.init(ActionServlet.java:332)
at javax.servlet.GenericServlet.init(GenericServlet.java:168)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1139)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:966)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3956)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4230)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:736)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:448)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:700)
at org.apache.catalina.startup.Catalina.start(Catalina.java:552)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)
Oct 15, 2007 5:49:05 PM org.apache.catalina.core.ApplicationContext log
INFO: Marking servlet action as unavailable
Oct 15, 2007 5:49:05 PM org.apache.catalina.core.StandardContext loadOnStartup
SEVERE: Servlet /AddressBook threw load() exception
javax.servlet.UnavailableException: Cannot load a validator resource from '/WEB-INF/validator-rules.xml,/WEB-INF/validation.xml'
at org.apache.struts.validator.ValidatorPlugIn.init(ValidatorPlugIn.java:174)
at org.apache.struts.action.ActionServlet.initModulePlugIns(ActionServlet.java:839)
at org.apache.struts.action.ActionServlet.init(ActionServlet.java:332)
at javax.servlet.GenericServlet.init(GenericServlet.java:168)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1139)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:966)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3956)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4230)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:736)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:448)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:700)
at org.apache.catalina.startup.Catalina.start(Catalina.java:552)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)
Oct 15, 2007 5:49:05 PM org.apache.coyote.http11.Http11BaseProtocol start
INFO: Starting Coyote HTTP/1.1 on http-8080
Oct 15, 2007 5:49:05 PM org.apache.jk.common.ChannelSocket init
INFO: JK: ajp13 listening on /0.0.0.0:8009
Oct 15, 2007 5:49:05 PM org.apache.jk.server.JkMain start
INFO: Jk running ID=0 time=0/16 config=null
Oct 15, 2007 5:49:05 PM org.apache.catalina.storeconfig.StoreLoader load
INFO: Find registry server-registry.xml at classpath resource
Oct 15, 2007 5:49:05 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 2000 ms


My struts-config.xml

<!DOCTYPE struts-config PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"
"http://jakarta.apache.org/struts/dtds/struts-config_1_2.dtd">

<struts-config>

<form-beans>
<form-bean name="loginform" type="LoginForm"/>
</form-beans>
<action-mappings>
<!-- Action Mapping for Login -->

<action path="/Login" type="LoginAction" name="loginform" validate="true" scope="request" input="/index.jsp">
<forward name="success" path="/jsp/Home.jsp"/>
<forward name="failure" path="/jsp/failure.jsp"/>
</action>
</action-mapping>
<message-resources parameter="org.properties"/>
<plug-in className="org.apache.struts.validator.ValidatorPlugIn">
<set-property property="pathnames" value="/WEB-INF/validator-rules.xml,/WEB-INF/validation.xml" />
</plug-in>
</struts-config>

i have my validation.xml and validation-rules.cml under WEB-INF dir

Validation.xml
<?xml version="1.0" encoding="ISO-8859-1" ?>

<!DOCTYPE form-validation PUBLIC
"-//Apache Software Foundation//DTD Commons Validator Rules Configuration 1.1.3//EN"
"http://jakarta.apache.org/commons/dtds/validator_1_1_3.dtd">

<form-validation>

<!--
This is a minimal Validator form file with a couple of examples.
-->
<global>

<!-- An example global constant
<constant>
<constant-name>maskCode</constant-name>
<constant-value>^[a-zA-Z]{1}[a-zA-Z0-9_]*$</constant-value>
</constant>
end example-->
</global>
<formset>
<!-- An example form -->
<form name="loginform">
<field property="login" depends="required,minlength,maxlength,mask">
<msg name="mask"
key="loginform.usernamemask"/>
<arg0 key="loginform.username"/>
<arg1 key="${var:minlength}" name="minlength" resource="false"/>
<arg1 key="${var:maxlength}" name="maxlength" resource="false"/>
<var>
<var-name>minlength</var-name>
<var-value>5</var-value>
</var>
<var>
<var-name>maxlength</var-name>
<var-value>9</var-value>
</var>
<var>
<var-name>mask</var-name>
<var-value>^[a-zA-Z]{1}[a-zA-Z0-9_]*$</var-value>
</var>
</field>
<field
property="password" depends="required,minlength,maxlength">
<arg0 key="loginform.password"/>
<arg1 key="${var:minlength}"
name="minlength"
resource="false"/>
<arg1 key="${var:maxlength}"
name="maxlength"
resource="false"/>
<var>
<var-name>minlength</var-name>
<var-value>5</var-value>
</var>
<var>
<var-name>maxlength</var-name>
<var-value>9</var-value>
</var>
</field>
</form>

<!-- An example form -->
<!-- An example form -->
</formset>
<!-- An example formset for another locale -->
<formset language="fr">
<constant>
<constant-name>postalCode</constant-name>
<constant-value>^[0-9a-zA-Z]*$</constant-value>
</constant>
<!-- An example form -->
<form name="logonForm">
<field
property="username" depends="required">
<arg key="loginform.username"/>
</field>
<field
property="password" depends="required,mask">
<arg key="loginform.password"/>
<var>
<var-name>mask</var-name>
<var-value>^[0-9a-zA-Z]*$</var-value>
</var>
</field>
</form>

</formset>

</form-validation>

i cant solve this problem
help me please

Thanks in advance
Giridaran.R

hi
i am developing a paint application .in that i draw lines and i can move it . the problem is when i am moving a line then the paint method called and draw all the lines once again. but the lines is not showed properly
here i attached java file.
plese take a look with my coding.
give me a solution
(i am using jdk1.1.8)
thanks in advance.
regards
Giri

import java.awt.Canvas; import java.awt.Frame; import java.awt.Graphics; import java.applet .Applet ; import java.awt.Color ; import java.awt.Label ; import java.awt.Button ; import java.awt .Cursor ; import java.awt .event .*; import java.util .Vector ; import java.util.StringTokenizer ; /** * Program to draw grids. * * <applet code="Grids" height="600" width="800"> </applet> */ class GridsCanvas extends Canvas implements MouseListener,MouseMotionListener { int width, height; int x1,y1,x2,y2;// xy and Y coordinates for Line boolean grid_flag=true;// Grids flag boolean line_flag=false;// Lines Flag Vector vector_Line;// Vector which is used for store Line objects Line line;// Object ref for Line int seti; int Line_No; boolean isMouseDragging=false; //Cursor Declaration Cursor hand; Cursor deft; //Constructor GridsCanvas(int w, int h) { setSize(width = w, height = h); addMouseListener (this); addMouseMotionListener(this); vector_Line=new Vector (); Line_No=0; hand=new Cursor (Cursor.HAND_CURSOR ); deft=new Cursor (Cursor.DEFAULT_CURSOR ); } //Mouse Listener Methods public void mouseClicked(MouseEvent me) { if(line_flag) { line=new Line (); x1=me.getX (); y1=me.getY (); //set the Line Object values line.setX1 (x1); line.setY1 (y1); line.setX2 (x1); line.setY2 (y1+100); // insert the line object in to vector vector_Line.addElement (line); Line_No++;//increment the line no System.out .println ("Object added"+line); //parseVector(vector_Line); line=null; repaint();// call the paint method to paint lines clear();// clear the x and y values } else { repaint(); } } public void mousePressed(MouseEvent me){} public void mouseReleased(MouseEvent me) { if(isMouseDragging) { int new_mx = me.getX(); int new_my = me.getY(); isMouseDragging=false; vector_Line.removeElementAt (getI()); line=new Line (); line.setX1(me.getX ()); line.setY1(me.getY ()); line.setX2(me.getX ()); line.setY2 (me.getY ()+100); vector_Line.addElement (line); line=null; repaint(); } } public void setI(int i) { seti=i; } public int getI() { return seti; } public void clear()// to clear the x and y coordinates { x1=0; x2=0; y1=0; y2=0; } public void mouseEntered(MouseEvent me){} public void mouseExited(MouseEvent me){} //Mouse Motion Listener Methods public void mouseMoved(MouseEvent e) { int mx = e.getX(); int my = e.getY(); Line newLine; for(int i=0;i<vector_Line.size ();i++) { newLine=(Line)vector_Line.elementAt (i); if(mx==newLine.getX1() && my>newLine.getY1() && my<newLine.getY2 ()) { isMouseDragging = true; setCursor(hand); setI(i); break; } else { setCursor(deft); } /*System.out .println (newLine.getX1 ()+" current X value "+mx); System.out .println (newLine.getY1 ()+"Current y1 value "+my); System.out .println (newLine.getY2 ()+"Current y2 value "+my);*/ } } public void mouseDragged(MouseEvent me){} // draw the grid lines in the canvas public void drawDashedLine(Graphics g,int x1,int y1,int x2,int y2, double dashlength, double spacelength) { if((x1==x2)&&(y1==y2)) { g.drawLine(x1,y1,x2,y2); return; } double linelength=Math.sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1)); double yincrement=(y2-y1)/(linelength/(dashlength+spacelength)); double xincdashspace=(x2-x1)/(linelength/(dashlength+spacelength)); double yincdashspace=(y2-y1)/(linelength/(dashlength+spacelength)); double xincdash=(x2-x1)/(linelength/(dashlength)); double yincdash=(y2-y1)/(linelength/(dashlength)); int counter=0; for (double i=0;i<linelength-dashlength;i+=dashlength+spacelength){ g.drawLine((int) (x1+xincdashspace*counter), (int) (y1+yincdashspace*counter), (int) (x1+xincdashspace*counter+xincdash), (int) (y1+yincdashspace*counter+yincdash)); counter++; } if ((dashlength+spacelength)*counter<=linelength) g.drawLine((int) (x1+xincdashspace*counter), (int) (y1+yincdashspace*counter), x2,y2); } // paint method to draw objects public void paint(Graphics g) { Line drawLine; int i; if(grid_flag) { for(i=0;i<width;i+=5) { drawDashedLine(g,i,0,i,width,0.0,5.0 ); } //grid_flag=false; } if(line_flag) { //System.out .println (x1+" "+x2+" "+y1+" "+y2); int k=0; //retrive the values from vector for drawing lines for(k=0;k<vector_Line.size ();k++) { drawLine=(Line)vector_Line.elementAt (k); //System.out .println (drawLine.getX1 ()+" "+drawLine.getY1 ()+" "+drawLine.getX2 ()+" "+drawLine.getY2 ()); g.drawLine (drawLine.getX1 (),drawLine.getY1 (),drawLine.getX2 (),drawLine.getY2 ()); drawLine=null; } line_flag=false; } } } /** This is the demo class. */ public class Grids extends Applet implements ActionListener{ /* * Construct a GfxDemo2 given its title, width and height. Uses a * GridBagLayout to make the Canvas resize properly. */ Label xaxis,yaxis,xvalue,yvalue; Button b_line,undo; GridsCanvas xyz; Graphics g; public void init() { // Now create a Canvas and add it to the Frame. xyz = new GridsCanvas(500, 500); setLayout(null); xaxis=new Label ("X & Y ="); yaxis=new Label ("Y Axis ="); b_line=new Button("Line"); undo=new Button("Undo"); xvalue=new Label("0*0"); yvalue=new Label("0"); xyz.addMouseMotionListener(new MouseMotionAdapter() { public void mouseMoved(MouseEvent e) { Graphics gg=getGraphics(); gg.setColor (Color.red); //showStatus("x = "+e.getX()+" y = "+e.getY ()); xvalue.setText(String.valueOf (e.getX ()/2)+"* "+String.valueOf (e.getY ()/2)); //gg.drawLine (49,e.getY (),35,e.getY ()); } }); xyz.setBounds(50,50,500,500); // Labels positions xaxis.setBounds (50,560,50,20); xvalue.setBounds (110,560,50,20); yaxis.setBounds (190,560,50,20); yvalue.setBounds (270,560,50,20); // buttons positions b_line.setBounds(600,100,75,25); undo.setBounds(600,150,75,25); // add listener to components undo.addActionListener (this); b_line.addActionListener (this); // add components in applet add(b_line); add(undo); add(xaxis); add(xvalue); add(xyz); repaint(); xyz.repaint (); System.out .println ("Init method"); // Normal end ... pack it up! //this.addFocusListener(this); } public void drawGrid() { g=xyz.getGraphics (); xyz.grid_flag =true; int i; for(i=0;i<500;i+=5) { xyz.drawDashedLine(g,i,0,i,500,0.0,5.0 ); } System.out.println ("Start method"); } public void drawLine() { g=xyz.getGraphics (); xyz.line_flag =true; xyz.repaint(); } //Action listener method public void actionPerformed(ActionEvent ae) { g=xyz.getGraphics (); if(ae.getSource ()==undo) { if(xyz.vector_Line .size ()>0) { Object o=xyz.vector_Line .lastElement (); xyz.vector_Line .removeElement(o); xyz.line_flag =true; xyz.repaint (); } } if(ae.getSource ()==b_line) { xyz.line_flag =true; System.out.println ("Action Done"); } } public void stop() { g=xyz.getGraphics (); xyz.grid_flag =true; int i; for(i=0;i<500;i+=5) { xyz.drawDashedLine(g,i,0,i,500,0.0,5.0 ); } System.out .println ("redrawed"); } public void paint(Graphics g) { int i; // draw Ruler inner lines g.drawRect (49,49,502,502); //outer lines g.drawLine (30,30,30,551); g.drawLine(30,551,49,551); g.drawLine (30,30,551,30); g.drawLine (30,30,49,49); g.drawLine (551,30,551,49); //draw cm Lines int k=1; for(i=70;i<550;i+=20) { g.drawLine(50,i,40,i); g.drawLine(i,50,i,40); g.drawString (""+k,i,40); g.drawString (""+k,30,i); k++; } //draw mm lines for(i=50;i<550;i+=2) { g.drawLine (i,52,i,45); g.drawLine (52,i,45,i); } drawLine(); } } Line.java /** * Line is the object used to exchange ticket layout line objects * between the servlet and the applet. Note that it is serializable, * so the servlet and applet Java runtimes deal with transmission * encoding internally. */ public class Line implements java.io.Serializable { private int m_x1; private int m_y1; private int m_x2; private int m_y2; private int m_thickness; /** * No arguments constructor. Initializes members with reasonable * defaults. */ /* private Line() { m_x2 = 0; m_y2 = 0; m_thickness = 1; } * * Normal constructor. Caller provides values for each member field. public Line( int x, int y, int x2, int y2, int thickness ) { super(x, y, 0); // rotation not used for lines m_x2 = x2; m_y2 = y2; m_thickness = thickness; }*/ public Line() { } public int getX1() { return m_x1; } public void setX1(int x1) { m_x1=x1; } public int getY1() { return m_y1; } public void setY1(int y1) { m_y1=y1; } /** * Accessor for line x2 member field * * @return value of x2 field */ public int getX2() { return m_x2; } /** * Mutator for line x2 member field. * * @param x2 value of line x2 member field */ public void setX2( int x2 ) { m_x2 = x2; } /** * Accessor for line y2 member field * * @return value of y2 field */ public int getY2() { return m_y2; } /** * Mutator for line y2 member field. * * @param y2 value of line y2 member field */ public void setY2( int y2 ) { m_y2 = y2; } /** * Accessor for line thickness member field. * * @return value of line thickness setting */ public int getThickness() { return m_thickness; } /** * Mutator for line thickness member field. * * @param thickness value of line thickness setting */ public void setThickness( int thickness ) { m_thickness = thickness; } /** * Overrides Object method. */ public String toString() { return "(" + getX() + "," + getY() + ") (" + getX2() + "," + getY2() + ")"; } }
[ March 14, 2007: Message edited by: Ulf Dittmer ]

hi
thanks craig thanks a lot.
your code is working properly.but i am using jdk1.18 version so the graphics2d and methods in Rectangle class insersectLine() ans setFrameCenter() is not available.
its my mistake to notice about version which i am working. anyway i am trying to convert in lower version . i am unable to understand the usage of rectangle class methods(mentioned above).
if you dont mine please tell me the logic of your program.
sorry for the inconvenence.

thanks and regards
Giridaran.r

import java.applet.*;
import java.awt.*;
import java.awt.event.*;

/**
* <applet code="DrawLine.class" height=500 width=500>
* </applet>
*/

public class DrawLine extends Applet implements ActionListener, MouseListener, MouseMotionListener
{
int width, height;
int x, y; // the coordinates of the upper-left corner of the box
int mx, my; // the most recently recorded mouse coordinates
boolean isMouseDragging = false;
Graphics g;
int flag=0;

public void init() {
width = getSize().width;
height = getSize().height;

setBackground( Color.black );

x = width/2 - 40 ;
y = height/2 - 40;

Button crt_btn = new Button("Create Line");
add(crt_btn);
crt_btn.addActionListener(this);
addMouseListener( this );
addMouseMotionListener( this );
}


public void actionPerformed(ActionEvent e)
{

if(e.getActionCommand()== "Create Line")
{
flag=1;
System.out.println("btn clicked");
repaint();
}
}

public void mouseEntered( MouseEvent e ) { }
public void mouseExited( MouseEvent e ) { }
public void mouseClicked( MouseEvent e ){}
public void mousePressed( MouseEvent e ) {
mx = e.getX();
my = e.getY();
if ( mx > x && mx < x+80 && my == y) {
isMouseDragging = true;
}
e.consume();
}
public void mouseReleased( MouseEvent e ) {
isMouseDragging = false;
e.consume();
}
public void mouseMoved( MouseEvent e ) { }
public void mouseDragged( MouseEvent e ) {
if ( isMouseDragging ) {
// get the latest mouse position
int new_mx = e.getX();
int new_my = e.getY();

// displace the box by the distance the mouse moved since the last event
// Note that "x += ...;" is just shorthand for "x = x + ...;"
x += new_mx - mx;
y += new_my - my;

// update our data
mx = new_mx;
my = new_my;

repaint();
e.consume();
}
}

public void paint( Graphics g ) {
g.setColor( Color.blue );
if(flag==1)
{
g.drawLine( x, y, x+80, y );
}
}
public void update(Graphics g ) {

paint(g);
}
}

this is my program .
in this program i can draw line when click the createline button.
wnen i try to move the line so many lines created in th emoving path.
this is
my first problem

Hi To all

i am developing a paint application in applet.
i am very strange for this applications.
i am facing lot of problems in that.
that is listed below.
1.how to select a particular from morethan one line.
2.how to move line around panel easily
3.how to grow and shrink the selected lines.

please give a solution for the above my questions.

i am developing some initial code for this application thst is below
import java.applet.*; import java.awt.*; import java.awt.event.*; class draw1 extends Canvas { /** * instance variables */ int xbegin=0; int ybegin=0; int xend=0; int yend=0; int Line_No; String drawString =""; public draw1() { Line_No=0; setSize(500,400); } /** * Mouselistener methods */ public boolean mouseUp(Event e,int x,int y) { repaint(); return true; } public boolean mouseDown(Event e,int x,int y) { if(drawString.equals ("Line")) { xbegin=x; ybegin=y; repaint(); } if(drawString.equals("Select")) { System.out .println ("Mouse Down "+x+" "+y); } //drawString=""; return true; } public boolean mouseDrag(Event e,int x,int y) { if(drawString.equals ("Select")) { // displace the box by the distance the mouse moved since the last event // Note that "x += ...;" is just shorthand for "x = x + ...;" // update our data yend = y; repaint(); } return true; } /** * Paint method */ public void update (Graphics g) { paint(g); } public void paint(Graphics g) { if(drawString.equals("Line")) { g.drawLine (xbegin,ybegin,xbegin,ybegin+50); g.fill3DRect(xbegin-2,ybegin,5,5,true); g.fill3DRect (xbegin-2,ybegin+50,5,5,true); } if(drawString.equals("Select")) { g.drawLine (xbegin,ybegin,xbegin,yend); } } } public class draw extends Applet { draw1 d; public void init() { d=new draw1 (); add(d); add(new Button("Line")); add(new Button ("Select")); add (new Button("Copy")); add(new Button("Paste")); } public boolean action(Event ev,Object o) { String label=(String)o; System.out .println ("action method"); if(ev.target instanceof Button) { if(label.equals ("Line")) { d.drawString="Line"; } else if(label.equals ("Select")) { d.drawString="Select"; } else if(label.equals ("Copy")) { } else if(label.equals ("Paste")) { } } return true; } }

using this code we can draw lines and gow also but its not full furnished
.
please help me.

thanks in advance

regards
Giri

[ UD: added code tags ]
[ March 09, 2007: Message edited by: Ulf Dittmer ]

hi
i want to play wav and mp3 songs using java program
i can easily play au audio format files using Audio clip interface
if i tryplay other files it throws unsuppoterfile format exception.
help me please
if any body have sample code thats very help to me
thanks in advance
[ December 04, 2006: Message edited by: Bear Bibeault ]