The BigDecimal class
Hi there,
I have Core Java2 put out by Sun and I just finished reading up on the use of the BigDecimal class. I think I want to implement it in my code b/c I'm losing accuracy when I'm multiplying doubles but the text isn't very clear and I don't fully understand what the BigDecimal class will do. Does it just ensure complete accuracy when performing math on two doubles? Any clarification would be appreciated.
jjmclell
Complete accuracy is impossible because somenumbers
can't be represented inside computers.Technically speaking, you can represent all numbers,
even irrational numbers inside a computer just as
well as we can represent them on a notebook or
blackboard.
But anyway your advice was still good :)Well, yeah; you could define a number system with symbols to represent transcendental numbers, etc., infinity with different cardinalities, etc., whatever you need. Of course, you could only represent a finite number of these representations. I think this is a little bit out of the scope of what the OP was asking, though.
Similar Messages
-
I was using Gregory-Leibniz series to calculate PI = 4 - 4/3 + 4/5 - 4/7 + 4/9 - 4/11 + ...
Something like:
double pi = 0.0;
int limit = 3000000;
for (int i = 0, y = 1; i <= limit; y+=2, i++)
if (y == 1)
pi = 4;
else if (i % 2 == 0)
pi += (double)4/y;
else
pi -= (double)4/y;
System.out.println(String.format("Loop %d: %.20f", i, pi)); }Then I realized PI isn't going to be totally accurate according to IEEE Standard for Binary Floating-Point Arithmetic that java math calculation uses, so I was trying to use BigDecimal class (new to me), this is what I got initally...
BigDecimal pi = new BigDecimal("0.00");
int limit = 3000000;
for (int i = 0, y = 1; i <= limit; y += 2, i++)
if (y == 1)
pi = new BigDecimal("4.0");
else if (i % 2 == 0)
pi = pi.add(new BigDecimal( Double.toString( (double) 4 / y )));
else
pi = pi.subtract(new BigDecimal( Double.toString( (double) 4 / y )));
System.out.println(String.format("Loop %d: %s", i, pi.toString()));
I realize that when I do the 4/y calculations involving both doubles... the result is probably stored according to the IEEE standards which is the thing to avoid... Is that correct? Is my PI result going to be accurate?
I noticed with this one decimals up to the 22nd place are all filled with some numbers in the calculations compared with the first one involving only double number calculations which had zero's starting around the 15th decimal.
Something like doesn't work and ends up with arithmeticexceptions...
pi = pi.subtract(new BigDecimal("4").divide(new BigDecimal(Integer.toString(y))));
So I'm actually confused about the right way of using BigDecimal class in this type of calculation to get accurate results. I do realize it's an immutable class and probably a bad idea to use it like this 3 million times in a loop.quoting from the API documentation on BigDecimal
"The BigDecimal class gives its user complete control over rounding behavior. If no rounding mode is specified and the exact result cannot be represented, an exception is thrown; otherwise, calculations can be carried out to a chosen precision and rounding mode by supplying an appropriate MathContext object to the operation."
That explains the arithmetic exceptions.
You would be advised to choose your scale first, (that would be the number of decimal places that you want to be using for your calculation. ) Then use the BigDecimal constructors that use the scale value. Construct your BigDecimal 4 outside of the loop so that you are not constructing it over and over again. And finally, read the documentation on how the scale of the result will depend upon the scale of the components going in.
A little reading and possibly re-reading of the documentation will help in the understanding of the BigDecimal class. -
Unable to compile the java class in the SQL PLUS
Hi Team,
I am unable to compile the java class in the SQL PLUS in dev1 and dev2. It is giving the following error.
But the same class get Compiled in the Toad(Tool) without any error and working fine. Could someone help me
What to do for this for your reference ,Attaching the java class file.
“ORA-29536: badly formed source: Encountered "<EOF>" at line 1, column 28.
Was expecting one of:
----------------------Here is the Java class Code.....................
create or replace and compile java source named "XXVM_ZipFileUtil_Ela"
as
import java.math.BigDecimal;
import java.util.zip.Deflater;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
import oracle.sql.*;
import oracle.jdbc.*;
import java.sql.*;
import java.io.*;
public class XXVM_ZipFileUtil_Ela
public static oracle.sql.BLOB getZipFile(
oracle.sql.CHAR zipFilePathCHAR, oracle.sql.CHAR zipFileNameCHAR,
int fileBufferSize, int zipFileBufferSize,
boolean deleteZipFile, java.sql.Array fileNames, java.sql.Array fileContents, java.sql.Array fileContentsLength)
throws IllegalArgumentException, FileNotFoundException, IOException, java.sql.SQLException
String zipFilePath = (zipFilePathCHAR == null) ? null : zipFilePathCHAR.stringValue();
String zipFileName = (zipFileNameCHAR == null) ? null : zipFileNameCHAR.stringValue();
String zipPathAndFileName = new String(
new String(zipFilePath == null || zipFilePath == "" ? "/tmp/" : zipFilePath) +
new String(zipFileName == null || zipFileName == "" ? System.currentTimeMillis() + ".zip" : zipFileName));
byte[] buffer = new byte[fileBufferSize == 0 ? 100000000 : fileBufferSize];
try
Connection conn = DriverManager.getConnection("jdbc:default:connection:");
oracle.sql.CLOB[] fileContentsCLOB = (oracle.sql.CLOB[])fileContents.getArray();
String[] fileNamesString = (String[])fileNames.getArray();
BigDecimal[] fileContentsLengthNumber = (BigDecimal[])fileContentsLength.getArray();
ZipOutputStream zipOut = new ZipOutputStream(new FileOutputStream(zipPathAndFileName));
zipOut.setLevel(Deflater.DEFAULT_COMPRESSION);
for (int i = 0; i < fileNamesString.length; i++) {
System.out.println(i);
zipOut.putNextEntry(new ZipEntry(fileNamesString));
InputStream asciiStream = fileContentsCLOB[i].getAsciiStream(1L);
int asciiReadCount = asciiStream.read(buffer,0,fileContentsLengthNumber[i].intValue());
zipOut.write(buffer, 0, fileContentsLengthNumber[i].intValue());
zipOut.closeEntry();
zipOut.close();
byte zipFileContents[] = new byte[zipFileBufferSize == 0 ? 100000000 : zipFileBufferSize];
FileInputStream zipIn = new FileInputStream(zipPathAndFileName);
int byteCount = zipIn.read(zipFileContents);
zipIn.close();
byte returnFileContents[] = new byte[byteCount];
System.arraycopy(zipFileContents,0,returnFileContents,0,byteCount);
String returnFileContentsString = new String(returnFileContents);
if (deleteZipFile)
boolean deletedFile = (new File(zipPathAndFileName)).delete();
oracle.sql.BLOB returnFileContentsBLOB = null;
returnFileContentsBLOB = BLOB.createTemporary(conn, true, BLOB.DURATION_SESSION);
returnFileContentsBLOB.open(BLOB.MODE_READWRITE);
//OutputStream tempBlobWriter = returnFileContentsBLOB.getBinaryOutputStream();
OutputStream tempBlobWriter = returnFileContentsBLOB.setBinaryStream(1);
tempBlobWriter.write(returnFileContents);
tempBlobWriter.flush();
tempBlobWriter.close();
returnFileContentsBLOB.close();
return returnFileContentsBLOB;
catch (IllegalArgumentException ex) {
ex.printStackTrace();
throw ex;
catch (FileNotFoundException ex) {
ex.printStackTrace();
throw ex;
catch (IOException ex)
ex.printStackTrace();
throw ex;
catch (java.sql.SQLException ex)
ex.printStackTrace();
throw ex;860411 wrote:
Hi Team,
I am unable to compile the java class in the SQL PLUS in dev1 and dev2. It is giving the following error.
But the same class get Compiled in the Toad(Tool) without any error and working fine. Could someone help me
What to do for this for your reference ,Attaching the java class file.
“ORA-29536: badly formed source: Encountered "<EOF>" at line 1, column 28.
Was expecting one of:
I believe the error message is clear and self-explanatory.
----------------------Here is the Java class Code.....................
create or replace and compile java source named "XXVM_ZipFileUtil_Ela"
as
import java.math.BigDecimal;
import java.util.zip.Deflater;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
import oracle.sql.*;
import oracle.jdbc.*;
import java.sql.*;
import java.io.*;
public class XXVM_ZipFileUtil_Ela
public static oracle.sql.BLOB getZipFile(
oracle.sql.CHAR zipFilePathCHAR, oracle.sql.CHAR zipFileNameCHAR,
int fileBufferSize, int zipFileBufferSize,
boolean deleteZipFile, java.sql.Array fileNames, java.sql.Array fileContents, java.sql.Array fileContentsLength)
throws IllegalArgumentException, FileNotFoundException, IOException, java.sql.SQLException
String zipFilePath = (zipFilePathCHAR == null) ? null : zipFilePathCHAR.stringValue();
String zipFileName = (zipFileNameCHAR == null) ? null : zipFileNameCHAR.stringValue();
String zipPathAndFileName = new String(
new String(zipFilePath == null || zipFilePath == "" ? "/tmp/" : zipFilePath) +
new String(zipFileName == null || zipFileName == "" ? System.currentTimeMillis() + ".zip" : zipFileName));
byte[] buffer = new byte[fileBufferSize == 0 ? 100000000 : fileBufferSize];
try
Connection conn = DriverManager.getConnection("jdbc:default:connection:");
oracle.sql.CLOB[] fileContentsCLOB = (oracle.sql.CLOB[])fileContents.getArray();
String[] fileNamesString = (String[])fileNames.getArray();
BigDecimal[] fileContentsLengthNumber = (BigDecimal[])fileContentsLength.getArray();
ZipOutputStream zipOut = new ZipOutputStream(new FileOutputStream(zipPathAndFileName));
zipOut.setLevel(Deflater.DEFAULT_COMPRESSION);
for (int i = 0; i < fileNamesString.length; i++) {
System.out.println(i);
zipOut.putNextEntry(new ZipEntry(fileNamesString));
InputStream asciiStream = fileContentsCLOB[i].getAsciiStream(1L);
int asciiReadCount = asciiStream.read(buffer,0,fileContentsLengthNumber[i].intValue());
zipOut.write(buffer, 0, fileContentsLengthNumber[i].intValue());
zipOut.closeEntry();
zipOut.close();
byte zipFileContents[] = new byte[zipFileBufferSize == 0 ? 100000000 : zipFileBufferSize];
FileInputStream zipIn = new FileInputStream(zipPathAndFileName);
int byteCount = zipIn.read(zipFileContents);
zipIn.close();
byte returnFileContents[] = new byte[byteCount];
System.arraycopy(zipFileContents,0,returnFileContents,0,byteCount);
String returnFileContentsString = new String(returnFileContents);
if (deleteZipFile)
boolean deletedFile = (new File(zipPathAndFileName)).delete();
oracle.sql.BLOB returnFileContentsBLOB = null;
returnFileContentsBLOB = BLOB.createTemporary(conn, true, BLOB.DURATION_SESSION);
returnFileContentsBLOB.open(BLOB.MODE_READWRITE);
//OutputStream tempBlobWriter = returnFileContentsBLOB.getBinaryOutputStream();
OutputStream tempBlobWriter = returnFileContentsBLOB.setBinaryStream(1);
tempBlobWriter.write(returnFileContents);
tempBlobWriter.flush();
tempBlobWriter.close();
returnFileContentsBLOB.close();
return returnFileContentsBLOB;
catch (IllegalArgumentException ex) {
ex.printStackTrace();
throw ex;
catch (FileNotFoundException ex) {
ex.printStackTrace();
throw ex;
catch (IOException ex)
ex.printStackTrace();
throw ex;
catch (java.sql.SQLException ex)
ex.printStackTrace();
throw ex;
The last two lines above should be
/Srini -
How to generate the java classes of the database tables
Hi,
I am using Sun One 4 update1 CE for generate java classes of tables from an Oracle database. I have got the database schema file. However, when I right clicked on the database schema file, there is no selection for "Generate Java...".
Besides, when I was trying to use database Schema template from the project tab in the explore window by double click on the project, after following all the procedures of inputing the database url, driver, uername, password, and select the table to generate, the following exception came out:
Tue Jan 28 16:22:28 PST 2003: java.lang.NullPointerException: Posted StackTrace
Annotation: Exception occurred in Request Processor
org.openide.util.RequestProcessor$Holder: Posted StackTrace(task org.netbeans.core.ModuleActions$1@e4b7d3 [-31035, 1, -1])
at org.openide.util.RequestProcessor$Holder.fillInStackTrace(RequestProcessor.java:300)
at java.lang.Throwable.<init>(Throwable.java:195)
at java.lang.Exception.<init>(Exception.java:41)
at org.openide.util.RequestProcessor$Holder.<init>(RequestProcessor.java:280)
at org.openide.util.RequestProcessor$Task.createHolder(RequestProcessor.java:333)
at org.openide.util.RequestProcessor.post(RequestProcessor.java:100)
at org.openide.util.RequestProcessor.post(RequestProcessor.java:73)
at org.netbeans.core.ModuleActions.invokeAction(ModuleActions.java:123)
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:324)
at org.openide.explorer.view.TreeView.invokeAction(TreeView.java:878)
at org.openide.explorer.view.TreeView$PopupSupport.mouseClicked(TreeView.java:958)
at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:208)
at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:207)
at java.awt.Component.processMouseEvent(Component.java:5096)
at java.awt.Component.processEvent(Component.java:4890)
at java.awt.Container.processEvent(Container.java:1566)
at java.awt.Component.dispatchEventImpl(Component.java:3598)
at java.awt.Container.dispatchEventImpl(Container.java:1623)
at java.awt.Component.dispatchEvent(Component.java:3439)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3450)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3174)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3095)
at java.awt.Container.dispatchEventImpl(Container.java:1609)
at java.awt.Window.dispatchEventImpl(Window.java:1585)
at java.awt.Component.dispatchEvent(Component.java:3439)
[catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:450)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:197)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:144)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)
Tue Jan 28 16:22:28 PST 2003: java.lang.NullPointerException: <no message>
java.lang.NullPointerException
at org.netbeans.modules.projects.ProjectDataObject.add(ProjectDataObject.java:204)
at org.netbeans.modules.projects.AddNewAction.performAction(AddNewAction.java:88)
at org.openide.util.actions.NodeAction.actionPerformed(NodeAction.java:167)
at org.netbeans.core.ModuleActions$1.run(ModuleActions.java:105)
at org.openide.util.Task.run(Task.java:152)
[catch] at org.openide.util.RequestProcessor$ProcessorThread.run(RequestProcessor.java:622)
Any suggestions to the solution of these problems are greatly appreciated. Thanks.
Yi-Xiongyou also could use this to generate java beans out of database tables:
* Convert SQL type code to corresponding Java class.
* @param sqlType One of java.sql.Types.xxx.
* @return Class that corresponds to the given type.
public static Class toClass(int sqlType) {
Class result = null;
switch (sqlType) {
case Types.BIGINT :
case Types.INTEGER :
case Types.SMALLINT :
case Types.TINYINT :
result = Integer.class;
break;
case Types.BIT :
case Types.BOOLEAN :
result = Boolean.class;
break;
case Types.CHAR :
result = Character.class;
break;
case Types.DATE :
case Types.TIMESTAMP :
result = java.util.Date.class;
break;
case Types.DECIMAL :
case Types.DOUBLE :
case Types.FLOAT :
result = BigDecimal.class;
break;
case Types.NULL :
result = null;
break;
case Types.LONGVARCHAR :
case Types.VARCHAR :
default :
result = String.class;
break;
return result;
}//toClass()
* Create a Java bean (source file) to map a database table. The class name is the table name, the bean
* properties are the table columns. Each column will result in a property with a corresponding set() and
* get() method.
* @param connection Database connection to load table from.
* @param tableName Name of table to create the bean for.
* @param packageName Name of package for Java class.
* @param className Name of Java class to create.
* @param superClass Optional name of super class.
* @return Java source of container class.
* @throws SQLException, IOException
* @see <a href="http://java.sun.com/blueprints/corej2eepatterns/Patterns/DataAccessObject.html">Data Access Object </a>
public static String getTableBean(Connection connection, String tableName, String packageName, String className, String superClass)
throws SQLException, IOException {
String result = null;
if (connection != null && tableName != null) {
//read table columns:
DatabaseMetaData dmd = connection.getMetaData();
ResultSet resultSet = dmd.getColumns(null, "%", tableName, null);
Properties props = new Properties();
if (resultSet != null) {
while (resultSet.next()) { //for each table
String name = resultSet.getString("COLUMN_NAME");
int type = resultSet.getInt("DATA_TYPE");
props.setProperty(name, ""+type);
}//next table
}//else: resultSet unavailable
Set imports = new HashSet();
StringBuffer sb1 = new StringBuffer(); //fields
StringBuffer sb2 = new StringBuffer(); //methods
StringBuffer sb3 = new StringBuffer(); //toString()
Enumeration enum = props.keys();
while (enum.hasMoreElements()) {
String columnName = (String) enum.nextElement();
//change first character of column name to lower case:
String fieldName = columnName.substring(0, 1).toLowerCase() + columnName.substring(1);
//datat type:
String stype = props.getProperty(columnName, ""+Types.VARCHAR);
int type = (new Integer(stype)).intValue();
Class javaClass = toClass(type);
String typeName = "String"; //default
if (javaClass != null) {
String javaClassName = javaClass.getName();
int lastDot = javaClassName.lastIndexOf('.');
if (lastDot >= 0) {
typeName = javaClassName.substring(lastDot + 1);
if (!javaClassName.startsWith("java.lang.")) {
imports.add(javaClassName);
//field:
sb1.append(" /** ");
sb1.append(columnName);
sb1.append(" */\n");
sb1.append(" private ");
sb1.append(typeName);
sb1.append(" ");
sb1.append(fieldName);
sb1.append(" = null;\n");
//toString() method:
sb3.append(" sb.append(\",");
sb3.append(fieldName);
sb3.append("=\");\n");
sb3.append(" sb.append(");
sb3.append(fieldName);
sb3.append(");\n");
//set method:
sb2.append(" /**\n");
sb2.append(" * Set ");
sb2.append(columnName);
sb2.append(".\n *\n * @param value ");
sb2.append(columnName);
sb2.append(" to set.\n");
sb2.append(" */\n");
sb2.append(" public void set");
sb2.append(columnName);
sb2.append("(");
sb2.append(typeName);
sb2.append(" value) {\n ");
sb2.append(fieldName);
sb2.append(" = value;\n }\n\n");
//get method:
sb2.append(" /**\n");
sb2.append(" * Get ");
sb2.append(columnName);
sb2.append(".\n *\n * @return ");
sb2.append(columnName);
sb2.append(".\n */\n");
sb2.append(" public ");
sb2.append(typeName);
sb2.append(" get");
sb2.append(columnName);
sb2.append("() {\n");
sb2.append(" return ");
sb2.append(fieldName);
sb2.append(";\n }\n\n");
}//next column
//build class source code:
StringBuffer sb = new StringBuffer();
sb.append("/* $Header: /data/iComps/icf/prg/java/src/de/icomps/sql/JDBCUtils.java 9 24.10.03 14:25 Hilpert $ */\n");
sb.append("package ");
sb.append(packageName);
sb.append(";\n\n");
//import statements:
Iterator iterator = imports.iterator();
while (iterator.hasNext()) {
String jcn = (String) iterator.next();
sb.append("import ");
sb.append(jcn);
sb.append(";\n");
if (imports.size() > 0) {
sb.append("\n");
//class:
sb.append("/**\n");
sb.append(" * Container class to store data of one record (row) of table '"+tableName+"'.\n");
sb.append(" *\n");
sb.append(" * @version $Revision: 9 $ ($Date: 24.10.03 14:25 $)\n");
sb.append(" * @author $Author: Hilpert $\n");
sb.append(" */\n");
sb.append("public class ");
sb.append(className);
if (superClass != null) {
sb.append(" extends ");
sb.append(superClass);
sb.append(" {\n\n");
//fields:
sb.append(sb1.toString());
//methods:
sb.append("\n\n");
sb.append(sb2.toString()); //methods
//overwrite toString() method:
sb.append(" /**\n");
sb.append(" * Overwrite super.\n");
sb.append(" *\n * @return String representation of the object.\n");
sb.append(" */\n");
sb.append(" public String toString() {\n");
sb.append(" StringBuffer sb = new StringBuffer(super.toString());\n\n");
sb.append(sb3.toString());
sb.append("\n return sb.toString();\n");
sb.append(" }\n\n");
sb.append("}//"+className);
result = sb.toString();
}//else: input unavailable
return result;
}//getTableBean() -
Previewing an image before uploading it using the FileReference class
Previewing an image before uploading it using the FileReference class in flash player 3 not in SDK4
Previewing an image before uploading it using the FileReference class in flash player 3 not in SDK4
-
Previewing an image before uploading it using the FileReference class in flex 3
Previewing an image before uploading it using the FileReference class in flex 3 ?
hai,
when this code is used in my application ,i got the name of image and new frame is added each time .But image is not displayed.....
The code starts like this
<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx" initialize="init()" backgroundColor="white" width="100%" height="100%">
<fx:Script>
<![CDATA[
import mx.controls.Alert;
import mx.messaging.Channel;
import mx.messaging.ChannelSet;
import mx.messaging.channels.AMFChannel;
import mx.rpc.events.ResultEvent;
import mx.controls.Image;
import spark.events.IndexChangeEvent;
import mx.managers.DragManager;
<mx:DataGridColumn headerText="Dimension Value" width="10" dataField="dimensionValue"/>
<mx:DataGridColumn headerText="Unit Nmae" width="10" dataField="dimensionUnitName"/>
</mx:columns>
</mx:DataGrid>
<mx:Spacer width="2%"/>
</mx:HDividedBox>
</mx:VBox>
<mx:Spacer height="0"/>
<mx:VBox width="100%">
<s:HGroup height="90" top="0" left="0" right="0" verticalAlign="justify" gap="10" paddingLeft="5" paddingRight="5" paddingTop="5" paddingBottom="5">
<s:Button id="btn_loader" top="5" bottom="24" width="100" label="load" click="loadImages()"/>
<s:Group width="100%">
<s:Group name="cl" top="0" left="0" bottom="0" width="20" mouseOver="//scroll_on(event)" mouseOut="//scroll_off(event)">
<s:BitmapImage source="@Embed('../assets/left.jpg')" top="0" left="0" bottom="0" right="0" fillMode="scale"/>
</s:Group>
<s:List id="imgList" skinClass="skins.ListSkin" top="-3" left="27" right="28" bottom="10"
dataProvider="{ImageCollection}" itemRenderer="Image_Render">
<s:layout>
<s:HorizontalLayout gap="0"/>
</s:layout>
</s:List>
<s:Group name="cr" top="0" right="0" bottom="0" width="20" mouseOver="//scroll_on(event)" mouseOut="//scroll_off(event)">
<s:BitmapImage source="@Embed('../assets/right.jpg')" top="-1" left="0" bottom="0" right="0" fillMode="scale"/>
</s:Group>
</s:Group>
</s:HGroup>
<s:SkinnableContainer id="dropCanvas" top="100" left="5" right="5" bottom="5" backgroundAlpha="1.0" alpha="1.0"
dragEnter="dropCanvas_dragEnterHandler(event)"
dragDrop="dropCanvas_dragDropHandler(event)" contentBackgroundColor="#914E4E" backgroundColor="#F7F7F7">
</s:SkinnableContainer>
</mx:VBox>
<mx:Spacer height="5"/>
</mx:VDividedBox>
</mx:Panel>
</mx:Canvas> -
Get the values from the bean class?
Hi Praveen and all can u please suggest in this,
I have developped an application In that Create One java class that Extends PageProcesscomponenet and utilizing the Bean That have the Connetion method and retriving the query Based on the Logon customer and spoof customer.
this functionality I have developped in Pageprocessor component.
The same functinality I am utilizing another java Class that Extends AbstractPortalcomponent and utilizing the same Bean.
But the problem both java classes for I used one Jsp only Dynmic spoof customer will come from the JSP Input filed.
In the new Java Class How can I capture the Event When I click the Buttong the InputField value capturing into the AbstractPortalcomponent Class.
I tried like this but It comes as Null Value.
Event event = myContext.getCurrentEvent();
if(event!=null)
InputField ip= (InputField) myContext.getComponentForId("spoofCust");
String spoofCust=ip.getValue().toString();
Please suggest me in this.
What is wrong with this.
Thanks,
Lohi.
Message was edited by:
Lohitha MLohitha,
Try replacing your two lines of code:
InputField ip= (InputField) myContext.getComponentForId("spoofCust");
String spoofCust=ip.getValue().toString();
with:
InputField ip = (InputField) getComponentByName("spoofCust");
String spoofCust = ip.getValueAsDataType().toString();
Let me know how that works for you.
-John -
Can not filter the data with the extended class
Hi,
I have a quick question about PortableObject format. I have created a class which extends PortableObject interface and implemented serializer methods as well. I have updated it in the pof-config.xml file as well. If I insert the objects of this type of object in the cache, they get inserted properly and I can filter the values based on the getters defined in the class. Everything works fine here.
Now, I am trying to extend the existing class that I have. We have our custom API which we have built for our domain objects. I need to store these objects in the cache. So, naturally I need to implement PortableObject interface to do that. So, instead of creating a new class with new set of getters and setters and local fields, I am extending our domain class to create a new class which implements PortableObject interface. Instead of defining the local fields and getters and setters i am reusing the ones provided by my existing class. Now, I can insert the objects of the new class to the cache. But I can not filter the values for the objects of this new class.
Let me show you what exactly I am trying to achieve by giving a small example:
Domain Class:
class Person
private String person_name;
*public String getPerson_name() {return person_name;}*
*public String setPerson_name(person_name) {this.person_name = person_name;}*
The new class implementing PortableObject interface:
class ExtPerson extends Person implements PortableObject
public static final PERSON_NAME = 0;
*public void readExternal(PofReader reader) throws IOException{*
setPerson_name(reader.readString(PERSON_NAME));
*public void writeExternal(PofWriter writer) throws IOException{*
writer.writeString(PERSON_NAME, getPerson_name());
*// And HashCode, Equals and ToString methods, all implemented using the getter from the Person class*
So, if I create a new class ExtPerson without extending the Person class and write all the methods, store the objects in the cache and perform the following query, I get the size printed
System.out.println((cache.entrySet(new EqualsFilter("getPerson_name","ABC"))).size());
But if I use the extended class and insert the values into the cache and if I use the same query to filter, I get 0 printed on the console.
System.out.println((cache.entrySet(new EqualsFilter("getPerson_name","ABC"))).size());
So, can anyone tell what exactly is causing this?
Thanks!Well, just a quick question. It seems that I can not get ContainsAnyFilter or ContainsAllFilter working.
EqualsFilter is actually working properly.
I am preparing a Set of Strings and passing it to ContainsAnyFilter or ContainsAllFilter and it is returning me 0 records.
E.g.:
Set<String> setStr = new HashSet<String>();
setStr.add("ABC");
setStr.add("DEF");
System.out.println((cache2.entrySet(new ContainsAnyFilter("getPerson_name", setStr))).size());
I get 0 in my output
If I try this:
System.out.println((cache.entrySet(new EqualsFilter("getPerson_name","ABC"))).size());
System.out.println((cache.entrySet(new EqualsFilter("getPerson_name","DEF"))).size());
I get 1 for each of the query.
If I club all these EqualsFilter in a Filter[] array and create an AnyFilter or AllFilter and pass it to the query, it works fine.
List<Object> lst = new ArrayList<Object>();
lst.add("ABC");
lst.add("DEF");
Filter[] filter = new Filter[lst.size()];
for(int i=0;i<lst.size();i++)
filter[i] = new EqualsFilter("getPerson_name",lst.get(i).toString());
AnyFilter fil = new AnyFilter(filter);
System.out.println((cache4.entrySet(fil)).size());
I get the desired result here, which is 2.
Am I missing something here? -
Re: [SunONE-JATO] How to Access methods in the MainAppServletBase class from a view bean
OK, fair enough.
Look at the ServletConfig class.
c
Purvashada wrote:
>
We had that option. We decided against the
property files as we can get this dynamically.
There has been problems when this property
was set incorrectly at the time of installation.
Are there any api's to get the servername and
port number other than through request object..
--- "Craig V. Conover" <craig.conover@s...> wrote:
So I guess my question is, why do you need a user
request to get this
information?
You should be able to get this info when the
application is started up,
from a props file.
Does this info change from day to day? If not, why
not create a props
file on the machine that the app is running that has
this info?
Then in the servlet's init method, read this prop
file.
Does that work for you? Not sure how a user request
is needed to
determine this? If it is, please explain.
I have used this same technique for database
properties (servername,
instance name, uid, pwd, etc).
On the QA machine was the properties that pointed to
the QA database,
and on the Production machine, the property file
with the same name had
props that pointed to the Production database.
craig
Purvashada wrote:
It is a static data that is same for all theusers.
It is application level data but generateddynamically
to get the server name and the port number the appis
running on..
Thanks
--- "Craig V. Conover" <craig.conover@s...>wrote:
OK, so how does doing this only once help you.
Wouldn't you need to do
this for each individual end user?
I'm not suggesting that this is request scoped,but
maybe session scoped.
If so, then do this in the module servlet's
onNewSession event.
If this is per user, then storing it staticallyis
problematic because
all users will be using the same data which Idon't
think you want.
Let me know if my assumptions are correct.
craig
Purvashada wrote:
Basically, I need to pass the host url/request
url
to
another server which then posts the results
back to this server.
I need to get the host url dynamically.
This is what I am doing in my code to
get the host url..
URL =req.getScheme() + "://" +
req.getServerName()
+
":" + req.getServerPort();
Thanks
--- "Craig V. Conover" <craig.conover@s...>wrote:
Correct, that is a per request event.
Sounds like we need to figure out a newapproach.
Please elaborate on your requirements for
doing
whatever it is you require.
Maybe we can suggest an alternative, orperhaps
reveal that it may not
be necessary after all.
craig
Purvashada wrote:
I had added this code in the
initializeRequestContext(..)
Hoping it would be called once.
It looks like it is called for every
request.
HttpServletRequest req =requestContext.getRequest();
setActionURL(req);
If I add the code in the init() method
how can I get the HttpServletRequest
getRequest()
Thanks
--- "Craig V. Conover"
<craig.conover@s...>
wrote:
cool.
Be careful about how you update this URL
when
you
use setURL method.
The servlets in JATO are the only shared
(Application scope rather than
Request scope like ViewBeans and
Models),
and
that
you could potentially
have sync/multithread issues. You said
you
were
only
updating once at
the start of the App, so you should be
fine.
I
assume you are doing this
from an init method or init event in theservlet
class? If so, no worries.
Also, just to be sure everyone follows,
I am
not
suggesting that you
write syncronize code in the servlets asthis
will
be a potential bottle
neck in your app's scalibility. This is
not
a
JATO
shortcoming as there
are alternatives to do this sort of
coding.
craig
Purvashada wrote:
I made the method static and is
accessible..
--- "Craig V. Conover"<craig.conover@s...>
wrote:
I would assume it is a static
method, so
just
do:
MainAppServletBase.getURL()
right?
If not static, it probably should
be. If
you
feel it
should not be
static, let us know why/what your
requirements
are.
>
=== message truncated ===
To download the latest version of S1AF (JATO), please visit one of the
following locations:
Framework + IDE plugin for Sun ONE Studio 4 Update 1, Community Edition:
http://wwws.sun.com/software/download/products/Appl_Frmwk_2.0_CE.html
Framework + IDE pluign for Sun ONE Studio 4 Update 1, Enterprise Edition:
http://wwws.sun.com/software/download/products/Appl_Frmwk_2.0_EE.html
Previous versions of JATO:
http://www.sun.com/software/download/developer/5102.htmlOK, fair enough.
Look at the ServletConfig class.
c
Purvashada wrote:
>
We had that option. We decided against the
property files as we can get this dynamically.
There has been problems when this property
was set incorrectly at the time of installation.
Are there any api's to get the servername and
port number other than through request object..
--- "Craig V. Conover" <craig.conover@s...> wrote:
So I guess my question is, why do you need a user
request to get this
information?
You should be able to get this info when the
application is started up,
from a props file.
Does this info change from day to day? If not, why
not create a props
file on the machine that the app is running that has
this info?
Then in the servlet's init method, read this prop
file.
Does that work for you? Not sure how a user request
is needed to
determine this? If it is, please explain.
I have used this same technique for database
properties (servername,
instance name, uid, pwd, etc).
On the QA machine was the properties that pointed to
the QA database,
and on the Production machine, the property file
with the same name had
props that pointed to the Production database.
craig
Purvashada wrote:
It is a static data that is same for all theusers.
It is application level data but generateddynamically
to get the server name and the port number the appis
running on..
Thanks
--- "Craig V. Conover" <craig.conover@s...>wrote:
OK, so how does doing this only once help you.
Wouldn't you need to do
this for each individual end user?
I'm not suggesting that this is request scoped,but
maybe session scoped.
If so, then do this in the module servlet's
onNewSession event.
If this is per user, then storing it staticallyis
problematic because
all users will be using the same data which Idon't
think you want.
Let me know if my assumptions are correct.
craig
Purvashada wrote:
Basically, I need to pass the host url/request
url
to
another server which then posts the results
back to this server.
I need to get the host url dynamically.
This is what I am doing in my code to
get the host url..
URL =req.getScheme() + "://" +
req.getServerName()
+
":" + req.getServerPort();
Thanks
--- "Craig V. Conover" <craig.conover@s...>wrote:
Correct, that is a per request event.
Sounds like we need to figure out a newapproach.
Please elaborate on your requirements for
doing
whatever it is you require.
Maybe we can suggest an alternative, orperhaps
reveal that it may not
be necessary after all.
craig
Purvashada wrote:
I had added this code in the
initializeRequestContext(..)
Hoping it would be called once.
It looks like it is called for every
request.
HttpServletRequest req =requestContext.getRequest();
setActionURL(req);
If I add the code in the init() method
how can I get the HttpServletRequest
getRequest()
Thanks
--- "Craig V. Conover"
<craig.conover@s...>
wrote:
cool.
Be careful about how you update this URL
when
you
use setURL method.
The servlets in JATO are the only shared
(Application scope rather than
Request scope like ViewBeans and
Models),
and
that
you could potentially
have sync/multithread issues. You said
you
were
only
updating once at
the start of the App, so you should be
fine.
I
assume you are doing this
from an init method or init event in theservlet
class? If so, no worries.
Also, just to be sure everyone follows,
I am
not
suggesting that you
write syncronize code in the servlets asthis
will
be a potential bottle
neck in your app's scalibility. This is
not
a
JATO
shortcoming as there
are alternatives to do this sort of
coding.
craig
Purvashada wrote:
I made the method static and is
accessible..
--- "Craig V. Conover"<craig.conover@s...>
wrote:
I would assume it is a static
method, so
just
do:
MainAppServletBase.getURL()
right?
If not static, it probably should
be. If
you
feel it
should not be
static, let us know why/what your
requirements
are.
>
=== message truncated ===
To download the latest version of S1AF (JATO), please visit one of the
following locations:
Framework + IDE plugin for Sun ONE Studio 4 Update 1, Community Edition:
http://wwws.sun.com/software/download/products/Appl_Frmwk_2.0_CE.html
Framework + IDE pluign for Sun ONE Studio 4 Update 1, Enterprise Edition:
http://wwws.sun.com/software/download/products/Appl_Frmwk_2.0_EE.html
Previous versions of JATO:
http://www.sun.com/software/download/developer/5102.html -
How do you use the JSObject class?
Hello everyone,
So, I am trying to make a java applet call a java script function and I am having some problems.... I began by looking at the JSObject class.... Does the JSObject class come standard with an installation of java? or do I have to find it separately? Also, does it make a difference as to what operating system I'm compiling my applet one? I have been developing in mac, and I cant get my applet to compile, it claims that the netscape.javascript package can't be found..... Any suggestions on this? I'm kinda new to Java web development, as I have only been doing it for a month or so, so please keep any answers simple. Also, any other suggestions by which an applet can call a javascript function are greatly appreciated. Thanks beforehand.>
So, I am trying to make a java applet call a java script function and I am having some problems.... I began by looking at the JSObject class.... Does the JSObject class come standard with an installation of java? or do I have to find it separately? >It is included in the JRE, but 'well hidden'.
>
Also, does it make a difference as to what operating system I'm compiling my applet one? >Quite possibly. The Win version puts the main classes into rt.jar, but the netscape classes are in plugin.jar. These are both in the general path ${java.home}/lib/.
>
..I have been developing in mac, and I cant get my applet to compile, it claims that the netscape.javascript package can't be found..... Any suggestions on this? >Add the classes (once you locate them), onto the compile time classpath. I could give you links to documentation on how to do that for either *nix or Windows, but I am not sure how Mac does it. -
Tracking Memory usage on iOS using the Stats class
I've been checking memory usage on an app I'm developing for iOS using the Stats class https://github.com/mrdoob/Hi-ReS-Stats ( http://help.adobe.com/en_US/as3/mobile/WS4bebcd66a74275c3-315cd077124319488fd-7fff.html#WS 948100b6829bd5a61637f0a412623fd0543-8000).
I added the Stats class to my project and redeployed and, yikes, memory usage reported in Stats creeps up (pretty slowly) even when there's nothing happening in the app (just showing a loaded bitmap).
To try and track down the issue I created a project with a test class that extends Sprite with just this single call in the constructor :-
addChild( new Stats() );
I deployed it to the device to check that it didn't gobble any memory.
But I was Suprised to watch the memory usage creep up and up (to approx 5) before some garbage collection kicked in and takes memory back down. I left it running and then it crept up again to over 7.5 this time before being kicked back down to just below 3.
So 2 related questions that I'd appreciate any feedback/observations/thoughts on :-
1 - Is this normal (i.e. memory creeping up when there's nothing other than Stats in the project) ?
2 - What is the best way to monitor memory usage within an app ? Is Stats good enough - is Stats itself causing the memory usage ?
All the best guys !Also see thread (http://forums.adobe.com/message/4280020#4280020)
My conclusions are :-
- If you run an app and leave it idle, memory usage gradually creeps up (presumably as memory is being used to perform calcs/refresh the display etc)
- Periodically the garbage collection kicks in and memory is brought back down
- This cycle could be in excess of 5 mins
Run with your real app and memory will increase and be released much more rapidly/regularly.
- It's probably worth performing initial checks by running on your desktop to iron out any initial problems -
How to use the Rectangle class to draw an image and center it in a JPanel
I sent an earlier post on how to center an image in a JPanel using the Rectangle class. I was asked to send an executable code which will show the malfunction. The code below is an executable code and a small part of a very big project. To simplifiy things, it is just a JFrame and a JPanel with an open dialog. Once executed the JFrame and the FileDialog will open. You can then navigate to a .gif or a .jpg picture and open it. What I want is for the picture to be centered in the middle of the JPanel and not the upper left corner. It is also important to stress that, I am usinig the Rectangle class to draw the Image. The region of interest is where the rectangle is created. In the constructor of the CenterRect class, I initialize the Rectangle class. Then I use paintComponent in the CenterRect class to draw the Image. The other classes are just support classes. The MyImage class is an extended image class which also has a draw() method. Any assistance in getting the Rectangle to show at the center of the JPanel without affecting the size and shape of the image will be greatly appreciated.
I have divided the code into three parts. They are all supposed to be on one file in order to execute.
import java.awt.*;
import java.awt.image.*;
import javax.swing.*;
public class CenterRect extends JPanel {
public static Rectangle srcRect;
Insets insets = null;
Image image;
MyImage imp;
private double magnification;
private int dstWidth, dstHeight;
public CenterRect(MyImage imp){
insets = getInsets();
this.imp = imp;
int width = imp.getWidth();
int height = imp.getHeight();
ImagePanel.init();
srcRect = new Rectangle(0,0, width, height);
srcRect.setLocation(0,0);
setDrawingSize(width, height);
magnification = 1.0;
public void setDrawingSize(int width, int height) {
dstWidth = width;
dstHeight = height;
setSize(dstWidth, dstHeight);
public void paintComponent(Graphics g) {
Image img = imp.getImage();
try {
if (img!=null)
g.drawImage(img,0,0, (int)(srcRect.width*magnification), (int)(srcRect.height*magnification),
srcRect.x, srcRect.y, srcRect.x+srcRect.width, srcRect.y+srcRect.height, null);
catch(OutOfMemoryError e) {e.printStackTrace();}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Opener().openImage();
class Opener{
private String dir;
private String name;
private static String defaultDirectory;
JFrame parent;
public Opener() {
initComponents();
public void initComponents(){
parent = new JFrame();
parent.setContentPane(ImagePanel.panel);
parent.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
parent.setExtendedState(JFrame.MAXIMIZED_BOTH);
parent.setVisible(true);
public void openDialog(String title, String path){
if (path==null || path.equals("")) {
FileDialog fd = new FileDialog(parent, title);
defaultDirectory = "dir.image";
if (defaultDirectory!=null)
fd.setDirectory(defaultDirectory);
fd.setVisible(true);
name = fd.getFile();
if (name!=null) {
dir = fd.getDirectory();
defaultDirectory = dir;
fd.dispose();
if (parent==null)
return;
} else {
int i = path.lastIndexOf('/');
if (i==-1)
i = path.lastIndexOf('\\');
if (i>0) {
dir = path.substring(0, i+1);
name = path.substring(i+1);
} else {
dir = "";
name = path;
public MyImage openImage(String directory, String name) {
MyImage imp = openJpegOrGif(dir, name);
return imp;
public void openImage() {
openDialog("Open...", "");
String directory = dir;
String name = this.name;
if (name==null)
return;
MyImage imp = openImage(directory, name);
if (imp!=null) imp.show();
MyImage openJpegOrGif(String dir, String name) {
MyImage imp = null;
Image img = Toolkit.getDefaultToolkit().getImage(dir+name);
if (img!=null) {
imp = new MyImage(name, img);
FileInfo fi = new FileInfo();
fi.fileFormat = fi.GIF_OR_JPG;
fi.fileName = name;
fi.directory = dir;
imp.setFileInfo(fi);
return imp;
}This is the second part. It is a continuation of the first part. They are all supposed to be on one file.
class MyImage implements ImageObserver{
private int imageUpdateY, imageUpdateW,width,height;
private boolean imageLoaded;
private static int currentID = -1;
private int ID;
private static Component comp;
protected ImageProcessor ip;
private String title;
protected Image img;
private static int xbase = -1;
private static int ybase,xloc,yloc;
private static int count = 0;
private static final int XINC = 8;
private static final int YINC = 12;
private int originalScale = 1;
private FileInfo fileInfo;
ImagePanel win;
/** Constructs an ImagePlus from an AWT Image. The first argument
* will be used as the title of the window that displays the image. */
public MyImage(String title, Image img) {
this.title = title;
ID = --currentID;
if (img!=null)
setImage(img);
public boolean imageUpdate(Image img, int flags, int x, int y, int w, int h) {
imageUpdateY = y;
imageUpdateW = w;
imageLoaded = (flags & (ALLBITS|FRAMEBITS|ABORT)) != 0;
return !imageLoaded;
public int getWidth() {
return width;
public int getHeight() {
return height;
/** Replaces the ImageProcessor, if any, with the one specified.
* Set 'title' to null to leave the image title unchanged. */
public void setProcessor(String title, ImageProcessor ip) {
if (title!=null) this.title = title;
this.ip = ip;
img = ip.createImage();
boolean newSize = width!=ip.getWidth() || height!=ip.getHeight();
width = ip.getWidth();
height = ip.getHeight();
if (win!=null && newSize) {
win = new ImagePanel(this);
public void draw(){
CenterRect ic = null;
win = new ImagePanel(this);
if (win!=null){
win.addIC(this);
win.getCanvas().repaint();
ic = win .getCanvas();
win.panel.add(ic);
int width = win.imp.getWidth();
int height = win.imp.getHeight();
Point ijLoc = new Point(10,32);
if (xbase==-1) {
xbase = 5;
ybase = ijLoc.y;
xloc = xbase;
yloc = ybase;
if ((xloc+width)>ijLoc.x && yloc<(ybase+20))
yloc = ybase+20;
int x = xloc;
int y = yloc;
xloc += XINC;
yloc += YINC;
Dimension screen = Toolkit.getDefaultToolkit().getScreenSize();
count++;
if (count%6==0) {
xloc = xbase;
yloc = ybase;
int scale = 1;
while (xbase+XINC*4+width/scale>screen.width || ybase+YINC*4+height/scale>screen.height)
if (scale>1) {
originalScale = scale;
ic.setDrawingSize(width/scale, height/scale);
/** Returns the current AWT image. */
public Image getImage() {
if (img==null && ip!=null)
img = ip.createImage();
return img;
/** Replaces the AWT image, if any, with the one specified. */
public void setImage(Image img) {
waitForImage(img);
this.img = img;
JPanel panel = ImagePanel.panel;
width = img.getWidth(panel);
height = img.getHeight(panel);
ip = null;
/** Opens a window to display this image and clears the status bar. */
public void show() {
show("");
/** Opens a window to display this image and displays
* 'statusMessage' in the status bar. */
public void show(String statusMessage) {
if (img==null && ip!=null){
img = ip.createImage();
if ((img!=null) && (width>=0) && (height>=0)) {
win = new ImagePanel(this);
draw();
private void waitForImage(Image img) {
if (comp==null) {
comp = ImagePanel.panel;
if (comp==null)
comp = new JPanel();
imageLoaded = false;
if (!comp.prepareImage(img, this)) {
double progress;
while (!imageLoaded) {
if (imageUpdateW>1) {
progress = (double)imageUpdateY/imageUpdateW;
if (!(progress<1.0)) {
progress = 1.0 - (progress-1.0);
if (progress<0.0) progress = 0.9;
public void setFileInfo(FileInfo fi) {
fi.pixels = null;
fileInfo = fi;
} -
How to get maximal value from the data/class for show in Map legend
I make WAD report that using Map Web Item.
I devide to four (4) classes for legend (Generate_Breaks).
I want to change default value for the class by javascript and for this,
I need to get maximal value from the class.
How to get maximal value from the data/class.
please give me solution for my problem.
Many Thx
Eddy Utomouse this to get the following End_date
<?following-sibling::../END_DATE?>
Try this
<?for-each:/ROOT/ROW?>
==================
Current StartDate <?START_DATE?>
Current End Date <?END_DATE?>
Next Start Date <?following-sibling::ROW/END_DATE?>
Previous End Date <?preceding-sibling::ROW[1]/END_DATE?>
================
<?end for-each?>
o/p
==================
Current StartDate 01-01-1980
Current End Date 01-01-1988
Next Start Date 01-01-1990
Previous End Date
================
==================
Current StartDate 01-01-1988
Current End Date 01-01-1990
Next Start Date 01-01-2005
Previous End Date 01-01-1988
================
==================
Current StartDate 01-01-2000
Current End Date 01-01-2005
Next Start Date
Previous End Date 01 -
Warning :: Derived class hides the base class virtual function
We are porting from CC5.3 to CC5.8 compiler with Sun Studio one compiler. After plenty of hurdles we are in the final stage of removing the warning messages... Amoung the plenty the following one is very common and in different files. Why am I getting this error in 5.8 and not in 5.3 compiler....
Warning: derived_Object::markRead Hides the virtual function base_Object::markRead(ut_SourceCodeLocation&) const in a virtual base
From this it is easily understandable that the base class mark read was hidden by derived class markRead... when we drive and override the derived class function.... It is all over the place....
Thank you,
Saravanan Kannan
//public: using xx_Object :: markRead;
virtual void markRead() const;The Sun C++ FAQ discusses the warning message:
http://developers.sun.com/prodtech/cc/documentation/ss11/mr/READMEs/c++_faq.html#Coding1
Notice that warnings are not necessarily errors. But I applaud your desire to fix the code so that it generates no warnings. I wish more of our customers could be persuaded to do the same. :-)
C++ 5.3 issues this warning, by the way. Example:
struct B { virtual int foo(int); };
struct D : B { virtual int foo(double); }; // line 2
D d;
line 2: Warning: D::foo hides the virtual function B::foo(int).
If for your particular code you do not see a warning with C++ 5.3, it would be due to a bug in C++ 5.3 that was later fixed. -
I am getting a NullPointerException when trying to use the Service class
I am getting a NullPointerException which is as follows
java.lang.NullPointerException
file:/K:/Learner/JavaFx2/ProductApplication/dist/run166129449/ProductApplication.jar!/com/product/app/view/viewsingle.fxml
at com.product.app.controller.ViewSingleController.initialize(ViewSingleController.java:70)
at javafx.fxml.FXMLLoader.load(Unknown Source)
at javafx.fxml.FXMLLoader.load(Unknown Source)
And my View SingleController is as follows
package com.product.app.controller;
import com.product.app.model.Product;
import com.product.app.service.ViewProductsService;
import com.product.app.util.JSONParser;
import com.product.app.util.TagConstants;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.ResourceBundle;
import javafx.collections.ObservableList;
import javafx.concurrent.Service;
import javafx.concurrent.Task;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.ProgressIndicator;
import javafx.scene.control.TextArea;
import javafx.scene.control.TextField;
import javafx.scene.layout.Region;
import javafx.stage.Stage;
import javax.swing.JOptionPane;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONObject;
* FXML Controller class
* @author Arun Joseph
public class ViewSingleController implements Initializable {
private static String action = "";
@FXML
private TextField txtID;
@FXML
private TextField txtName;
@FXML
private TextField txtPrice;
@FXML
private TextArea txtDesc;
@FXML
private Region veil;
@FXML
private ProgressIndicator p;
private ViewProductsService service = new ViewProductsService();
private JSONObject product = null;
private JSONParser parser = new JSONParser();
private int pid = 1;
public void setPid(int pid) {
this.pid = pid;
* Initializes the controller class.
@Override
public void initialize(URL url, ResourceBundle rb) {
veil.setStyle("-fx-background-color: rgba(0, 0, 0, 0.4)");
p.setMaxSize(150, 150);
p.progressProperty().bind(service.progressProperty());
veil.visibleProperty().bind(service.runningProperty());
p.visibleProperty().bind(service.runningProperty());
Product product = new Product();
service.start();
ObservableList<Product> products = service.valueProperty().get();
products.get(pid);
txtID.textProperty().set(String.valueOf(products.get(pid).getPid()));
//product = service.valueProperty().get().get(pid);
//txtID.setText(String.valueOf(product.getPid()));
txtName.textProperty().set(product.getName());
txtPrice.textProperty().set(String.valueOf(product.getPrize()));
txtDesc.textProperty().set(product.getDescription());
private SomeService someService = new SomeService();
@FXML
private void handleUpdateButtonClick(ActionEvent event) {
action = "update";
someService.start();
p.progressProperty().bind(service.progressProperty());
veil.visibleProperty().bind(service.runningProperty());
p.visibleProperty().bind(service.runningProperty());
@FXML
private void handleDeleteButtonClick(ActionEvent event) {
action = "delete";
someService.start();
p.progressProperty().bind(service.progressProperty());
veil.visibleProperty().bind(service.runningProperty());
p.visibleProperty().bind(service.runningProperty());
@FXML
private void handleCancelButtonClick(ActionEvent event) {
closeStage();
private void closeStage() {
ViewSingleController.stage.close();
private static Stage stage = null;
public static void setStage(Stage stage) {
ViewSingleController.stage = stage;
private class SomeService extends Service<String> {
@Override
protected Task<String> createTask() {
return new SomeTask();
private class SomeTask extends Task<String> {
@Override
protected String call() throws Exception {
String result = "";
int success = 0;
List<NameValuePair> params = new ArrayList<NameValuePair>();
switch (action) {
case "update":
params.add(new BasicNameValuePair("pid", txtID.getText()));
params.add(new BasicNameValuePair("name", txtName.getText()));
params.add(new BasicNameValuePair("price", txtPrice.getText()));
params.add(new BasicNameValuePair("description", txtDesc.getText()));
product = parser.makeHttpRequest(TagConstants.url_update_product_with_id, "POST", params);
success = product.getInt(TagConstants.TAG_SUCCESS);
if (success == 1) {
result = "Successfully Updated the product";
JOptionPane.showMessageDialog(null, result);
closeStage();
break;
case "delete":
params.add(new BasicNameValuePair("pid", txtID.getText()));
product = parser.makeHttpRequest(TagConstants.url_delete_product_with_id, "POST", params);
success = product.getInt(TagConstants.TAG_SUCCESS);
if (success == 1) {
result = "Successfully Deleted the product";
JOptionPane.showMessageDialog(null, result);
closeStage();
break;
return result;Time Machine has its own mechanism for deleting files. The number you are seeing may represent a "underflow" or a number of files which exceeds the limit and becomes negative.
The best way to remove TM files is via the TM interface: select the files and click the Gear and select delete from all backups.
If you are deleting files on an external drive which once included TM files, it is best to use the terminal and just delete them directly. They go bye-bye without ever seeing the trash bucket.
Of course, using the terminal is not for everyone.
What you might be able to do is restore the files from trash and then delete them properly or in smaller bundles.
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