FlexiDate.class extends Date.class

Hi, I am pleading for help with the following.
I am trying to compile the FlexiDate class which extends from oracle.jbo.domian.Date class. The oracle.jbo.domian.Date class must contain the inner class Date$1$facClass because when I compile the FlexiDate class I receive the message "Error Type: oracle/jbo/domain/Date$facClass was not found. Both the Date and Date$facClass classes are in the same jre file which is in the classpath. What's wierd is that this error doesn't occur when I compile using Oracle Jdeveloper(Win NT) but does occur in the unix environment. Both environments are using the same JDK1.3.1 and the same libraries and classpath. Any help is much appreciated. Thanks.
null

Can you double-check that you have the jbodomorcl.zip archive correctly specified as part of your CLASSPATH in your compiletime environment? The class it's complaining about is in this archive.

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Abstract class extends other class?

What happens when a abstract class extends other class?
How can we use the abstract class late in other class?
Why do we need an abstract class that extends other class?
for example:-
public abstract class ABC extends EFG {
public class EFG{
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shafiur wrote:
What happens when a abstract class extends other class?Nothing special. You have defined an abstract class.
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Package.Class extends Package.Class ??

Is there any way I can make a class in a package extend another class in the same package://---- File: JrcCode1.java
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The current directory is not automatically in the classpath.
You have to set it up that way. That may be your problemI have tried doing this, and it's still the same! The first code compiles but the second code fails:
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Weblogic User class extends deprecated class?

weblogic.security.acl.User extends java.security.Identity which is a
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s> weblogic.security.acl.User extends java.security.Identity which is
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Error 1119 when class extends another class that extends movieclip

hiya
i came across this problem and i have no clue why it's happening. basically, consider 2 nested movieclips on the stage, something like stage -> main -> filler. both movieclips have instance names (main and filler).
in the library, i set main to export for actionscript, using class A:
package {
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package {
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afaik, if you dont declare super(), flash will make a call for you (but best practice is to call it always).
but i found the "solution" in another forum.
it seems that flash implicitly generates variables if you have instance names/symbols on the stage. there is an option to disable that under publish settings -> Actionscript version -> Settings -> automatically declare stage instances. by disabling that, we were able to declare public var filler:MovieClip; on class A, and that worked.
although, that solution doesnt look attractive to me. the other solution posted on another forum was to make calls to this ["filler"] instead of this.filler. that seems to work fine. i guess it has to do with the automatic variable generated thing.. who knows?
i hope that helps someone else too

Data class and storage class

Hi ,
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Hi Tapashi,
Something i found about dataclass in DSO/Cube, which might be useful to you.
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Extending a class (newbie)

I'm very new to Java. I'm making use of custom web classes from a proprietary application.
I want to write my own class by extending another class. My class need to do exactly what the super class does. The super class extends another class.
Here is how it looks,
MY CLASS:
public RmCopyCommand extends DwCopyCommand
THE SUPER CLASS:
public DwCopyCommand extends DwDocbaseCommand
The super class, DwCopyCommand, has four methods defined (plus many inherited). To make my class, RmCopyCommand, mimic the super class, I did the following:
1. I made a constructor
RmCopyCommand()
super();
2. I duplicated the methods
public boolean hasTransaction()
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I did the above to all four methods defined in the super class. I also used TRY...CATCH blocks where necessary. The source compiled.
Off course, this doesn't work. I got a nullPointerException error. What I want to do is use the exact functionality of DwCommand, but write another method that makes a call to an inherited method.
Could anyone tell me what I might be doing wrong?
I hope I included enough details. If you need further details, let me know.
Thanks,
Moshe

Lets go through this point by point:
I'm very new to Java. I'm making use of custom web
classes from a proprietary application.
I want to write my own class by extending another
class. My class need to do exactly what the super
class does. The super class extends another class.Does you class really need to do exactly what the super class does? If the super class has everything you need why are you subclassing it.
Here is how it looks,
MY CLASS:
public RmCopyCommand extends DwCopyCommandThe above statement is all you need followed by {} according to your description.
THE SUPER CLASS:
public DwCopyCommand extends DwDocbaseCommand
The super class, DwCopyCommand, has four methods
defined (plus many inherited). To make my class,
RmCopyCommand, mimic the super class, I did the
following:
1. I made a constructor
RmCopyCommand()
super();
}You only need to do this for constructors with arguments. If you don't create a default constructor, one is created for you. Also if you don't call super() in your constructor it will automatically before anything else is executed.
2. I duplicated the methods
public boolean hasTransaction()
return super.hasTransaction();
}This is unneccesary. By subclassing a class all its public and protected members are part of the sub class.
I did the above to all four methods defined in the
super class. I also used TRY...CATCH blocks where
necessary. The source compiled.
Off course, this doesn't work. I got a
nullPointerException error. What I want to do is use
the exact functionality of DwCommand, but write
another method that makes a call to an inherited
method.Nothing that you have stated here would cause that.
Could anyone tell me what I might be doing wrong?
I hope I included enough details. If you need further
details, let me know.
Thanks,
Moshe

Can a Class extend a Main Class

Can a Class extend a Class containing
"public static void main(String[] args)"

What sort of methods a class has doesn't determine
whether it may be extended or not. If the class is
marked Final determines whether it may be subclassed
or not.
And if it is accesible in the context that it is being used in.

Extend a j2se class in j2me class

I am using eclipseme to build my project, and i have imported the j2se library jar file
however, when i try to extend a a j2se class in j2me class
For example,
public class < j2me class >extends <j2se class>{
There is a error message occur, it is:
Error preverifying class < j2me class >
what is the problem on it?
Thanks

stickbaby wrote:
I am using eclipseme to build my project, and i have imported the j2se library jar file
however, when i try to extend a a j2se class in j2me class
For example,
public class < j2me class >extends <j2se class>{
There is a error message occur, it is:
Error preverifying class < j2me class >
what is the problem on it?
what class?
Thanks

Reflection with something like class MyClass T extends Date {...}

assume you have:
//first class
class Message {
//second class
class ConcreteMessage extends Message{
//third class
public class WrapperBase<J extends Message> {
    private J message = null;
    public J getMessage() {
        return message;
    public void setMessage(J message) {
        this.message = message;
    public WrapperBase(J message){
        this.message = message;
//fourth class
class WrapperExtended extends WrapperBase<ConcreteMessage>{
    public WrapperExtended(ConcreteMessage message) {
        super(message);
}Reflecting on the WrapperExtended I obtain the getter(for example)
WrapperExtended ext = new WrapperExtended(message);
Method extMethod =ext.getClass().getMethod("getMessage", new Class[0]);If I check the class of the extMetihd return type I obtain a Message, not a ConcreteMessage as I expected. How can I retrieve the info that the method returns a ConcreteMessage?
Development environment knows that the return type is a ConcreteMessage,so I guess there must me some reflection mechanism to retrieve it.

If I check the class of the extMetihd return type I obtain a Message, not a ConcreteMessage as I expected. How can I retrieve the info that the method returns a ConcreteMessage?
Development environment knows that the return type is a ConcreteMessage,so I guess there must me some reflection mechanism to retrieve it.
Yes, for classs derived from a concrete generic instantiation (such as WrapperBase<String>) you can find the concrete return type via reflection. Here's the code that does the trick:
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;
class Message {
//second class
class ConcreteMessage extends Message{
//third class
class WrapperBase<J extends Message> {
    private J message = null;
    public J getMessage() {
        return message;
    public void setMessage(J message) {
        this.message = message;
    public WrapperBase(J message){
        this.message = message;
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         Method extMethod = cl.getMethod(methodName, params);
         if(!(extMethod.getGenericReturnType() instanceof TypeVariable))
              return extMethod.getReturnType();
         TypeVariable<?> genericReturnType = (TypeVariable<?>)extMethod.getGenericReturnType();
         String variableName = genericReturnType.getName();
         ParameterizedType genericSuperclass = (ParameterizedType) cl.getGenericSuperclass();
         TypeVariable<Class<WrapperBase>>[] typeParameters = WrapperBase.class.getTypeParameters();
         for(int i = 0; i < typeParameters.length; ++i) {
              if(typeParameters.getName().equals(variableName)) {
               Type type = genericSuperclass.getActualTypeArguments()[i];
               if(!(type instanceof Class))
                    throw new IllegalArgumentException("class "+cl.getName()+" does not resolve type parameter "+ variableName);
               return (Class<?>)type;
     throw new InternalError();
//fourth class
public class WrapperExtended extends WrapperBase<ConcreteMessage>{
     public WrapperExtended(ConcreteMessage message) {
super(message);
public static void main(String[] args) throws SecurityException, NoSuchMethodException {
          System.out.println(WrapperBase.findConcreteReturnType(WrapperExtended.class, "getMessage"));

[svn:bz-trunk] 21285: Need to change _parent, privateCall and instance properties from private to protected in order to extend this class for another project

Revision: 21285
Revision: 21285
Author:   [email protected]
Date:     2011-05-20 07:53:23 -0700 (Fri, 20 May 2011)
Log Message:
Need to change _parent, privateCall and instance properties from private to protected in order to extend this class for another project
Modified Paths:
    blazeds/trunk/apps/ds-console/console/ConsoleManager.as

Revision: 21285
Revision: 21285
Author:   [email protected]
Date:     2011-05-20 07:53:23 -0700 (Fri, 20 May 2011)
Log Message:
Need to change _parent, privateCall and instance properties from private to protected in order to extend this class for another project
Modified Paths:
    blazeds/trunk/apps/ds-console/console/ConsoleManager.as

Create a "Date" class & modify, ouput incorrect - why?

hi,
Would you mind explaining to me what i did wrong with my code...
when i run the main() i get:
..today . : . tomorrow
mm/dd/yyyy : mm/dd/yyyy
12/28/1949 : 00/29/0000
12/29/1949 : 00/29/0000
12/30/1949 : 00/29/0000
12/31/1949 : 00/29/0000
12/32/1949 : 00/29/0000
12/33/1949 : 00/29/0000
Modify the Date class of Fig.8.8 to:
provide a method nextDay to increment the day by one. The Date object should remain in a constant state. Write a driver program that test the nextDate method in a loop.
// Fig. 8.8: Date.java
// Declaration of the Date class.
//package com.deitel.jhtp3.ch08;
import javax.swing.JOptionPane;
public class Date extends Object {
   private int month; // 1-12
   private int day;    // 1-31 based on month
   private int year;   // any year
   private int nextMonth; // 1-12
   private int nextDay;    // 1-31 based on month
   private int nextYear;   // any year
   // Constructor: Confirm proper value for month;
   // call method checkDay to confirm proper
   // value for day.
   public Date( int mn, int dy, int yr )
          month = checkMonth( mn );      // validate the month
      year = checkYear( yr );       // validate the year
      day   = checkDay( dy );        // validate the day
      nextDay = nextDate( month,day,year);
      System.out.println(
         "Date object constructor for date " + toString() );
     //utility method to check month
     private int checkMonth( int testMonth )
          if ( testMonth > 0 && testMonth <= 12 ) // validate the month
         month = testMonth;
      else {
         month = 1;
         System.out.println( "Month " + testMonth +
                            " invalid. Set to month 1." );
      return testMonth; // leave object in consistent state
     //utility method to check year
     private int checkYear( int testYear )
          if ( testYear > 0 && testYear <= 2002 )
         year = testYear;
      else {
         year = 2002;
         System.out.println( "Year " + testYear +
                            " invalid. Set to year 2002." );
      return testYear; // leave object in consistent state
   // Utility method to confirm proper day value
   // based on month and year.
   private int checkDay( int testDay )
      int daysPerMonth[] = { 0, 31, 28, 31, 30,
                             31, 30, 31, 31, 30,
                             31, 30, 31 };
      if ( testDay > 0 && testDay <= daysPerMonth[ month ] )
         return testDay;
      if ( month == 2 &&   // February: Check for leap year
           testDay == 29 &&
           ( year % 400 == 0 ||
             ( year % 4 == 0 && year % 100 != 0 ) ) )
         return testDay;
      System.out.println( "Day " + testDay +
                          " invalid. Set to day 1." );
      return 1; // leave object in consistent state
     private int nextDate( int mon, int da, int yer )
          //add one to day
          //does it start the next month
          //does it start the next year
      int daysEaMonth[] = { 0, 31, 28, 31, 30,
                             31, 30, 31, 31, 30,
                             31, 30, 31 };
          nextDay = da + 1;
               if ( nextDay > daysEaMonth[month]){
                  nextDay = 1;
                  if (mon == 12)
                     nextMonth = 1;
                  else
                     nextMonth = mon + 1;
                  if (nextMonth == 1) nextYear = year + 1;
               }//end of if nextDay
      return nextDay;
   // Create a String of the form month/day/year
   public String toString()
      { return month + "/" + day + "/" + year +
               " : " + nextMonth + "/" + nextDay + "/"
                + nextYear + "\n" ; }
public static void main( String args[] )
   {   String result = "";
          //Date c = new Date();
      Date d = new Date( 12, 28, 1949 );
      //Date e = new Date( 7, 24, 1949 );
      for (int x = 1; x<6; x++ ){
               d.day++;
               result = result + d.toString();
      JOptionPane.showMessageDialog( null,
         //e.toString()+ d.toString(),
         result,
         "Testing Date Class",
         JOptionPane.INFORMATION_MESSAGE );
      System.exit( 0 );
}//end of class Date
*****************************************************************/

ok, will change...
Question regarding
"You're not setting the values of nextMonth or nextYear anywhere."
but i have class variables.....
private int nextMonth; // <dont these values get assigned from the
private int nextDay; // <function "nextDate", i mean, heck i thot
private int nextYear; // <if they were class var's i could assign val
private int nextDate( int mon, int da, int yer )
     nextDay = da + 1;
     if ( nextDay > daysEaMonth[month]){
        nextDay = 1;
        if (mon == 12)
           nextMonth = 1;
        else
           nextMonth = mon + 1;
        if (nextMonth == 1) nextYear = year + 1;

Date class is missing in docs

Hi, could anybody give me documentation to the Oracle.jbo.Domain.Date class ?
Why this is not documented?
why give this class with the same name than java.util.Date ? it really turns coding hard:
oracle.jbo.Domain.Date d1 = getMyDate();
java.util.Date d2 = d1.toDate();
it's really disgusting.
null

There is a bug logged regarding the missing javadoc in JDev 3.1. There was documentation for the Date in JDev 3.0. Apparently we missed it somehow. Below is the javadoc from JDev 3.0. Sorry for the long post, but I hope it helps.
oracle.jbo.domain
Class Date
java.lang.Object
|
+--oracle.sql.Datum
|
+--oracle.sql.DATE
|
+--oracle.jbo.domain.Date
public class Date
extends oracle.sql.DATE
implements DomainInterface, oracle.sql.CustomDatum, java.io.Serializable
An encapsulation of Oracle SQL DATE objects as immutable Domain objects.
Date objects consist of data (a byte array) and a Domain type code. Domain dates extend SQL dates by being convertable to and from JDBC values.
Since:
JDevloper 3.0
See Also:
Serialized Form
Fields inherited from class oracle.sql.DATE
BDA, BDAL, BDT, BHR, BHRL, BMN, BMNL, BMO, BMOL, BSC, BSCL, BYR, BYRL, HRZER0, MIZERO, MSD, SEZERO, YR0
Constructor Summary
Date()
Creates a default Date Domain object.
Date(byte[] value)
Internal: Applications should not invoke this method.
Date(Date value)
Creates a Date identical to an existing Date.
Date(java.sql.Date value)
Creates a Date Domain object from a JDBC Date.
Date(oracle.sql.DATE value)
Creates a Date Domain object from an Oracle SQL DATE.
Date(java.lang.Object value)
Creates a Date Domain object from a JDBC Object.
Date(java.lang.String value)
Creates a Date Domain object from a Java String.
Date(java.sql.Time value)
Creates a Date Domain object from a JDBC Time object.
Date(java.sql.Timestamp value)
Creates a Date Domain object from a JDBC Timestamp object.
Method Summary
oracle.sql.DATE addJulianDays(int julianDay, int julianSec)
oracle.sql.DATE addMonths(int months)
Overrides the Oracle SQL method of the same name to return a Date Domain object.
Number diffInMonths(Date date)
Overrides the Oracle SQL method of the same name to return a Date Domain object.
oracle.sql.NUMBER diffInMonths(oracle.sql.DATE date)
boolean equals(java.lang.Object other)
Tests this for equality with another object.
static oracle.sql.DATE fromJulianDays(int julianDay, int julianSec)
Overrides the Oracle SQL method of the same name to return a Date Domain object.
static oracle.sql.DATE fromText(java.lang.String datestr, java.lang.String fmt, java.lang.String lang)
Overrides the Oracle SQL method of the same name to return a Date Domain object.
static oracle.sql.DATE getCurrentDate()
Overrides the Oracle SQL method of the same name to return a Date Domain object.
static oracle.sql.CustomDatumFactory getCustomDatumFactory()
Internal: Applications should not invoke this method.
java.lang.Object getData()
Converts this to a JDBC Timestamp object.
int hashCode()
Computes a hash code for this.
oracle.sql.DATE lastDayOfMonth()
Overrides the Oracle SQL method of the same name to return a Date Domain object.
static void main(java.lang.String[] argv)
Internal: Applications should not invoke this method.
oracle.sql.DATE round(java.lang.String prec)
Overrides the Oracle SQL method of the same name to return a Date Domain object.
oracle.sql.DATE setDayOfWeek(int day)
Overrides the Oracle SQL method of the same name to return a Date Domain object.
oracle.sql.Datum toDatum(oracle.jdbc.driver.OracleConnection conn)
Internal: Applications should not invoke this method.
oracle.sql.NUMBER toNumber()
java.lang.String toString()
Converts this to a textual representation.
oracle.sql.DATE truncate(java.lang.String prec)
Methods inherited from class oracle.sql.DATE
checkValidity, compareTo, dateValue, diffInJulianDays, isConvertibleTo, makeJdbcArray, numberToJulianDays, stringValue, timestampValue, timeValue, toBytes, toBytes, toBytes, toBytes, toBytes, toDate, toJdbc, toJulianDays, toString, toText, toTime, toTimestamp
Methods inherited from class oracle.sql.Datum
asciiStreamValue, bigDecimalValue, binaryStreamValue, booleanValue, byteValue, characterStreamValue, doubleValue, floatValue, getBytes, getLength, getStream, intValue, longValue, setBytes, setShareBytes, shareBytes
Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait
Constructor Detail
Date
public Date()
Creates a default Date Domain object.
This constructor does not create a null date: use one of the NullValue() constructors.
Date
public Date(byte[] value)
Internal: Applications should not invoke this method.
Creates a Date Domain object from the given byte array.
Parameters:
value - a value returned by a previous call to getBytes() on an SQL object compatable with Date.
Date
public Date(oracle.sql.DATE value)
Creates a Date Domain object from an Oracle SQL DATE.
Parameters:
value - a DATE SQL object.
Date
public Date(Date value)
Creates a Date identical to an existing Date.
Parameters:
value - a Date Domain object.
Date
public Date(java.sql.Date value)
Creates a Date Domain object from a JDBC Date.
Parameters:
value - a DATE SQL object.
Date
public Date(java.sql.Time value)
Creates a Date Domain object from a JDBC Time object.
Parameters:
value - a Time SQL object.
Date
public Date(java.sql.Timestamp value)
Creates a Date Domain object from a JDBC Timestamp object.
Parameters:
value - a Time SQL object.
Date
public Date(java.lang.Object value)
throws java.sql.SQLException
Creates a Date Domain object from a JDBC Object.
Parameters:
value - an Object that is an instance of Date, Time, Timestamp, or String.
Throws:
java.sql.SQLException - if the object is not of one of the recognized classes.
Date
public Date(java.lang.String value)
Creates a Date Domain object from a Java String.
Parameters:
value - a textual representation of a Date.
Method Detail
getCustomDatumFactory
public static oracle.sql.CustomDatumFactory getCustomDatumFactory()
Internal: Applications should not invoke this method.
Initializes the Date Domain.
This method is invoked when JBO is initialized. Applications should not call this method directly.
Returns:
the CustomDatumFactory for the Date Domain.
toDatum
public oracle.sql.Datum toDatum(oracle.jdbc.driver.OracleConnection conn)
throws java.sql.SQLException
Internal: Applications should not invoke this method.
Converts this Date Domain object back into an SQL DATE object.
Specified by:
toDatum in interface oracle.sql.CustomDatum
Parameters:
conn - Not used.
Returns:
A Datum containing DATE object.
Throws:
SQLException - Never.
getData
public java.lang.Object getData()
Converts this to a JDBC Timestamp object.
Specified by:
getData in interface DomainInterface
Tags copied from interface: DomainInterface
Returns:
a formatted value object.
toString
public java.lang.String toString()
Converts this to a textual representation.
Overrides:
toString in class java.lang.Object
equals
public boolean equals(java.lang.Object other)
Tests this for equality with another object. The argument is converted to a Date object, if necessary.
Overrides:
equals in class oracle.sql.Datum
Parameters:
other - an arbitrary Object.
Returns:
true if conversion was successful and the converted argument is identical to this.
hashCode
public int hashCode()
Computes a hash code for this.
Overrides:
hashCode in class java.lang.Object
Returns:
the hash code of this.
addJulianDays
public oracle.sql.DATE addJulianDays(int julianDay,
int julianSec)
Overrides:
addJulianDays in class oracle.sql.DATE
Returns:
a Date Domain object.
addMonths
public oracle.sql.DATE addMonths(int months)
Overrides the Oracle SQL method of the same name to return a Date Domain object.
Overrides:
addMonths in class oracle.sql.DATE
See Also:
"oracle.sql.DATE"
diffInMonths
public Number diffInMonths(Date date)
Overrides the Oracle SQL method of the same name to return a Date Domain object.
See Also:
"oracle.sql.DATE"
diffInMonths
public oracle.sql.NUMBER diffInMonths(oracle.sql.DATE date)
Overrides:
diffInMonths in class oracle.sql.DATE
getCurrentDate
public static oracle.sql.DATE getCurrentDate()
Overrides the Oracle SQL method of the same name to return a Date Domain object.
See Also:
"oracle.sql.DATE"
fromJulianDays
public static oracle.sql.DATE fromJulianDays(int julianDay,
int julianSec)
Overrides the Oracle SQL method of the same name to return a Date Domain object.
See Also:
"oracle.sql.DATE"
fromText
public static oracle.sql.DATE fromText(java.lang.String datestr,
java.lang.String fmt,
java.lang.String lang)
Overrides the Oracle SQL method of the same name to return a Date Domain object.
See Also:
"oracle.sql.DATE"
lastDayOfMonth
public oracle.sql.DATE lastDayOfMonth()
Overrides the Oracle SQL method of the same name to return a Date Domain object.
Overrides:
lastDayOfMonth in class oracle.sql.DATE
See Also:
"oracle.sql.DATE"
round
public oracle.sql.DATE round(java.lang.String prec)
Overrides the Oracle SQL method of the same name to return a Date Domain object.
Overrides:
round in class oracle.sql.DATE
See Also:
"oracle.sql.DATE"
setDayOfWeek
public oracle.sql.DATE setDayOfWeek(int day)
Overrides the Oracle SQL method of the same name to return a Date Domain object.
Overrides:
setDayOfWeek in class oracle.sql.DATE
See Also:
"oracle.sql.DATE"
toNumber
public oracle.sql.NUMBER toNumber()
Overrides:
toNumber in class oracle.sql.DATE
Returns:
a Date Domain object.
truncate
public oracle.sql.DATE truncate(java.lang.String prec)
Overrides:
truncate in class oracle.sql.DATE
Returns:
a Date Domain object.
main
public static void main(java.lang.String[] argv)
throws java.sql.SQLException
Internal: Applications should not invoke this method.-- Brian

Extending component class

Just recently wrote a diary applet that includes all twelve months of the year and thier corresponding days in month panels. The user can cylcle through each year and the panels change accordingly. User can also select and de-select days of the week in any month using left and right mouse clicks respectivley.
The individual months are painted to a Panel object and I use mouselisteners to determine x,y co-ordinates of the pointer to determine which days to colour as selected.
However yesterday I was given a new spec that requires each day selected to "remember" its color, year, month, location and was advised to create each individual day in my own class extending Component, not to use MouseEvents but Action events instead (did I mention I'm restricted to using Java 1.1!).
Could anyone explain what needs to be done to produce a months worth of days as a calendar using a class that extends Component. Cheers.

Each of your days is essentially a toggle/radio button, they can be selected and deselected. Ignore what they look like for now - it's the functionality that's important.
Each day component is responsible for determining whether it's been clicked or not.
Your month panel is then simply a grid of these (perhaps with headers etc.).
Your year display is just a card layout (or tabbed pane or whatever) of various month panels.
Here's an example of how to code up a simple day component:
public class DayComponent extends Component implements MouseListener
// The date that this component represents
// Could actually be a Date but we'll keep it simple for now
private int day;
// Whether this day is selected
private boolean selected;
public DayComponent(int day)
    this.day = day;
    selected = false;
    // This component listens for mouse events over itself
    addMouseListener(this);
public void setSelected(boolean selected)
    this.selected = selected;
    repaint(); // Causes this component to update its background
public boolean isSelected()
    return selected;
public Dimension getPreferredSize()
    return new Dimension(20, 20); // Or something
public void paint(Graphics g)
    g.setColor(selected?Color.lightGray:Color.yellow); // For example
    g.fillRect(0, 0, getSize().width, getSize().height);
    g.setColor(Color.black);
    g.drawString(String.valueOf(day), 10, 10); // Work out the position properly...
public void mouseEntered(MouseEvent e)
public void mouseExired(MouseEvent e)
public void mousePressed(MouseEvent e)
public void mouseReleased(MouseEvent e)
public void mouseClicked(MouseEvent e)
    // Toggle the selection state of this button when the mouse is clicked
    setSelected(!selected);
}That's really all there is to it. Storing the state of the buttons to the hard drive or somewhere else is a different matter.
If you think about what this is doing, it's basically just a radio button so you might find it neater to actually extend something like Button, JButton, JToggleButton etc. to get even more advanced behaviour. This is certainly worth doing eventually since you'll want to avoid writing layout and painting code if you can help it ('cos it can get messy).
Hope this helps.

Coldfusion create instance of class from data element when cosuming a webservice

I am calling the following wsdl via cfobject https://services-staging.labcorpsolutions.com/webservice/services/LabcorpOTS/wsdl/LabcorpO TS.wsdl
I am attempting to call the following method registerDonor(java.lang.String, java.lang.String, com.labcorp.ots.ws.data.CreateRegistrationRequest) which references the CreateRegistrationRequest data element.
I haven't been successful in creating an instance of the CreateRegistrationRequest class and setting values of its members, as well as the Phone class which is also a data element.
Any assistance would be greatly appreciated in creating instances of methods located in the targetNamespace="http://data.ws.ots.labcorp.com" of the wsdl.
Thanks

Thanks for the explanation and example. At first, I didn't understand what you were getting at, but after reading "Using Top-Level Containers" and "How to Use Root Panes" java tutorials it made much more sense. Unfortunately, the books I've read up to this point, did not cover those topics at all. The books simply stated that the first step in creating a Swing gui was to extend the JFrame, or JApplet, or etc.
Unfortunately, my original problem persists. I continue to get compile-time errors such as:
TestUserInterface.java:5: cannot find symbol
symbol: class UserInterface
location: class projects.web.TestUserInterface
                      UserInterface ui = new UserInterface(); Anyone know why?
Both the classes are in the same named packaged. Below is my code:
package projects.web;
import java.awt.*;
import javax.swing.*;
public class UserInterface extends JFrame{
     JPanel menuPanel = new JPanel();
     JPanel contentPanel = new JPanel();
     JPanel selectionPanel = new JPanel();
     JButton save = new JButton("Save");
     JButton addFiles = new JButton("Add");
     public UserInterface(){
     super("File Upload");
     setSize(500, 500);
     menuPanel.add(addFiles);
     selectionPanel.add(save);
     setLayout(new BorderLayout());
     add(menuPanel, BorderLayout.NORTH);
     add(contentPanel, BorderLayout.CENTER);
     add(selectionPanel, BorderLayout.SOUTH);
     } // end constructor
} // end UserInterface class
package projects.web;
public class TestUserInterface{
     public static void main(String[] args){
          UserInterface ui = new UserInterface();
} // end TestUserInterface class

FlexiDate.class extends Date.class

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