Importing classes in Jsdk 1.4.2

Hi,
I have two swing applications that run perfectly well when compiled and run. But then I am trying to include these two programs as two tabbed panes in a third program.
I try to import classes from the other two programs using a simple import statement. But when I compile it the compiler return an error statement.
I tried putting a package line in both the programs and tried importing it as a package in the third one and it says invalid package name.
Can anybody help.
Thanks in advance.

OK here is the code. This is a example code from the book Java2 from scratch
First file
PortfoilioTotalsPanel.java
// Import the packages used by this class
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
// PortfolioTotalsPanel Class
public class PortfolioTotalsPanel extends JPanel
// Define the dark green color
public final static Color darkGreen = new Color( 0, 150, 40 );
// Create our labels
JLabel lblDollarChange = new JLabel( "Dollar Change:", JLabel.CENTER );
JLabel lblPercentChange = new JLabel( "Percent Change:", JLabel.CENTER );
// Constructor
public PortfolioTotalsPanel()
// Set the layout manager
setLayout( new GridLayout( 2, 1 ) );
// Add the labels to the JPanel
add( lblDollarChange );
add( lblPercentChange );
// setDollarChange( fDollarChange )
// Set the Dollar Change label to the dollar amount in fDollarChange
public void setDollarChange( Float fDollarChange )
// Set color based off of value
if( fDollarChange.floatValue() > 0 )
// Green for positive
lblDollarChange.setForeground( darkGreen );
else if( fDollarChange.floatValue() < 0 )
// Red for negative
lblDollarChange.setForeground( Color.red );
else
// Black for no change
lblDollarChange.setForeground( Color.black );
// Set the label text
lblDollarChange.setText( "Dollar Change: $" + fDollarChange.toString() );
// setPercentChange( fPercentChange )
// Set the Percent Change label to the percent in fDollarChange
public void setPercentChange( Float fPercentChange )
// Set color based off of value
if( fPercentChange.floatValue() > 0 )
// Green for positive
lblPercentChange.setForeground( darkGreen );
else if( fPercentChange.floatValue() < 0 )
// Red for negative
lblPercentChange.setForeground( Color.red );
else
// Black for no change
lblPercentChange.setForeground( Color.black );
// Set the label text
lblPercentChange.setText( "Percent Change: " + fPercentChange.toString() + "%" );
// Main application entry point into this class
public static void main( String[] args )
// Create a JFrame object
JFrame frame = new JFrame( "Portfolio Totals" );
// Create an PortfolioTotalsPanel Object
PortfolioTotalsPanel app = new PortfolioTotalsPanel();
// Set the values of the labels
app.setDollarChange( new Float( "-150.50" ) );
app.setPercentChange( new Float( "15" ) );
// Add our PortfolioTotalsPanel Object to the JFrame
frame.getContentPane().add( app, BorderLayout.CENTER );
// Resize our JFrame
frame.setSize( 600, 100 );
// Make our JFrame visible
frame.setVisible( true );
// Create a window listener to close our application when we
// close our application
frame.addWindowListener
     new WindowAdapter()
public void windowClosing( WindowEvent e )
System.exit( 0 );
Second Program
// ===========================================================================
// File: StockTablePanel.java
// Description: Sample file for Java 2 From Scratch
// ===========================================================================
// Import the libraries this application will use
import javax.swing.JTable;
import javax.swing.table.*;
import javax.swing.JScrollPane;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import java.awt.*;
import java.awt.event.*;
// Main application class: StockTablePanel
public class StockTablePanel extends JPanel
// Create a new Stock Table Model object
StockTableModel stockTableModel = new StockTableModel();
// Create a new JTable and associate it with the StockTableModel
JTable stockTable = new JTable( stockTableModel );
// Constructor
public StockTablePanel()
// Set the size of the table
stockTable.setPreferredScrollableViewportSize( new Dimension(620, 350) );
// Set the column widths for the table
TableColumn column = null;
for (int i = 0; i < 5; i++)
column = stockTable.getColumnModel().getColumn( i );
column.setPreferredWidth( stockTableModel.getColumnWidth( i ) );
// Create a scroll pane and add the stock table to it
JScrollPane scrollPane = new JScrollPane( stockTable );
// Add the scroll pane to our panel
add( scrollPane, BorderLayout.CENTER );
// float getDollarChange()
// Computes the total dollar change for the current portfolio
public float getDollarChange()
// Create a variable to hold the total change for all stocks
float fTotal = 0;
// Loop through all rows in the table
for( int i=0; i<stockTable.getRowCount(); i++ )
// Retrieve the dollar change for this stock
Float f = ( Float )stockTable.getValueAt( i, 10 );
// Add that value to our total
fTotal = fTotal + f.floatValue();
// Return the total value
return fTotal;
// float getPercentChange()
// Computes the total percentage change for the current portfolio
public float getPercentChange()
// Create a couple variables to hold the total the user spent
// on the stocks and the current value of those stocks
float fMoneySpent = 0;
float fMoneyWorth = 0;
// Loop through all rows in the table
for( int i=0; i<stockTable.getRowCount(); i++ )
// Extract some pertinent information for the computations
Float fLastSale = ( Float )stockTable.getValueAt( i, 2 );
Float fNumberOfShares = ( Float )stockTable.getValueAt( i, 6 );
Float fPricePaidPerShare = ( Float )stockTable.getValueAt( i, 7 );
// Add the amount of money the user spent on this stock
// to the total spent
fMoneySpent += fNumberOfShares.floatValue() * fPricePaidPerShare.floatValue();
// Add the value of this stock to the total value of the
// stock
fMoneyWorth += fNumberOfShares.floatValue() * fLastSale.floatValue();
// Compute the percentage change:
// TotalValue/TotalSpent * 100% - 100%
float fPercentChange = ( (fMoneyWorth / fMoneySpent) * 100 ) - 100;
// Return the percentage change
return fPercentChange;
// Main entry point into the StockTableApplication class
public static void main( String[] args )
// Create a frame to hold us and set its title
JFrame frame = new JFrame( "StockTablePanel Application" );
// Create an instance of our stock table panel
StockTablePanel stockTablePanel = new StockTablePanel();
// Add our tab panel to the frame
frame.getContentPane().add( stockTablePanel, BorderLayout.CENTER );
// Resize the frame
frame.setSize(640, 480);
// Make the windows visible
frame.setVisible( true );
// Set up a window listener to close the application window as soon as
// the application window closes
frame.addWindowListener
     new WindowAdapter()
public void windowClosing( WindowEvent e )
System.exit( 0 );
// Table Model Class - holds all of our row and column information
class StockTableModel extends AbstractTableModel
// Create the columns for the table
final String[] strArrayColumnNames =
"Sym",
"Company Name",
"Last",
"Hi",
"Lo",
"Vol",
"#Shares",
"$Shares",
"Total",
"%Change",
"$Change"
// Create the rows for the table - hard coded for now!!
final Object[][] obArrayData =
// Row One
"SAMS", // Symbol
"Sams Publishing", // Company Name
new Float( 10 ), // Last Sale
new Float( 12 ), // High
new Float( 8 ), // Low
new Double( 2000000 ), // Volume
new Float( 100 ), // Number of Shares Owned
new Float( 7.5 ), // Purchase price per share
new Float( 1000 ), // Total Holdings
new Float( 33 ), // Percent change (increase!)
new Float( 250 ) // Dollar change
// Row Two
"Good", // Symbol
"Good Company", // Company Name
new Float( 50 ), // Last Sale
new Float( 52 ), // High
new Float( 45 ), // Low
new Double( 4000000 ), // Volume
new Float( 100 ), // Number of Shares Owned
new Float( 30 ), // Purchase price per share
new Float( 5000 ), // Total Holdings
new Float( 33 ), // Percent change (increase!)
new Float( 250 ) // Dollar change
// Row Three
"BAD", // Symbol
"Bad Company", // Company Name
new Float( 20 ), // Last Sale
new Float( 22 ), // High
new Float( 18 ), // Low
new Double( 2000000 ), // Volume
new Float( 500 ), // Number of Shares Owned
new Float( 50 ), // Purchase price per share
new Float( 10000 ), // Total Holdings
new Float( -60 ), // Percent change (increase!)
new Float( -25000 ) // Dollar change
// Return the number of columns in the table
public int getColumnCount()
return strArrayColumnNames.length;
// Return the number of rows in the table
public int getRowCount()
return obArrayData.length;
// Get the column name from the strArrayColumnNames array for the "col"-th
// item
public String getColumnName( int col )
return strArrayColumnNames[col];
// Return the value, in the form of an Object, from the obArrayData object
// array at position (row, col)
public Object getValueAt( int row, int col )
     // We will compute columns 8, 9, and 10, so if the column number is
     // below eight, we can just return it without computing or retrieving
     // anything.
     if( col < 8 )
     return obArrayData[row][col];
     // Retrive the necessary values from the object array to compute all
     // of the remaining columns
     Float fLastSale = ( Float )obArrayData[row][2];
     Float fNumberOfShares = ( Float )obArrayData[row][6];
     Float fPurchasePrice = ( Float )obArrayData[row][7];
     switch( col )
     // Total Holdings = Last Sale(2) * Number of Shares Owned(6)
     case 8:
     // Build a new Float object with the product of the two
     Float fTotal = new Float
     // Note, these have to be converted to type "float" to
     // perform the multiplication
     fLastSale.floatValue() * fNumberOfShares.floatValue()
     // Return the result
     return( fTotal );
     // Percent change =
     // (Last Sale Price (2) / Purchase Price (7)) * 100% - 100 %
     case 9:
     Float fPercentChange = new Float
     ((fLastSale.floatValue() / fPurchasePrice.floatValue ()) * 100) - 100
     return fPercentChange;
     // Dollar Change =
     // LastSale*NumberOfShares - PurchasePrice * NumberOfShares
     case 10:
     Float fDollarChange = new Float
     ( fLastSale.floatValue() * fNumberOfShares.floatValue() )
     ( fPurchasePrice.floatValue() * fNumberOfShares.floatValue() )
     return fDollarChange;
     // We have included every case so far, but in case we add another
     // column and forget about it, let's just return its value
     default:
     return obArrayData[row][col];
// Return the class type, in the form of a Class, for the c-th column in
// the first (0-th indexed) element of the obArrayData object array
public Class getColumnClass( int c )
return getValueAt(0, c).getClass();
// Return true if the "col"-th column of the table is editable, false
// otherwise. The following columns are editable:
// Cell Description
// 0 Symbol
     // 6 Number of Shares Owned
     // 7 Purchase Price per Share
public boolean isCellEditable(int row, int col)
     // Check the column number
     if( col == 0 || col == 6 || col == 7 )
     return true;
     else
     return false;
// Set the value of the (row, col) element of the obArrayData to value
public void setValueAt(Object value, int row, int col)
     // Symbol
     if( col == 0 )
     // We need a string value - we can convert any
     // value to a string, so just assign it
     obArrayData[row][col] = value;
     // Number of Shares owned
     else if( col == 6 )
     // We need a number - either float or int
     obArrayData[row][col] = new Float( getNumberString( value.toString() ) );
     // Purchase Price per share
     else if( col == 7 )
     // We need a float
     obArrayData[row][col] = new Float( getNumberString( value.toString() ) );
     // Cell is not editable
     else
     return;
     // Notify our parent of the change
     fireTableCellUpdated(row, col);
// String getNumberString( String str )
// Read through str and return a new string with the numbers and decimal
// points contained in str
public String getNumberString( String str )
// Get str as a character array
char[] strSource = str.toCharArray();
// Create a buffer to copy the results into
char[] strNumbers = new char[strSource.length];
int nNumbersIndex = 0;
// Boolean to ensure we only have one decimal value
// in our number
boolean bFoundDecimal = false;
// Loop through all values of str
for( int i=0; i<strSource.length; i++ )
// Check for a digit or decimal point
if( Character.isDigit( strSource[i] ) )
strNumbers[nNumbersIndex++] = strSource;
else if( strSource[i] == '.' && !bFoundDecimal )
// Append the character to the String
strNumbers[nNumbersIndex++] = strSource[i];
// Note that we found the decimal value
bFoundDecimal = true;
// Build a new string to return to our caller
String strReturn = new String( strNumbers, 0, nNumbersIndex );
// Return our string
return strReturn;
// Return the column width of the column at index nCol
public int getColumnWidth( int nCol )
switch( nCol )
case 0:
case 2:
case 3:
case 4:
case 6:
case 7:
case 9:
return 50;
case 1:
return 125;
default:
return 75;
Third one that imports the previous two programs Classes
// Import the packages used by this class
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
// Import our other components
import StockTablePanel;
import PortfolioTotalsPanel;
// StockTableTabPanel
public class StockTableTabPanel extends JPanel implements TableModelListener
// Create our panels
StockTablePanel stockTablePanel = new StockTablePanel();
PortfolioTotalsPanel portfolioTotalsPanel = new PortfolioTotalsPanel();
// Constructor
public StockTableTabPanel()
// Set our layout
setLayout( new BorderLayout() );
// Initialize the portfolio panel
updatePortfolioTotals();
// Add the child panels to our JPanel
add( stockTablePanel );
add( portfolioTotalsPanel, BorderLayout.SOUTH );
// Add our class as a table model listener for the stock table
// model so that we can update the portfolio totals panel
// whenever the table changes.
stockTablePanel.stockTableModel.addTableModelListener( this );
// TableModelListener: tableChanged
public void tableChanged(TableModelEvent e)
// Make sure it is our table that changed
if( e.getSource() == stockTablePanel.stockTableModel )
// Call our method to update the portfolio totals
updatePortfolioTotals();
// public updatePortfolioTotals
// Updates the portfolio totals panel labels based off of the values
// in the stockTablePanel
public void updatePortfolioTotals()
// Get the values from the stockTablePanel and send them
// to the portfolioTotalsPanel
portfolioTotalsPanel.setDollarChange( new Float( stockTablePanel.getDollarChange() ) );
portfolioTotalsPanel.setPercentChange( new Float( stockTablePanel.getPercentChange() ) );
// Main application entry point into this class
public static void main( String[] args )
// Create a JFrame object
JFrame frame = new JFrame( "Stock Table Tab" );
// Create an StockTableTabPanel Object
StockTableTabPanel app = new StockTableTabPanel();
// Add our StockTableTabPanel Object to the JFrame
frame.getContentPane().add( app, BorderLayout.CENTER );
// Resize our JFrame
frame.setSize( 640, 440 );
// Make our JFrame visible
frame.setVisible( true );
// Create a window listener to close our application when we
// close our application
frame.addWindowListener
     new WindowAdapter()
public void windowClosing( WindowEvent e )
System.exit( 0 );

Similar Messages

Importing Class

I was reading the tutorial on importing class's. This is what
I read
Importing classes
To reference a class in another script, you must prefix the
class name with the class's package path. The combination of a
class's name and its package path is the class's fully qualified
class name. If a class resides in a top-level classpath
directory--not in a subdirectory in the classpath directory--then
its fully qualified class name is its class name.
To specify package paths, use dot (.) notation to separate
package directory names. Package paths are hierarchical, where each
dot represents a nested directory. For example, suppose you create
a class named Data that resides in a com/xyzzycorporation/ package
in your classpath. To create an instance of that class, you could
specify the fully qualified class name, as shown in the following
example:
var dataInstance = new com.xyzzycorporation.Data();
My Question is about com/xyzzycorporation/ . would the full
class parth be c:/com/xyzzycorporation/ . Why do they never state
the drive letter when teaching about directories.

Because there is no need. you don't need to reference the
drive letter.
Here's the basic jist of what they are saying....
Single Class File...
If you create your own custom class and want to use it in
your flash file, save it into the same directory as the fla file
and call the classes constructor. By default flash will look inside
the folder where the fla resides in for the class files if it
cannot find it inside the default directory.
Multiple Class Files - 1 Project (often referred to as
packages)
Use your qualified domain name but backwards.....
my domain is www.sd-dezign.com so if I was going to include a
package of utility class files in my document I would do the
following
Create a folder in the same folder with my fla name it com
and inside that a folder called sddezign and inside that utils and
all my as files would be in there...the folder structure might look
like this....
myfile.fla
com
>sddezign
>>utils
>>>box.as
>>>circle.as
To call the constructor for each class, I have two options.
The first which is by far the easiest looks like this
In whatever frame you need to call that class constructor
include "com.sddezign.utils.*";
var myBox:Box = new Box();
The second method requires more typing and can get tedious
var myBox = new com.sddezign.utils.Box();
Hope this helps you a bit better.

Not allowed to import classes without package names?

Hi,
I have a few questions on Packages and importing?
1. Is the following true that it is illegal to import classes in the same package as the current class, will this cause a comilation error? If this is the case where in the Java Language specification is this actually written as I could not find it?
2. This has probably been answered by question 1 but if I have 2 classes in the same package and if I import 1 of the classes into the other class, is it illegal to import it by just using the class name and not the package name as well, ie
if the package name is ie.tcd
and the 2 class names are exp1.class and exp2.class, can I do this in class 2
package ie.tcd;
import exp1;
public class exp2 {
3. Is it illegal to import classes that are not explicitly part of any package or must a class be part of a package to be imported. I read somewhere that while this was always illegal it is only after jdk 1.4.2 that this is being enforced? If this is the case where in the Java Language specification is this actually written as I could not find it either?
Thanks very much for any help,
John

Was just also wondering, 1 other thing, I am looking
at someone elses code they have 2 classes (Class A
and Class B) in the same package (pkg). The person
imports class A into B:
package pkg;
import A;
public class B {
Is this legal code (or was it ever)?Not if A is really in pkg.A. If there is an A in the unnamed package it was legal, or at least it was understood by the compiler, and now it isn't (to both).
Can you import or is there a point in importing a class in the same
package?Only by naming the package in the import statement. If the current and the import statement are in the same package the import is redundant.
If there is a point would you import just be
using the class name (this would be illegal after jdk
1.4) or should you use the whole package name even
though it is in the package anyways?As I understand it you must always use the whole package name in imports.

Compilation Error for import classes not found in generated Proxy Class

Hi,
We are generating java classes for the COM dll using JCOM com2java compiler.
We are getting a compilation error for import class not found when compiling the
generated Proxy java source code. It can't find the com.bea.jcom.Dispatch class that
the generated Proxy java source code extends. It also can't find com.bea.jcom.Variant
or com.bea.jcom.Param. These are interfaces or data types or classes used by COM
library.
I added weblogic.jar to my class path and the only Dispatch class i found inside
the weblogic.jar is com.linar.jintegra.Dispatch;
We have com objects for which we want to develop an EJB client to interface with
the COM object using JCOM with Native Mode disabled.
Any help on the compilation error..I tried changing the extends for Dispatch to com.linar.jintegra.Dispatch
but the other errors are still there.
To begin with, I think the generated code should not refer to any of the COM data
types.
Any help please.
Thank you in advance,
Regards,
Rahul Srivastava
[email protected]

Hi,
I resolved the other errors by changing all references from com.bea.jcom.Variant
etc to com.linar.jintegra.class name..all were present under the com.linar.jintegra
package.
Thank you all anyways,
Regards,
rahul
"Rahul Srivastava" <[email protected]> wrote:
>
Hi,
We are generating java classes for the COM dll using JCOM com2java compiler.
We are getting a compilation error for import class not found when compiling
the
generated Proxy java source code. It can't find the com.bea.jcom.Dispatch
class that
the generated Proxy java source code extends. It also can't find com.bea.jcom.Variant
or com.bea.jcom.Param. These are interfaces or data types or classes used
by COM
library.
I added weblogic.jar to my class path and the only Dispatch class i found
inside
the weblogic.jar is com.linar.jintegra.Dispatch;
We have com objects for which we want to develop an EJB client to interface
with
the COM object using JCOM with Native Mode disabled.
Any help on the compilation error..I tried changing the extends for Dispatch
to com.linar.jintegra.Dispatch
but the other errors are still there.
To begin with, I think the generated code should not refer to any of the
COM data
types.
Any help please.
Thank you in advance,
Regards,
Rahul Srivastava
[email protected]

Inner class vs. imported class

Hi everyone,
I have entitiy beans created for a client's web app I'd like to use in the
web service using WebLogic Workshop 7.0. Say the classes are imported like
this in the services:
import com.hoike.clientname.ap.bean.Invoice
import com.hoike.clientname.ap.bean.Vendor
Instances of these classes are used in callback methods and some of the
service methods.
When I generate the CTRL file, it actually adds those imported classes as
inner class of the service defined.
The problem is that when I try to used these services from another service,
I cannot use the imported classes (as Invoice or Vendor), but instead I have
to use the inner class (InvoiceService.Invoice or VendorService.Vendor)
Does WebLogic Workshop 7.0 only allow you to use inner classes? Is there a
way to use custom classes as method parameters?
Thanks in advance!
Makoto

how do you declare your inner class?
Is it (public)
public static class MyInnerClassor (private)
private static class MyInnerClassor (package)
static class MyInnerClassor (protected)
protected static class MyInnerClassTry to change the way you declare the inner class. Use protected or package or public instead.

Problem importing classes and beans

Hey there. Im having one major fustrating problem! When I code supporting classes and beans for my JSPs I get a code 500 internal server error when trying to import (via <%@ page import="class" %> and <jsp:useBean/>) Im storing my classes and beans in the WEB-INF folder and the calling JSPs are located in /ROOT/tests/8/jsp.jsp. Im using the following to import a class or bean:
<%@ import="aClass" %>
Seen as tho its in the WEB-INF folder I won't have to explicitly refer to where the class is located, just the class name.
I never had this problem when I was using my hosting service. Its only on my localhost server in which I get the Internal Server error.
Help appreciated, thx.
PS: Im quite new to JSP/Java Servlet.

import (via <%@ page import="class" %> and
<jsp:useBean/>) Im storing my classes and beans in the
WEB-INF folder try put your class file in WEB-INF/classes.
or first put bean in the package, like WEB-INF/classes/packagename/beanclass
in jsp page:
<jsp:useBean id="Mybean" class="packagename.beanclass" scope="request" />
Question: is /ROOT a context entry in your server.xml?
Which JSP Container (version) you use? Maybe your localhost server's set up is different with your hosting.

Hi, new to 3D, doubt in importing class

hi all,
i m new to JAVA 3D, i currrently hv a simple example source which i try to compile it, it just can't, saying that class not found, but i m sure i hv download and install the JAVA 3D for DirectX 1.3.1, also i hv the following code
import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Label;
import java.awt.GraphicsConfiguration;
// below having importing class problem
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.universe.*;
import com.sun.j3d.utils.geometry.*;
import javax.media.j3d.*;
import javax.vecmath.*;can anyone guide me, thank you

That is the way I understand it. Here is the information from the documentation.
The version of the Export utility must be equal to the version of either the source or target database, whichever is earlier.
For example, to create an export file for an import into a later release database, use a version of the Export utility that equals the source database. Conversely, to create an export file for an import into an earlier release database, use a version of the Export utility that equals the version of the target database.
In general, you can use the Export utility from any Oracle8 release to export from an Oracle9i server and create an Oracle8 export file.
Then further down is this handy table:
Table 21-5 Using Different Releases of Export and Import
Export from Import to Use Export Release Use Import Release
10.1.0 9.0.2 9.0.2 9.0.2
So, that is the way I understand this. I have not done this, but this is how I undertand it to work.
Please correct me if I am wrong.
Thanks
Dean

Cannot import classes

I have one class calling another, like this:
import CloseWindowListener;
import DatabaseSearchControls;
import java.awt.event.*;
public class DatabaseSearch {
     public static void main (String[] args) {
          DatabaseSearchControls frame = new DatabaseSearchControls();
          frame.addWindowListener ( new CloseWindowListener() );
          frame.show();
I get these errors when I compile DatabaseSearch:
C:\Documents and Settings\Korbel\My Documents\benmay\DatabaseSearch.java:9: '.' expected
import CloseWindowListener;
^
C:\Documents and Settings\Korbel\My Documents\benmay\DatabaseSearch.java:10: '.' expected
import DatabaseSearchControls;
The other 2 files complied correctly and are in the same directory. Anyone ever seen this and know what I am doing wrong?
Thank you!

Are you compiling with version 1.4? If so, it is now invalid to import classes that don't belong to a package. It is not necessary to do so anyway, so just remove the import statements. Better yet, follow the Java standard and put each class you write into a named package, using the package statement.

Importing classes confusion AS3

I must admit, I don't know Actionscript 3.0 extremely well but I know my way around it and am able to get by as a designer.
I'm just wondering if classes should ALWAYS be imported. The reason I ask is because sometimes I don't import classes but my Actionscript still works without any problems.
Just wondering if anyone could shed some light on this please?
Thanks

Are you using custom classes? If so then all of the ones you use will be required.
So suppose you have in your code:
var myInstance:SomeClass = new SomeClass();
Then at the top you should add
import com.mydomain.somePackage.SomeClass;
Or if you are using packages like TweenLite or such. Even if you have added that to your classpath and it works without the import statement, it would be a surprise if you move it to another machine that doesn't have that installed.
And of course the best way to find out is to have a problem where something goes wrong. That is really all that separates the noobs from the "pros" -- we have made a lot more mistakes than you've even thought of yet!

Importing classes... HELP!!!

I'm using JBuilder Enterprise Edition...
I open a .java file to edit and recompile to test my edit...
However I keep getting errors that classes imported in the ,java file do not exist...
I know they do, because I copied them locally to the folder where all the filess I need are located...
The .java files that compile into .class files are read-only (there are over 100 of them)
I've pulled them from a server to my local machine...
Even if I check them out in Visual Source Safe, I still get errors that the imported classes in the source code do not exist...
how do I fix this issue?

Looks like I had a copy of JBuilder installed after all. So I selected Project-> Project Properties select the Paths tab then the Required Libraries tab (lower tab), hit the add button, then hit the new button. Fill in the library name and select project to hold the library. Then search your disk for the jar or the directory that contains your classes. Then hit OK a few times.

Importing classes/jar files

Hi
im writing a simple mail program but i need to import classes or jar files
import com.oreilly.servlet.MailMessage;
is the line i have but i cant find the jar file/class
when i search for it i only get the description
where can i find tha actual jar file or package ???

you must to have the jar file from you want import classes if you don't have this jar you can't do this.
if you've the jar, you must indicate to your IDE environment where can find this jar file I don't know meybe in the common menu options > Project settings...
or if you're working with webserver (or stand alone)as Tomcat you need copy jar into /lib folder.

Error when I import classes using directive JSP page

Hi all!
I have installed JDeveloper 11g (11.1.1.3.0)
My applications are located in the C:\dir (JDEV_USER_DIR = C:\dir)
I Created application "Appliation1". In it i created 2 projects (Project1, in it beans session entity and other java classes; Project2, in it JSP).
I want import classes from Project1 to Project2 using next directive:
<%@ page contentType="text/html;charset=windows-1252"
import="project1.*"%>
so in Project properties of Project2 set the way to classes in Project1.
When i run JSP an error occurred:
Error(4,9): The import project1 cannot be resolved
Maybe i'm not set correctly the way to the classes
Thanks in advance.

angelr, thanks, it helped me)
In jdeveloper 10g i set address in Project Properties->Libraries and Classpath->Add JAR/Directory;
and set the way to my classes;
and it worked.
in the 11 version seems different

New syntax to import .class Files???

Using JDK 1.2.2 i coul import my own class files by typing
import ClassName;
Using the j2sdk1.4.0 compile I get the Error Message
`.` expected
Is there a new synatx for importing .class files???

Normally I don't help anyone under this username, but since the idiot Kayaman is here being his usual jerk-ness providing no meaningful help whatsoever (as usual), I'll let you in on the fact that 1.4 doesn't let you import un-packaged classes anymore. So just remove the import statement, or change your imported class into some kind of package.

Help Importing Classes

How do I obtain and import classes so that I can reuse them? For example there is a Person class that I want to reuse http://www.dcs.shef.ac.uk/~guy/java/lancs/Person.html and a Date class. How do I get a copy so that I can import it into my java program? I know this is a fairly straight forward question for anyone who is comfortable using Java. But for a beginner who grew up learning C++ I�m a little lost. Any help would be greatly appreciated. Also, I�m using Eclipse as my java editor/runtime environment. Thank you.

You have to find a copy of the .class file (or the Java source file and compile it to a .class file) and place the .class file in a directory that's accessible when Java executes. One way of doing that is to list the directory on the classpath, when you execute Java:
java -classpath <absolute path to directory> classfileName

Importing classes made by me

Hi , i have created a class called cookiecheck and have placed it in the / web directory of my tomcate context and i would like to import it. how should my import command look. at this moment it looks like this, import cookiecheck; ,but this does not work ,please could you tell me what i am doing wrong.

but when i upgraded one of the jsp tries to import a
class (that does not have a package)
eg: import site
complains that there is no site.*
any helpThat's the key. Once again, (since Java 1.4) you cannot import classes which do not belong to a package. Creating classes with no package has always been discouraged and since 1.4 that discouragement is even stronger. Refactor.

Importing classes in Jsdk 1.4.2

Similar Messages

Maybe you are looking for