Referencing a Class from a Variable

sorry I also forgot to mention that I'm putting in values for _gameModel.scroll_Vx, and Vy from another class, the scroll class. When I try to reference the var from other classes it works but not the FirstEnemy Class.

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To use the utility classes from a war you have to place them under the web-inf/classes directory.
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The quick setup:
My Main class creates a JFrame and adds a few custom JPanels. One of the JPanels has a mouse listener and responses to the mouse clicks, and it works great.
I'd like to know if there's a way to have that JPanel invoke public, non-static methods from the Main class (the class which created it) without passing a reference for the instance of the Main class to the JPanel when it's (the JPanel) is created. Or is that the way you're supposed to do it?
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Thanks so much,
Matt

Hi Rhesus21,
A (sort of) similar question: can a component invoke methods of it's parent container? If so, how?Yes, simply this way :
public class MainFrame extends JFrame {
    private MyPanel panel;
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public class MyPanel extends JPanel {
    private MainFrame frame;
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Just like when any object of one class needs to access another object. Somewhere you'll have to pass the "host class" (actually "host object reference" is more close) to the thing that implements Runnable or extends Thread (however you designed it), so that the object can hold and use a reference to it.

Accessing a variable defined in one class from another class..

Greetings,
I've only been programming in as3 for a couple months, and so far I've written several compositional classes that take MovieClips as inputs to handle behaviors and interactions in a simple game I'm creating. One problem I keep coming upon is that I'd love to access the custom variables I define within one class from another class. In the game I'm creating, Main.as is my document class, from which I invoke a class called 'Level1.as' which invokes all the other classes I've written.
Below I've pasted my class 'DieLikeThePhishes'. For example, I would love to know the syntax for accessing the boolean variable 'phish1BeenHit' (line 31) from another class. I've tried the dot syntax you would use to access a MovieClip inside another MovieClip and it doesn't seem to be working for me. Any ideas would be appreciated. Thanks,
- Jeremy
package jab.enemy
import flash.display.MovieClip;
import flash.events.Event;
import jab.enemy.MissleDisappear;
public class DieLikeThePhishes
private var _clip2:MovieClip; // player
private var _clip3:MovieClip; //phish1
private var _clip4:MovieClip; //phish2
private var _clip5:MovieClip; //phish3
private var _clip6:MovieClip; //phish4
private var _clip10:MovieClip; // background
private var _clip11:MovieClip // missle1
private var _clip12:MovieClip // missle2
private var _clip13:MovieClip // missle3
private var _clip14:MovieClip // missle4
private var _clip15:MovieClip // missle5
private var _clip16:MovieClip // missle6
private var _clip17:MovieClip // missle7
private var _clip18:MovieClip // missle8
private var _clip19:MovieClip // missle9
private var _clip20:MovieClip // missle10
private var _clip21:MovieClip // missle11
private var _clip22:MovieClip // missle12
var ay1 = 0;var ay2 = 0;var ay3 = 0;var ay4 = 0;
var vy1 = 0;var vy2 = 0;var vy3 = 0;var vy4 = 0;
var phish1BeenHit:Boolean = false;var phish2BeenHit:Boolean = false;
var phish3BeenHit:Boolean = false;var phish4BeenHit:Boolean = false;
public function DieLikeThePhishes(clip2:MovieClip,clip3:MovieClip,clip4:MovieClip,clip5:MovieClip,clip6:M ovieClip,clip10:MovieClip,clip11:MovieClip,clip12:MovieClip,clip13:MovieClip,clip14:MovieC lip,clip15:MovieClip,clip16:MovieClip,clip17:MovieClip,clip18:MovieClip,clip19:MovieClip,c lip20:MovieClip,clip21:MovieClip,clip22:MovieClip)
_clip2 = clip2;_clip3 = clip3;_clip4 = clip4;_clip5 = clip5;_clip6 = clip6;
_clip10 = clip10;_clip11 = clip11;_clip12 = clip12;_clip13 = clip13;_clip14 = clip14;
_clip15 = clip15;_clip16 = clip16;_clip17 = clip17;_clip18 = clip18;_clip19 = clip19;
_clip20 = clip20;_clip21 = clip21;_clip22= clip22;
_clip3.stage.addEventListener(Event.ENTER_FRAME, onEnterFrame)
function onEnterFrame(event:Event):void
vy1+= ay1;_clip3.y += vy1; vy2+= ay2;_clip4.y += vy2;
vy3+= ay3;_clip5.y += vy3; vy4+= ay4;_clip6.y += vy4;
if (phish1BeenHit ==false)
if(_clip3.y >620)
{_clip3.y = 620;}
if (phish2BeenHit ==false)
if(_clip4.y >620)
{_clip4.y = 620;}
if (phish3BeenHit ==false)
if(_clip5.y >620)
{_clip5.y = 620;}
if (phish4BeenHit ==false)
if(_clip6.y >620)
{_clip6.y = 620;}
if (_clip11.hitTestObject(_clip3) ||_clip12.hitTestObject(_clip3)||_clip13.hitTestObject(_clip3)||_clip14.hitTestObject(_cl ip3)||_clip15.hitTestObject(_clip3)||_clip16.hitTestObject(_clip3)||_clip17.hitTestObject( _clip3)||_clip18.hitTestObject(_clip3)||_clip19.hitTestObject(_clip3)||_clip20.hitTestObje ct(_clip3)||_clip21.hitTestObject(_clip3)||_clip22.hitTestObject(_clip3))
_clip3.scaleY = -Math.abs(_clip3.scaleY);
_clip3.alpha = 0.4;
ay1 = 3
vy1= -2;
phish1BeenHit = true;
if (_clip11.hitTestObject(_clip4) ||_clip12.hitTestObject(_clip4)||_clip13.hitTestObject(_clip4)||_clip14.hitTestObject(_cl ip4)||_clip15.hitTestObject(_clip4)||_clip16.hitTestObject(_clip4)||_clip17.hitTestObject( _clip4)||_clip18.hitTestObject(_clip4)||_clip19.hitTestObject(_clip4)||_clip20.hitTestObje ct(_clip4)||_clip21.hitTestObject(_clip4)||_clip22.hitTestObject(_clip4))
_clip4.scaleY = -Math.abs(_clip4.scaleY);
_clip4.alpha = 0.4;
ay2 = 3
vy2= -2;
phish2BeenHit = true;
if (_clip11.hitTestObject(_clip5) ||_clip12.hitTestObject(_clip5)||_clip13.hitTestObject(_clip5)||_clip14.hitTestObject(_cl ip5)||_clip15.hitTestObject(_clip5)||_clip16.hitTestObject(_clip5)||_clip17.hitTestObject( _clip5)||_clip18.hitTestObject(_clip5)||_clip19.hitTestObject(_clip5)||_clip20.hitTestObje ct(_clip5)||_clip21.hitTestObject(_clip5)||_clip22.hitTestObject(_clip5))
_clip5.scaleY = -Math.abs(_clip5.scaleY);
_clip5.alpha = 0.4;
ay3 = 3
vy3= -2;
phish3BeenHit = true;
if (_clip11.hitTestObject(_clip6) ||_clip12.hitTestObject(_clip6)||_clip13.hitTestObject(_clip6)||_clip14.hitTestObject(_cl ip6)||_clip15.hitTestObject(_clip6)||_clip16.hitTestObject(_clip6)||_clip17.hitTestObject( _clip6)||_clip18.hitTestObject(_clip6)||_clip19.hitTestObject(_clip6)||_clip20.hitTestObje ct(_clip6)||_clip21.hitTestObject(_clip6)||_clip22.hitTestObject(_clip6))
_clip6.scaleY = -Math.abs(_clip6.scaleY);
_clip6.alpha = 0.4;
ay4 = 3
vy4= -2;
phish4BeenHit = true;
if (_clip3.y > 10000)
_clip3.x = 1000 +3000*Math.random()-_clip10.x;
_clip3.y = 300;
_clip3.alpha = 1;
_clip3.scaleY = Math.abs(_clip3.scaleY);
ay1 = vy1 = 0;
phish1BeenHit = false;
if (_clip4.y > 10000)
_clip4.x = 1000 +3000*Math.random()-_clip10.x;
_clip4.y = 300;
_clip4.alpha = 1;
_clip4.scaleY = Math.abs(_clip4.scaleY);
ay2 = vy2 = 0;
phish2BeenHit = false;
if (_clip5.y > 10000)
_clip5.x = 1000 +3000*Math.random()-_clip10.x;
_clip5.y = 300;
_clip5.alpha = 1;
_clip5.scaleY = Math.abs(_clip5.scaleY);
ay3 = vy3 = 0;
phish3BeenHit = false;
if (_clip6.y > 10000)
_clip6.x = 1000 +3000*Math.random()-_clip10.x;
_clip6.y = 300;
_clip6.alpha = 1;
_clip6.scaleY = Math.abs(_clip6.scaleY);
ay4 = vy4 = 0;
phish4BeenHit = false;
var missleDisappear1 = new MissleDisappear(_clip11,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear2 = new MissleDisappear(_clip12,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear3 = new MissleDisappear(_clip13,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear4 = new MissleDisappear(_clip14,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear5 = new MissleDisappear(_clip15,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear6 = new MissleDisappear(_clip16,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear7 = new MissleDisappear(_clip17,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear8 = new MissleDisappear(_clip18,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear9 = new MissleDisappear(_clip19,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear10 = new MissleDisappear(_clip20,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear11 = new MissleDisappear(_clip21,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear12 = new MissleDisappear(_clip22,_clip3,_clip4,_clip5,_clip6,_clip10);

I would approach it in much the same way as you would in java, by making getters and setters for all of your class variables.
Getters being for returning the values, Setters being for setting them.
So you would make a get function for the variable you want to access ala:
function get1PhishBeenHit():boolean {
return this.phish1BeenHit;
Then to access the value of that variable from outwith the class:
var result:boolean = ClassInstanceName.get1PhishBeenHit();

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This is a beginner question. If I use remoteClass to map a java class and a flex class, how can I access a static variable defined in java class from the flex code?
Thanks!

Static propeties are by default ignored in the blazeds for serialization. You can try using another global property in the java bean which maps to the value stored in the static property( Hopefully it should work)
eg,
public String instanceValue = ClassName.staticValue;
Ref: http://livedocs.adobe.com/blazeds/1/blazeds_devguide/help.html?content=serialize_data_3.ht ml

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Using JDev 9.0.3
I'm struggling with an error that's occuring that I know should not be...
I have two projects (SessionUtils & TradingSumStruts).
SessionUtils has 4 java files all of which have a package name of: com.arca.sessionutils.
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One of the java files in TradingSumStruts imports a class from SessionUtils
import com.arca.sessionutils.SessionUtil;
In TradingSumStruts project I have created a new user library and called it: SessionUtilsLib. This lib points to the classes directory of SessionUtils, and the src directory of SessionUtils in the same workspace.
I've shut down the oc4j server, deleted any existing class files for the above two projects, and recompiled both projects. When I run the app, I get the following error:
java.lang.NoClassDefFoundError: com/arca/sessionutils/SessionUtil
void com.arca.tradingsum.TradingSumInfo.<init>(javax.servlet.http.HttpServletRequest)
TradingSumInfo.java:67
when I attempt to call SessionUtil.xxxMethod().
I have double and triple checked my spelling, my library entries, my class files, and even re-booted my machine.
ANY ideas would be greatly appreciated!
-Teri
[email protected]

Don't use libraries for this. Define a project dependency for your project using the project properties dialog. This will automatically include your project classes without hardcoding the path into a library.

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Here is the code in the jsp to make the connection:
DatabaseHandler db = new DatabaseHandler() ;
String sql = "SELECT password FROM cms_users WHERE user =" + userName ;
java.sql.ResultSet rs = db . selectQuery( sql ) ;
Here is the DatabaseHandler class:
import java.sql.*;
public class DatabaseHandler
     // instance variables - replace the example below with your own
private Connection connection;
     * Constructor for objects of class DatabaseHandler
     public DatabaseHandler()
String url = "jdbc:odbc:javadatabase";
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Class.forName( "sun.jdbc.odbc.JdbcOdbcDriver" );
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catch ( ClassNotFoundException cnfex )
System.err.println( "Failed to load JDBC/ODBC driver." );
cnfex.printStackTrace();
System.exit( 1 ); // terminate program
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System.err.println( "Unable to connect" );
sqlex.printStackTrace();
public ResultSet selectQuery( String query )
Statement statement;
ResultSet resultSet = null ;
try
statement = connection.createStatement();
resultSet = statement.executeQuery( query );
catch ( SQLException sqlex )
sqlex.printStackTrace();
System . exit( 1 ) ;
return resultSet ;
Here is the error i am getting when i try to run the jsp script:
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 2 in the jsp file: /ValidateLogon.jsp
Generated servlet error:
[javac] Compiling 1 source file
C:\Program Files\Apache Group\Tomcat 4.1\work\Standalone\localhost\cms\ValidateLogon_jsp.java:47: cannot find symbol
symbol : class DatabaseHandler
location: class org.apache.jsp.ValidateLogon_jsp
DatabaseHandler db = new DatabaseHandler() ;
^

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http://java.sun.com/products/jsp/tags/11/syntaxref11.fm7.html

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Hi ..... can somebody plz tell me
How to call a Java Class from another Java Class assuming both in the same Package??
I want to call the entire Java Class (not any specific method only........I want all the functionalities of that class)
Please provide me some slotuions!!
Waiting for some fast replies!!
Regards
Smita Mohanty

Hi Smita,
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e.g.
you have developed A.java and B.java, both are in same package.
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java.lang.NoSuchFieldException: deploy_1
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ie.
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Jason San Jose wrote:
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Jason San Jose
Software Engineer, Flash Builder
What is "package explorer"? I can't find a reference to it in the documentation. I'm using Flex Builder 3 on Mac OS X if it matters.
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one.java
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kumar.vijaydahiya wrote:
.It is set in environment variable.path=C:\bea\jdk141_02\bin;.,C:\oraclexe\app\oracle\product\10.2.0\server\bin;. command is:
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c:\Core\co\javac main.javaBut it give error.
Both java classes in co package.Okay, open a command prompt and execute these two commands:
// to compile both classes:
javac -cp c:\Core c:\Core\co\*.java
// to run your main-class:
java -cp c:\Core co.main

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try.
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Cheers,
Sumit Mittal

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