🚀 go-pugleaf

Gus:

I can tell you that, for an Applet, it absolutly has to be done in the
static initializer (you can see how JBuilder loads it by running the
Applet Wizard).  L&F loading is runtime, which means that compiler-like
tools such as the Deployment Wizard will not find the classes for you. 
Are you sure that the classes are in your archive (and that the archive
statement is in the applet html)?

What's the full error in the Java Console (after you switch back to the
static initializer)?

-Rich

Gus Bellingham wrote:
> 
> Hi,
>     this is about plugging in a custom LookAndFeel in Swing - newbies
> beware!
>     I've been trying to install a custom LookAndFeel class (source shown at
> bottom), and crazy things are going on. I've tried everything I can think
> of.  You are supposed to be able to call
> UIManager.setLookAndFeel("com.spiritone.gus.swing.ShadowLookAndFeel");
> with the full qualified class name, but it just fails with a
> ClassNotFoundException,  which is crazy because, I know for a fact the class
> files are in the right place (relative to the CLASSPATH), I can load them ok
> with Class.forName() in the very code block.
>     I've tried the other form of the UIManager.setLookAndFeel( ) method,
> passing in an instance of the LookAndFeel, and that works UNTIL you try to
> instantiate a Swing component, then the getUI( ) method fails, with a
> ClassNotFoundException on the ShadowButtonUI class,  which is also there, in
> the correct place, and which I can instantiate and test, without going
> through UIManager !
>     I've tried this in a static { } initializer, in the init( ) method, in
> the main( ) method of an Application, they all fail in the same way.  Its
> driving me nuts !    Any bright ideas are very gratefully accepted
> mailto:gus@spiritone.com     Thanks !
> 
> Here's the Swing JApplet :
> package JButton;
> 
> import java.awt.*;
> import java.awt.event.*;
> import java.applet.*;
> import javax.swing.*;
> import javax.swing.plaf.*;
> import com.spiritone.gus.swing.*;
> 
> public class Applet2 extends JApplet {
>   boolean isStandalone = false;
>   JPanel jPanel1 = new JPanel();
>   JButton jButton1;
>   //Pluggable LookAndFeel classes and ComponentUI
>   ButtonUI ui;
>   private static Class lnfClass, uiClass;
> 
>   FlowLayout flowLayout1 = new FlowLayout();
> 
>   //Initialize the applet
>   public void init() {
>     try {
>       System.out.println("Applet2 Setting Look & Feel:");
>       //UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
> 
> //UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName())
> ;
> 
>       /* I get a ClassNotFound Exception here !
>        * This sucks, because I've successfully loaded the class already with
> Class.forName() above ?
>        *
> UIManager.setLookAndFeel("com.spiritone.gus.swing.ShadowLookAndFeel");
>        */
> 
>       /* This one works, until a JButton is instantiated, it fails to load
> the ButtonUI class:
>        * UIDefaults.getUI() failed: no ComponentUI class for:
> javax.swing.JButton (see below)
>        */
>       UIManager.setLookAndFeel((LookAndFeel)(lnfClass.newInstance()));
>       System.out.println("UIManager L&F=" +
> UIManager.getLookAndFeel().getDescription());
>       uiClass =
> Class.forName(UIManager.getDefaults().getString("ButtonUI"));
>       System.out.println("ButtonUI Class loaded OK =" + uiClass.getName());
> 
>     }
>     catch (ClassNotFoundException e1) {
>       System.out.println("LookAndFeel : class notfound");
>       e1.printStackTrace(System.out);
>     }
>     catch (Exception e2) {
>       System.out.println("LookAndFeel : unavailable");
>       e2.printStackTrace(System.out);
>     }
> 
>     try  {
>       jbInit();
>     }
>     catch(Exception e3)  {
>       e3.printStackTrace();
>     }
>   }
> 
>   //Component initialization
>   private void jbInit() throws Exception {
>     System.out.println("Applet2 CodeBase=" + getCodeBase());
>     //this.setSize(new Dimension(300, 100));
>     System.out.println("About to create JButton");
>     jButton1 = new JButton();
>     jButton1.setText("Shadow JButton");
>     System.out.println("UIDefaults getUI for JButton=" +
> UIManager.getDefaults().getUI(jButton1));
>     /* Test the ShadowButtonUI without loading the whole LookAndFeel - works
> fine!
>      * ui = (ButtonUI)ShadowButtonUI.createUI(jButton1);
>      * jButton1.setUI(ui);
>      */
> 
>     jPanel1.setLayout(flowLayout1);
>     jPanel1.setBackground(Color.white);
>     this.getContentPane().add(jPanel1, BorderLayout.CENTER);
>     jPanel1.add(jButton1, null);
>   }
> 
>   //Get Applet information
>   public String getAppletInfo() {
>     return "ShadowLookAndFeel Button Applet";
>   }
> 
>   //static initializer for setting look & feel
>   static {
>     // LookAndFeel Class Loaded OK here
>     try {
>       lnfClass = Class.forName("com.spiritone.gus.swing.ShadowLookAndFeel");
>       if (lnfClass != null) {
>         System.out.println("L&F Class loaded OK =" + lnfClass.getName());
>       }
>     }
>     catch (ClassNotFoundException e1) {
>       System.out.println("LookAndFeel : class notfound");
>       e1.printStackTrace(System.out);
>     }
>     catch (Exception e2) {
>       System.out.println("LookAndFeel : unavailable");
>       e2.printStackTrace(System.out);
>     }
>   }
> }
> 
> Here's the problem (this is running under Appletviewer and JDK 1.2):
> 
> C:\JBUILDER3\java\bin\AppletViewer.exe -J-Djava.security.policy=C:\JBUILDER3
> \lib\appletviewer.policy -J-Djava.class.path=C:\JBuilder3\myclasses;C:\JBUIL
> DER3\lib\dx3.0.jar;C:\JBUILDER3\lib\dx3.0-res.jar;C:\JBUILDER3\lib\jbcl3.0.j
> ar;C:\JBUILDER3\lib\jbcl3.0-res.jar;C:\JBUILDER3\lib\jgl3.1.0.jar;C:\JBUILDE
> R3\lib\dbswing3.0.jar;C:\JBUILDER3\lib\dbswing3.0-res.jar;C:\JBUILDER3\java\
> lib\jdkdep.jar;C:\JBUILDER3\java\jre\lib\rt.jar;C:\JBUILDER3\java\lib\dt.jar
> ;C:\JBUILDER3\java\jre\lib\i18n.jar;C:\JBUILDER3\java\lib\tools.jar
> C:\JBuilder3\myclasses\JButton.Applet2.html
> AppAccelerator(tm) 1.2.010 for Java (JDK 1.2), x86 version.
> Copyright (c) 1997-1999 Inprise Corporation. All Rights Reserved.
> L&F Class loaded OK =com.spiritone.gus.swing.ShadowLookAndFeel
> Applet2 Setting Look & Feel:
> UIManager L&F=Components with offset shadows
> ButtonUI Class loaded OK =com.spiritone.gus.swing.ShadowButtonUI
> Applet2 CodeBase=file:/C:/JBuilder3/myclasses/
> About to create JButton
> UIDefaults.getUI() failed: no ComponentUI class for:
> javax.swing.JButton[,0,0,0x0,invalid,layout=javax.swing.OverlayLayout,alignm
> entX=null,alignmentY=null,border=,flags=0,maximumSize=,minimumSize=,preferre
> dSize=,defaultIcon=,disabledIcon=,disabledSelectedIcon=,margin=null,paintBor
> der=true,paintFocus=true,pressedIcon=,rolloverEnabled=false,rolloverIcon=,ro
> lloverSelectedIcon=,selectedIcon=,text=,defaultCapable=true]
> java.lang.Error
>  at javax.swing.UIDefaults.getUIError(UIDefaults.java:351)
>  at javax.swing.UIDefaults.getUI(Compiled Code)
>  at javax.swing.UIManager.getUI(Compiled Code)
>  at javax.swing.JButton.updateUI(JButton.java:115)
>  at javax.swing.AbstractButton.init(AbstractButton.java:1196)
>  at javax.swing.JButton.<init>(JButton.java:105)
>  at javax.swing.JButton.<init>(JButton.java:73)
>  at JButton.Applet2.jbInit(Applet2.java:71)
>  at JButton.Applet2.init(Applet2.java:59)
>  at sun.applet.AppletPanel.run(Compiled Code)
>  at java.lang.Thread.run(Compiled Code)
> UIDefaults getUI for JButton=null
> 
> It's the same if I run it in a Browser IE5 with the JRE 1.3 plugin:
> Java(TM) Plug-in: Version 1.3.0-C Using JRE version 1.3.0 Java HotSpot(TM)
> Client VM
> User home directory = C:\WINDOWS Proxy Configuration: no proxy  JAR cache
> enabled.
> L&F Class loaded OK =com.spiritone.gus.swing.ShadowLookAndFeel
> Applet2 Setting Look & Feel:
> UIManager L&F=Components with offset shadows
> ButtonUI Class loaded OK =com.spiritone.gus.swing.ShadowButtonUI
> Applet2 CodeBase=file:/C:/JBuilder3/myclasses/
> About to create JButton
> UIDefaults.getUI() failed: no ComponentUI class for:
> javax.swing.JButton[,0,0,0x0,invalid,layout=javax.swing.OverlayLayout,alignm
> entX=null,alignmentY=null,border=,flags=0,maximumSize=,minimumSize=,preferre
> dSize=,defaultIcon=,disabledIcon=,disabledSelectedIcon=,margin=null,paintBor
> der=true,paintFocus=true,pressedIcon=,rolloverEnabled=false,rolloverIcon=,ro
> lloverSelectedIcon=,selectedIcon=,text=,defaultCapable=true]
> java.lang.Error
> at javax.swing.UIDefaults.getUIError(Unknown Source)
> at javax.swing.UIDefaults.getUI(Unknown Source)
> at javax.swing.UIManager.getUI(Unknown Source)
> at javax.swing.JButton.updateUI(Unknown Source)
> at javax.swing.AbstractButton.init(Unknown Source)
> at javax.swing.JButton.<init>(Unknown Source)
> at javax.swing.JButton.<init>(Unknown Source)
> at JButton.Applet2.jbInit(Applet2.java:71)
> at JButton.Applet2.init(Applet2.java:59)
> at sun.applet.AppletPanel.run(Unknown Source)
> at java.lang.Thread.run(Unknown Source)
>  UIDefaults.getUI() failed: no ComponentUI class for:
> javax.swing.JButton[,0,0,0x0,invalid,layout=javax.swing.OverlayLayout,alignm
> entX=0.0,alignmentY=0.5,border=,flags=0,maximumSize=,minimumSize=,preferredS
> ize=,defaultIcon=,disabledIcon=,disabledSelectedIcon=,margin=null,paintBorde
> r=true,paintFocus=true,pressedIcon=,rolloverEnabled=false,rolloverIcon=,roll
> overSelectedIcon=,selectedIcon=,text=Shadow JButton,defaultCapable=true]
> java.lang.Error  at javax.swing.UIDefaults.getUIError(Unknown Source)  at
> javax.swing.UIDefaults.getUI(Unknown Source)  at
> JButton.Applet2.jbInit(Applet2.java:73)  at
> JButton.Applet2.init(Applet2.java:59)  at sun.applet.AppletPanel.run(Unknown
> Source)  at java.lang.Thread.run(Unknown Source)
> UIDefaults getUI for JButton=null
> 
> It's the same if I try it in the main( ) method of an Application:
> 
> C:\JBUILDER3\java\bin\javaw.exe -classpath
> "C:\JBuilder3\myclasses;C:\JBUILDER3\lib\dx3.0.jar;C:\JBUILDER3\lib\dx3.0-re
> s.jar;C:\JBUILDER3\lib\jbcl3.0.jar;C:\JBUILDER3\lib\jbcl3.0-res.jar;C:\JBUIL
> DER3\lib\jgl3.1.0.jar;C:\JBUILDER3\lib\dbswing3.0.jar;C:\JBUILDER3\lib\dbswi
> ng3.0-res.jar;C:\JBUILDER3\java\lib\jdkdep.jar;C:\JBUILDER3\java\jre\lib\rt.
> jar;C:\JBUILDER3\java\lib\dt.jar;C:\JBUILDER3\java\jre\lib\i18n.jar;C:\JBUIL
> DER3\java\lib\tools.jar" JButton.Application2
> AppAccelerator(tm) 1.2.010 for Java (JDK 1.2), x86 version.
> Copyright (c) 1997-1999 Inprise Corporation. All Rights Reserved.
> Loading LookAndFeel com.spiritone.gus.swing.ShadowLookAndFeel
> LookAndFeel Unavailable:
> java.lang.ClassNotFoundException: com/spiritone/gus/swing/ShadowLookAndFeel
>  at java.lang.Class.forName0(Native Method)
>  at java.lang.Class.forName(Class.java:124)
>  at javax.swing.UIManager.setLookAndFeel(UIManager.java:365)
>  at JButton.Application2.main(Application2.java:25)
> 
> Here's my custom LookAndFeel class, it's real simple :
> 
> package com.spiritone.gus.swing;
> 
> import javax.swing.UIDefaults;
> import javax.swing.plaf.metal.MetalLookAndFeel;
> import java.io.Serializable;
> 
> public class ShadowLookAndFeel extends MetalLookAndFeel implements
> Serializable {
> 
>   protected void initClassDefaults(UIDefaults table)  {
>     super.initClassDefaults(table);
>     table.put ("ButtonUI", "com.spiritone.gus.swing.ShadowButtonUI");
>   }
> 
>   public String getID() {
>     return "Shadow";
>   }
>   public String getName() {
>     return "Shadow L&F";
>   }
>   public String getDescription() {
>     return "Components with offset shadows";
>   }
> 
>   public boolean isNativeLookAndFeel() {
>     return false;
>   };
> 
>   public boolean isSupportedLookAndFeel() {
>     return true;
>   };
> 
>   public void initialize() {
>   }
>   public void uninitialize() {
>   }
>   public String toString() {
>    return getName() + " : " + getClass().getName();
>   }
> }