I've downloaded the QT Jambi Preview and began playing with it.

First observation: It is extremely easy to install.
Second observation: It's seems very familiar
Third observation: It looks like a merging of C++ and Java, but with the familiar QT API. Here's a code snippit of the "Application" example:
Qt Code: 
  1. /****************************************************************************
  2. **
  3. ** Copyright (C) 1992-2006 Trolltech ASA. All rights reserved.
  4. **
  5. ** This file is part of Qt Jambi.
  6. **
  7. ** $JAVA_LICENSE$
  8. **
  9. ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
  10. ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  11. **
  12. ****************************************************************************/
  13.  
  14. package com.trolltech.examples;
  15.  
  16. import com.trolltech.qt.core.*;
  17. import com.trolltech.qt.gui.*;
  18.  
  19. public class Application extends QMainWindow {
  20.  
  21.     private String curFile;
  22.     private QTextEdit textEdit;
  23.     private QMenu fileMenu;
  24.     private QMenu editMenu;
  25.     private QMenu helpMenu;
  26.  
  27.     private QToolBar fileToolBar;
  28.     private QToolBar editToolBar;
  29.  
  30.     private QAction newAct;
  31.     private QAction openAct;
  32.     private QAction saveAct;
  33.     private QAction saveAsAct;
  34.     private QAction exitAct;
  35.     private QAction cutAct;
  36.     private QAction copyAct;
  37.     private QAction pasteAct;
  38.     private QAction aboutAct;
  39.     private QAction aboutQtAct;
  40.  
  41.     private String rsrcPath = "classpath:com/trolltech/images";
  42.  
  43.     public Application()
  44.     {
  45.         QMenuBar menuBar = new QMenuBar();
  46.         setMenuBar(menuBar);
  47.  
  48.         setWindowIcon(new QIcon("classpath:com/trolltech/images/logo_32.png"));
  49.  
  50.         textEdit = new QTextEdit();
  51.         setCentralWidget(textEdit);
  52.  
  53.         try {
  54.             createActions();
  55.         } catch (Exception e) {
  56.             e.printStackTrace();
  57.         }
  58.         createMenus();
  59.         createToolBars();
  60.         createStatusBar();
  61.  
  62.         readSettings();
  63.  
  64.         textEdit.document().contentsChanged.connect(this, "documentWasModified()");
  65.  
  66.         setCurrentFile("");
  67.     }
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I'm going to re-write my Homestead QT/C++ app in Jambi just to see how it sizes up. My boss is really excited about it because he favors Java over C++ and I'm the only pgmr who uses C++ in our dept and I'll be retiring in about two years.