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Форум программистов > Java: GUI и Java FX приложения > Image преобразовать в ImageIcon

Автор: darkvivi 27.10.2013, 11:29

Всем доброго времени суток! Возникла проблема: когда я получаю изображение из БД при помощи BLOB, я создаю image. Потом я преобразовываю ег в IconImage при помощи

Код


IconImage img = new IconImage (image)

Иконка мне нужна для JTextPane, чтобы вставить её туда.

Код


tp.insertIcon(img);

Итого мне этот insert выдаёт ошибку java.lang.NullPointerException...
Что делать? smile

image точно не null, у меня даже if есть для этого

Код


if (image != null)

Картинка image создаётся так:

Код


image = Toolkit.getDefaultToolkit().createImage(
                                    bout.toByteArray());

Автор: Sherst 27.10.2013, 20:16

Приведите полностью стектрейс ошибки. И что такое объект image, какой у него тип?

Автор: darkvivi 28.10.2013, 17:33

image объекта Image, т.е.

Код


Image image = new Image();

java.lang.NullPointerException
    at TaskLot.TestFrame.loadPicture(TestFrame.java:1319)
    at TaskLot.TestFrame$23.actionPerformed(TestFrame.java:1164)
    at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
    at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
    at java.awt.Component.processMouseEvent(Unknown Source)
    at javax.swing.JComponent.processMouseEvent(Unknown Source)
    at java.awt.Component.processEvent(Unknown Source)
    at java.awt.Container.processEvent(Unknown Source)
    at java.awt.Component.dispatchEventImpl(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
    at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
    at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Window.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
    at java.awt.EventQueue.access$200(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
    at java.awt.EventQueue$4.run(Unknown Source)
    at java.awt.EventQueue$4.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
    at java.awt.EventQueue.dispatchEvent(Unknown Source)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.run(Unknown Source)

Добавлено через 2 секунды
image объекта Image,  т.е.

Код


Image image = new Image();

Автор: Sherst 29.10.2013, 23:12

Может как-то так?

Код


try {                                                                                        
    InputStream in = rset.getBlob("IMAGE").getBinaryStream();                                
    ByteArrayOutputStream bout = new ByteArrayOutputStream();                                
    byte[] buffer = new byte[32 * 1024];                                                     
    while (true) {                                                                           
        int r = in.read(buffer);                                                             
        if (r > 0) {                                                                         
            bout.write(buffer, 0, r);                                                        
        } else {                                                                             
            break;                                                                           
        }                                                                                    
    }                                                                                                                                
                                                                                             
    image = Toolkit.getDefaultToolkit().createImage(bout.toByteArray());    
    IconImage img = new IconImage (image)                 
                                                                                                                                                                                                                                      
    bout.flush();                                                                            
    bout.close();                                                                            
    in.close();                                                                              
                                   
} catch (IOException e) {                                                                    

}

Где rset - ваш ResultSet из БД.