with which keyword can i handle the java component in GUI?

i would like to change the java slider property after i click a button, the problem is, normally we use the 'handles.X' to get in the thing which we want to handle. But with java component i got this reply.

 Reference to non-existent field 'jSlider2'.

this is the callback code

 function Pushbutton_Callback(hObject, eventdata, handles)
    set(handles.jSlider2,'Maximum',5);
end

this is the slider definition, which i wrote in OpeningFcn

 jSlider2 = javax.swing.JSlider(1,10,1);  
jSlider2 = javacomponent(jSlider2, [40,90,500,40]);
set(jSlider2, 'MajorTickSpacing',1, 'PaintTicks',true,'PaintLabels',true);

Answer 1

[Geoff Hayes]

Tong - try saving the jSlider2 to the handles structure in your OpeningFcn

jSlider2 = javax.swing.JSlider(1,10,1);  
handles.jSlider2 = javacomponent(jSlider2, [40,90,500,40]);
set(handles.jSlider2, 'MajorTickSpacing',1, 'PaintTicks',true,'PaintLabels',true);
guidata(hObject, handles);

The call to guidata is important as it will save the updated handles structure with the jSlider2 field.

[Tong Wang]

thanks