setSelectedValue

[Abs]

Hi!

I'm using the "setSelectedValue" method from the JList class to
select an item from a list of objects extending a class I developed
named "Transition". This is the code I cannot get to work:

DefaultListModel model=new DefaultListModel();
JList list=new JList(model);

model.addElement(new DefaultTransition());
model.addElement(new FadeTransition());

Transition transition=getTransition();
list.setSelectedValue(transition,true);

I supposed the "setSelectedValue" method would select one of the two
items in the list but nothing gets selected. What am I doing wrong ?


Thanks in advance

 

[Filip Larsen]

Abs wrote

I'm using the "setSelectedValue" method from the JList class to
select an item from a list of objects extending a class I developed
named "Transition".

JList uses the equals method on your elements to find the index of the
element you specify in the call to setSelectedValue. So, either give
your elements a proper equals semantic [define a boolean equals(Object)
and int hashCode() method] or pass a reference to an element that is in
the model.

However, you may find it easier to simply use JList.setSelectedIndex
instead.


Regards,

 

[Abs]

Abs wrote

I'm using the "setSelectedValue" method from the JList class to
select an item from a list of objects extending a class I developed
named "Transition".

JList uses the equals method on your elements to find the index of the
element you specify in the call to setSelectedValue. So, either give
your elements a proper equals semantic [define a boolean equals(Object)
and int hashCode() method] or pass a reference to an element that is in
the model.

However, you may find it easier to simply use JList.setSelectedIndex
instead.


Regards,

thanks for the info