Remove Item from JList throws NullPointerException?

Your change "fixed" your problem because getSelectedValue().toString() will throw a NPE if there is no selection, whereas (String)getSelectedValue() will evaluate to null if there is no selection. But, if you ever put things in your list that aren't String s, then you'll get ClassCastException s when you try to cast the selected value to a String So, this may have solved your current problem, but it's not a solution really.

Your change "fixed" your problem because getSelectedValue().toString() will throw a NPE if there is no selection, whereas (String)getSelectedValue() will evaluate to null if there is no selection. But, if you ever put things in your list that aren't Strings, then you'll get ClassCastExceptions when you try to cast the selected value to a String. So, this may have solved your current problem, but it's not a solution really.

I would just do this: private void theListValueChanged(ListSelectionEvent e) { final Object selectedValue = theList. GetSelectedValue(); if ( selectedValue! = null ) { txtCameraName.

SetText( selectedValue.toString() ); } else { // Clear the text since there's no selection txtCameraName. SetText( null ); } }.

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