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} else if (evt.getActionCommand().indexOf("removeBTN") != -1) {
deleteSingleImage(Integer.parseInt(evt.getActionCommand()
.substring(9, evt.getActionCommand().length())));
}
public void deleteSingleImage(int actioncommandID) {
list.remove(actioncommandID);
listSize = list.size();
for (int i = actioncommandID; i < listSize; i++){
list.get(i).setID(list.get(i).getID() - 1);
}
//für das Problem unwichtiger Code...
.
.
.
}